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Merge pull request #1712 from felixhandte/workspace-efficiency-2 

Allocate Internal Buffers via Workspace Abstraction
dev
Yann Collet 2019-09-10 15:20:29 -07:00 committed by GitHub
parent 5ba495b622 a9d373f093
commit 22bd158e0f
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GPG Key ID: 4AEE18F83AFDEB23
16 changed files with 629 additions and 193 deletions
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4
build/VS2008/fullbench/fullbench.vcproj
View File

@ -510,6 +510,10 @@
RelativePath="..\..\..\lib\compress\zstd_compress_sequences.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_cwksp.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_fast.h"
>

4
build/VS2008/fuzzer/fuzzer.vcproj
View File

@ -546,6 +546,10 @@
RelativePath="..\..\..\lib\compress\zstd_compress_sequences.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_cwksp.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_fast.h"
>

4
build/VS2008/zstd/zstd.vcproj
View File

@ -626,6 +626,10 @@
RelativePath="..\..\..\lib\compress\zstd_compress_sequences.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_cwksp.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_fast.h"
>

4
build/VS2008/zstdlib/zstdlib.vcproj
View File

@ -558,6 +558,10 @@
RelativePath="..\..\..\lib\compress\zstd_compress_sequences.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_cwksp.h"
>
</File>
<File
RelativePath="..\..\..\lib\compress\zstd_fast.h"
>

1
build/VS2010/fullbench/fullbench.vcxproj
View File

@ -197,6 +197,7 @@
<ClInclude Include="..\..\..\lib\compress\zstd_compress.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_literals.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_sequences.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_cwksp.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_double_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_lazy.h" />

1
build/VS2010/fuzzer/fuzzer.vcxproj
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@ -200,6 +200,7 @@
<ClInclude Include="..\..\..\lib\compress\zstd_compress.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_literals.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_sequences.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_cwksp.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_double_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_lazy.h" />

1
build/VS2010/libzstd-dll/libzstd-dll.vcxproj
View File

@ -82,6 +82,7 @@
<ClInclude Include="..\..\..\lib\compress\zstd_compress.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_literals.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_sequences.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_cwksp.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_double_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_lazy.h" />

1
build/VS2010/libzstd/libzstd.vcxproj
View File

@ -82,6 +82,7 @@
<ClInclude Include="..\..\..\lib\compress\zstd_compress.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_literals.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_sequences.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_cwksp.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_double_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_lazy.h" />

1
build/VS2010/zstd/zstd.vcxproj
View File

@ -79,6 +79,7 @@
<ClInclude Include="..\..\..\lib\compress\zstd_compress.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_literals.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_compress_sequences.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_cwksp.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_double_fast.h" />
<ClInclude Include="..\..\..\lib\compress\zstd_lazy.h" />

402
lib/compress/zstd_compress.c
View File

@ -42,11 +42,10 @@ size_t ZSTD_compressBound(size_t srcSize) {
* Context memory management
***************************************/
struct ZSTD_CDict_s {
void* dictBuffer;
const void* dictContent;
size_t dictContentSize;
void* workspace;
size_t workspaceSize;
U32* entropyWorkspace; /* entropy workspace of HUF_WORKSPACE_SIZE bytes */
ZSTD_cwksp workspace;
ZSTD_matchState_t matchState;
ZSTD_compressedBlockState_t cBlockState;
ZSTD_customMem customMem;
@ -84,23 +83,26 @@ ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem)
ZSTD_CCtx* ZSTD_initStaticCCtx(void *workspace, size_t workspaceSize)
{
ZSTD_CCtx* const cctx = (ZSTD_CCtx*) workspace;
ZSTD_cwksp ws;
ZSTD_CCtx* cctx;
if (workspaceSize <= sizeof(ZSTD_CCtx)) return NULL; /* minimum size */
if ((size_t)workspace & 7) return NULL; /* must be 8-aligned */
memset(workspace, 0, workspaceSize); /* may be a bit generous, could memset be smaller ? */
ZSTD_cwksp_init(&ws, workspace, workspaceSize);
cctx = (ZSTD_CCtx*)ZSTD_cwksp_reserve_object(&ws, sizeof(ZSTD_CCtx));
if (cctx == NULL) {
return NULL;
}
memset(cctx, 0, sizeof(ZSTD_CCtx));
ZSTD_cwksp_move(&cctx->workspace, &ws);
cctx->staticSize = workspaceSize;
cctx->workSpace = (void*)(cctx+1);
cctx->workSpaceSize = workspaceSize - sizeof(ZSTD_CCtx);
/* statically sized space. entropyWorkspace never moves (but prev/next block swap places) */
if (cctx->workSpaceSize < HUF_WORKSPACE_SIZE + 2 * sizeof(ZSTD_compressedBlockState_t)) return NULL;
assert(((size_t)cctx->workSpace & (sizeof(void*)-1)) == 0); /* ensure correct alignment */
cctx->blockState.prevCBlock = (ZSTD_compressedBlockState_t*)cctx->workSpace;
cctx->blockState.nextCBlock = cctx->blockState.prevCBlock + 1;
{
void* const ptr = cctx->blockState.nextCBlock + 1;
cctx->entropyWorkspace = (U32*)ptr;
}
if (!ZSTD_cwksp_check_available(&cctx->workspace, HUF_WORKSPACE_SIZE + 2 * sizeof(ZSTD_compressedBlockState_t))) return NULL;
cctx->blockState.prevCBlock = (ZSTD_compressedBlockState_t*)ZSTD_cwksp_reserve_object(&cctx->workspace, sizeof(ZSTD_compressedBlockState_t));
cctx->blockState.nextCBlock = (ZSTD_compressedBlockState_t*)ZSTD_cwksp_reserve_object(&cctx->workspace, sizeof(ZSTD_compressedBlockState_t));
cctx->entropyWorkspace = (U32*)ZSTD_cwksp_reserve_object(
&cctx->workspace, HUF_WORKSPACE_SIZE);
cctx->bmi2 = ZSTD_cpuid_bmi2(ZSTD_cpuid());
return cctx;
}
@ -128,7 +130,11 @@ static void ZSTD_freeCCtxContent(ZSTD_CCtx* cctx)
{
assert(cctx != NULL);
assert(cctx->staticSize == 0);
ZSTD_free(cctx->workSpace, cctx->customMem); cctx->workSpace = NULL;
/* Only free workspace if cctx not in workspace, otherwise the workspace
* will be freed when the cctx itself is freed. */
if ((void*)cctx->workspace.workspace != (void*)cctx) {
ZSTD_cwksp_free(&cctx->workspace, cctx->customMem);
}
ZSTD_clearAllDicts(cctx);
#ifdef ZSTD_MULTITHREAD
ZSTDMT_freeCCtx(cctx->mtctx); cctx->mtctx = NULL;
@ -160,7 +166,9 @@ static size_t ZSTD_sizeof_mtctx(const ZSTD_CCtx* cctx)
size_t ZSTD_sizeof_CCtx(const ZSTD_CCtx* cctx)
{
if (cctx==NULL) return 0; /* support sizeof on NULL */
return sizeof(*cctx) + cctx->workSpaceSize
/* cctx may be in the workspace */
return (cctx->workspace.workspace == cctx ? 0 : sizeof(*cctx))
+ ZSTD_cwksp_sizeof(&cctx->workspace)
+ ZSTD_sizeof_localDict(cctx->localDict)
+ ZSTD_sizeof_mtctx(cctx);
}
@ -1101,7 +1109,7 @@ size_t ZSTD_estimateCCtxSize_usingCCtxParams(const ZSTD_CCtx_params* params)
matchStateSize + ldmSpace + ldmSeqSpace;
DEBUGLOG(5, "sizeof(ZSTD_CCtx) : %u", (U32)sizeof(ZSTD_CCtx));
DEBUGLOG(5, "estimate workSpace : %u", (U32)neededSpace);
DEBUGLOG(5, "estimate workspace : %u", (U32)neededSpace);
return sizeof(ZSTD_CCtx) + neededSpace;
}
}
@ -1355,9 +1363,9 @@ typedef enum { ZSTDcrp_continue, ZSTDcrp_noMemset } ZSTD_compResetPolicy_e;
typedef enum { ZSTD_resetTarget_CDict, ZSTD_resetTarget_CCtx } ZSTD_resetTarget_e;
static void*
static size_t
ZSTD_reset_matchState(ZSTD_matchState_t* ms,
void* ptr,
ZSTD_cwksp* ws,
const ZSTD_compressionParameters* cParams,
ZSTD_compResetPolicy_e const crp, ZSTD_resetTarget_e const forWho)
{
@ -1365,9 +1373,7 @@ ZSTD_reset_matchState(ZSTD_matchState_t* ms,
size_t const hSize = ((size_t)1) << cParams->hashLog;
U32 const hashLog3 = ((forWho == ZSTD_resetTarget_CCtx) && cParams->minMatch==3) ? MIN(ZSTD_HASHLOG3_MAX, cParams->windowLog) : 0;
size_t const h3Size = ((size_t)1) << hashLog3;
size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32);
assert(((size_t)ptr & 3) == 0);
ms->hashLog3 = hashLog3;
memset(&ms->window, 0, sizeof(ms->window));
@ -1376,33 +1382,43 @@ ZSTD_reset_matchState(ZSTD_matchState_t* ms,
ms->window.nextSrc = ms->window.base + 1; /* see issue #1241 */
ZSTD_invalidateMatchState(ms);
assert(!ZSTD_cwksp_reserve_failed(ws)); /* check that allocation hasn't already failed */
ZSTD_cwksp_clear_tables(ws);
DEBUGLOG(5, "reserving table space");
/* table Space */
ms->hashTable = (U32*)ZSTD_cwksp_reserve_table(ws, hSize * sizeof(U32));
ms->chainTable = (U32*)ZSTD_cwksp_reserve_table(ws, chainSize * sizeof(U32));
ms->hashTable3 = (U32*)ZSTD_cwksp_reserve_table(ws, h3Size * sizeof(U32));
RETURN_ERROR_IF(ZSTD_cwksp_reserve_failed(ws), memory_allocation,
"failed a workspace allocation in ZSTD_reset_matchState");
DEBUGLOG(4, "reset table : %u", crp!=ZSTDcrp_noMemset);
if (crp!=ZSTDcrp_noMemset) {
/* reset tables only */
memset(ms->hashTable, 0, hSize * sizeof(U32));
memset(ms->chainTable, 0, chainSize * sizeof(U32));
memset(ms->hashTable3, 0, h3Size * sizeof(U32));
}
/* opt parser space */
if ((forWho == ZSTD_resetTarget_CCtx) && (cParams->strategy >= ZSTD_btopt)) {
DEBUGLOG(4, "reserving optimal parser space");
ms->opt.litFreq = (unsigned*)ptr;
ms->opt.litLengthFreq = ms->opt.litFreq + (1<<Litbits);
ms->opt.matchLengthFreq = ms->opt.litLengthFreq + (MaxLL+1);
ms->opt.offCodeFreq = ms->opt.matchLengthFreq + (MaxML+1);
ptr = ms->opt.offCodeFreq + (MaxOff+1);
ms->opt.matchTable = (ZSTD_match_t*)ptr;
ptr = ms->opt.matchTable + ZSTD_OPT_NUM+1;
ms->opt.priceTable = (ZSTD_optimal_t*)ptr;
ptr = ms->opt.priceTable + ZSTD_OPT_NUM+1;
ms->opt.litFreq = (unsigned*)ZSTD_cwksp_reserve_aligned(ws, (1<<Litbits) * sizeof(unsigned));
ms->opt.litLengthFreq = (unsigned*)ZSTD_cwksp_reserve_aligned(ws, (MaxLL+1) * sizeof(unsigned));
ms->opt.matchLengthFreq = (unsigned*)ZSTD_cwksp_reserve_aligned(ws, (MaxML+1) * sizeof(unsigned));
ms->opt.offCodeFreq = (unsigned*)ZSTD_cwksp_reserve_aligned(ws, (MaxOff+1) * sizeof(unsigned));
ms->opt.matchTable = (ZSTD_match_t*)ZSTD_cwksp_reserve_aligned(ws, (ZSTD_OPT_NUM+1) * sizeof(ZSTD_match_t));
ms->opt.priceTable = (ZSTD_optimal_t*)ZSTD_cwksp_reserve_aligned(ws, (ZSTD_OPT_NUM+1) * sizeof(ZSTD_optimal_t));
}
/* table Space */
DEBUGLOG(4, "reset table : %u", crp!=ZSTDcrp_noMemset);
assert(((size_t)ptr & 3) == 0); /* ensure ptr is properly aligned */
if (crp!=ZSTDcrp_noMemset) memset(ptr, 0, tableSpace); /* reset tables only */
ms->hashTable = (U32*)(ptr);
ms->chainTable = ms->hashTable + hSize;
ms->hashTable3 = ms->chainTable + chainSize;
ptr = ms->hashTable3 + h3Size;
ms->cParams = *cParams;
assert(((size_t)ptr & 3) == 0);
return ptr;
RETURN_ERROR_IF(ZSTD_cwksp_reserve_failed(ws), memory_allocation,
"failed a workspace allocation in ZSTD_reset_matchState");
return 0;
}
/* ZSTD_indexTooCloseToMax() :
@ -1418,13 +1434,6 @@ static int ZSTD_indexTooCloseToMax(ZSTD_window_t w)
return (size_t)(w.nextSrc - w.base) > (ZSTD_CURRENT_MAX - ZSTD_INDEXOVERFLOW_MARGIN);
}
#define ZSTD_WORKSPACETOOLARGE_FACTOR 3 /* define "workspace is too large" as this number of times larger than needed */
#define ZSTD_WORKSPACETOOLARGE_MAXDURATION 128 /* when workspace is continuously too large
* during at least this number of times,
* context's memory usage is considered wasteful,
* because it's sized to handle a worst case scenario which rarely happens.
* In which case, resize it down to free some memory */
/*! ZSTD_resetCCtx_internal() :
note : `params` are assumed fully validated at this stage */
static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
@ -1433,6 +1442,7 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
ZSTD_compResetPolicy_e const crp,
ZSTD_buffered_policy_e const zbuff)
{
ZSTD_cwksp* const ws = &zc->workspace;
DEBUGLOG(4, "ZSTD_resetCCtx_internal: pledgedSrcSize=%u, wlog=%u",
(U32)pledgedSrcSize, params.cParams.windowLog);
assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams)));
@ -1444,16 +1454,18 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
zc->seqStore.maxNbSeq, zc->seqStore.maxNbLit,
zbuff, pledgedSrcSize) ) {
DEBUGLOG(4, "ZSTD_equivalentParams()==1 -> consider continue mode");
zc->workSpaceOversizedDuration += (zc->workSpaceOversizedDuration > 0); /* if it was too large, it still is */
if (zc->workSpaceOversizedDuration <= ZSTD_WORKSPACETOOLARGE_MAXDURATION) {
ZSTD_cwksp_bump_oversized_duration(ws, 0);
if (!ZSTD_cwksp_check_wasteful(ws, 0)) {
DEBUGLOG(4, "continue mode confirmed (wLog1=%u, blockSize1=%zu)",
zc->appliedParams.cParams.windowLog, zc->blockSize);
if (ZSTD_indexTooCloseToMax(zc->blockState.matchState.window)) {
/* prefer a reset, faster than a rescale */
ZSTD_reset_matchState(&zc->blockState.matchState,
zc->entropyWorkspace + HUF_WORKSPACE_SIZE_U32,
&params.cParams,
crp, ZSTD_resetTarget_CCtx);
FORWARD_IF_ERROR(ZSTD_reset_matchState(
&zc->blockState.matchState,
ws,
&params.cParams,
crp,
ZSTD_resetTarget_CCtx));
}
return ZSTD_continueCCtx(zc, &params, pledgedSrcSize);
} } }
@ -1476,53 +1488,57 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
size_t const buffInSize = (zbuff==ZSTDb_buffered) ? windowSize + blockSize : 0;
size_t const matchStateSize = ZSTD_sizeof_matchState(&params.cParams, /* forCCtx */ 1);
size_t const maxNbLdmSeq = ZSTD_ldm_getMaxNbSeq(params.ldmParams, blockSize);
void* ptr; /* used to partition workSpace */
/* Check if workSpace is large enough, alloc a new one if needed */
{ size_t const entropySpace = HUF_WORKSPACE_SIZE;
/* Check if workspace is large enough, alloc a new one if needed */
{ size_t const cctxSpace = zc->staticSize ? sizeof(ZSTD_CCtx) : 0;
size_t const entropySpace = HUF_WORKSPACE_SIZE;
size_t const blockStateSpace = 2 * sizeof(ZSTD_compressedBlockState_t);
size_t const bufferSpace = buffInSize + buffOutSize;
size_t const ldmSpace = ZSTD_ldm_getTableSize(params.ldmParams);
size_t const ldmSeqSpace = maxNbLdmSeq * sizeof(rawSeq);
size_t const neededSpace = entropySpace + blockStateSpace + ldmSpace +
ldmSeqSpace + matchStateSize + tokenSpace +
bufferSpace;
size_t const neededSpace =
cctxSpace +
entropySpace +
blockStateSpace +
ldmSpace +
ldmSeqSpace +
matchStateSize +
tokenSpace +
bufferSpace;
int const workSpaceTooSmall = zc->workSpaceSize < neededSpace;
int const workSpaceTooLarge = zc->workSpaceSize > ZSTD_WORKSPACETOOLARGE_FACTOR * neededSpace;
int const workSpaceWasteful = workSpaceTooLarge && (zc->workSpaceOversizedDuration > ZSTD_WORKSPACETOOLARGE_MAXDURATION);
zc->workSpaceOversizedDuration = workSpaceTooLarge ? zc->workSpaceOversizedDuration+1 : 0;
int const workspaceTooSmall = ZSTD_cwksp_sizeof(ws) < neededSpace;
int const workspaceWasteful = ZSTD_cwksp_check_wasteful(ws, neededSpace);
DEBUGLOG(4, "Need %zuKB workspace, including %zuKB for match state, and %zuKB for buffers",
neededSpace>>10, matchStateSize>>10, bufferSpace>>10);
DEBUGLOG(4, "windowSize: %zu - blockSize: %zu", windowSize, blockSize);
if (workSpaceTooSmall || workSpaceWasteful) {
DEBUGLOG(4, "Resize workSpaceSize from %zuKB to %zuKB",
zc->workSpaceSize >> 10,
if (workspaceTooSmall || workspaceWasteful) {
DEBUGLOG(4, "Resize workspaceSize from %zuKB to %zuKB",
ZSTD_cwksp_sizeof(ws) >> 10,
neededSpace >> 10);
RETURN_ERROR_IF(zc->staticSize, memory_allocation, "static cctx : no resize");
zc->workSpaceSize = 0;
ZSTD_free(zc->workSpace, zc->customMem);
zc->workSpace = ZSTD_malloc(neededSpace, zc->customMem);
RETURN_ERROR_IF(zc->workSpace == NULL, memory_allocation);
zc->workSpaceSize = neededSpace;
zc->workSpaceOversizedDuration = 0;
ZSTD_cwksp_free(ws, zc->customMem);
FORWARD_IF_ERROR(ZSTD_cwksp_create(ws, neededSpace, zc->customMem));
DEBUGLOG(5, "reserving object space");
/* Statically sized space.
* entropyWorkspace never moves,
* though prev/next block swap places */
assert(((size_t)zc->workSpace & 3) == 0); /* ensure correct alignment */
assert(zc->workSpaceSize >= 2 * sizeof(ZSTD_compressedBlockState_t));
zc->blockState.prevCBlock = (ZSTD_compressedBlockState_t*)zc->workSpace;
zc->blockState.nextCBlock = zc->blockState.prevCBlock + 1;
ptr = zc->blockState.nextCBlock + 1;
zc->entropyWorkspace = (U32*)ptr;
assert(ZSTD_cwksp_check_available(ws, 2 * sizeof(ZSTD_compressedBlockState_t)));
zc->blockState.prevCBlock = (ZSTD_compressedBlockState_t*) ZSTD_cwksp_reserve_object(ws, sizeof(ZSTD_compressedBlockState_t));
RETURN_ERROR_IF(zc->blockState.prevCBlock == NULL, memory_allocation, "couldn't allocate prevCBlock");
zc->blockState.nextCBlock = (ZSTD_compressedBlockState_t*) ZSTD_cwksp_reserve_object(ws, sizeof(ZSTD_compressedBlockState_t));
RETURN_ERROR_IF(zc->blockState.nextCBlock == NULL, memory_allocation, "couldn't allocate nextCBlock");
zc->entropyWorkspace = (U32*) ZSTD_cwksp_reserve_object(ws, HUF_WORKSPACE_SIZE);
RETURN_ERROR_IF(zc->blockState.nextCBlock == NULL, memory_allocation, "couldn't allocate entropyWorkspace");
} }
ZSTD_cwksp_clear(ws);
/* init params */
zc->appliedParams = params;
zc->blockState.matchState.cParams = params.cParams;
@ -1541,58 +1557,55 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
ZSTD_reset_compressedBlockState(zc->blockState.prevCBlock);
ptr = ZSTD_reset_matchState(&zc->blockState.matchState,
zc->entropyWorkspace + HUF_WORKSPACE_SIZE_U32,
&params.cParams,
crp, ZSTD_resetTarget_CCtx);
/* ldm hash table */
/* initialize bucketOffsets table later for pointer alignment */
if (params.ldmParams.enableLdm) {
size_t const ldmHSize = ((size_t)1) << params.ldmParams.hashLog;
memset(ptr, 0, ldmHSize * sizeof(ldmEntry_t));
assert(((size_t)ptr & 3) == 0); /* ensure ptr is properly aligned */
zc->ldmState.hashTable = (ldmEntry_t*)ptr;
ptr = zc->ldmState.hashTable + ldmHSize;
zc->ldmSequences = (rawSeq*)ptr;
ptr = zc->ldmSequences + maxNbLdmSeq;
zc->maxNbLdmSequences = maxNbLdmSeq;
memset(&zc->ldmState.window, 0, sizeof(zc->ldmState.window));
}
assert(((size_t)ptr & 3) == 0); /* ensure ptr is properly aligned */
/* sequences storage */
zc->seqStore.maxNbSeq = maxNbSeq;
zc->seqStore.sequencesStart = (seqDef*)ptr;
ptr = zc->seqStore.sequencesStart + maxNbSeq;
zc->seqStore.llCode = (BYTE*) ptr;
zc->seqStore.mlCode = zc->seqStore.llCode + maxNbSeq;
zc->seqStore.ofCode = zc->seqStore.mlCode + maxNbSeq;
zc->seqStore.litStart = zc->seqStore.ofCode + maxNbSeq;
/* ZSTD_wildcopy() is used to copy into the literals buffer,
* so we have to oversize the buffer by WILDCOPY_OVERLENGTH bytes.
*/
zc->seqStore.litStart = ZSTD_cwksp_reserve_buffer(ws, blockSize + WILDCOPY_OVERLENGTH);
zc->seqStore.maxNbLit = blockSize;
ptr = zc->seqStore.litStart + blockSize + WILDCOPY_OVERLENGTH;
/* buffers */
zc->inBuffSize = buffInSize;
zc->inBuff = (char*)ZSTD_cwksp_reserve_buffer(ws, buffInSize);
zc->outBuffSize = buffOutSize;
zc->outBuff = (char*)ZSTD_cwksp_reserve_buffer(ws, buffOutSize);
/* ldm bucketOffsets table */
if (params.ldmParams.enableLdm) {
size_t const ldmBucketSize =
((size_t)1) << (params.ldmParams.hashLog -
params.ldmParams.bucketSizeLog);
memset(ptr, 0, ldmBucketSize);
zc->ldmState.bucketOffsets = (BYTE*)ptr;
ptr = zc->ldmState.bucketOffsets + ldmBucketSize;
zc->ldmState.bucketOffsets = ZSTD_cwksp_reserve_buffer(ws, ldmBucketSize);
memset(zc->ldmState.bucketOffsets, 0, ldmBucketSize);
}
/* sequences storage */
ZSTD_referenceExternalSequences(zc, NULL, 0);
zc->seqStore.maxNbSeq = maxNbSeq;
zc->seqStore.llCode = ZSTD_cwksp_reserve_buffer(ws, maxNbSeq * sizeof(BYTE));
zc->seqStore.mlCode = ZSTD_cwksp_reserve_buffer(ws, maxNbSeq * sizeof(BYTE));
zc->seqStore.ofCode = ZSTD_cwksp_reserve_buffer(ws, maxNbSeq * sizeof(BYTE));
zc->seqStore.sequencesStart = (seqDef*)ZSTD_cwksp_reserve_aligned(ws, maxNbSeq * sizeof(seqDef));
FORWARD_IF_ERROR(ZSTD_reset_matchState(
&zc->blockState.matchState,
ws,
&params.cParams,
crp, ZSTD_resetTarget_CCtx));
/* ldm hash table */
/* initialize bucketOffsets table separately for pointer alignment */
if (params.ldmParams.enableLdm) {
size_t const ldmHSize = ((size_t)1) << params.ldmParams.hashLog;
zc->ldmState.hashTable = (ldmEntry_t*)ZSTD_cwksp_reserve_aligned(ws, ldmHSize * sizeof(ldmEntry_t));
memset(zc->ldmState.hashTable, 0, ldmHSize * sizeof(ldmEntry_t));
zc->ldmSequences = (rawSeq*)ZSTD_cwksp_reserve_aligned(ws, maxNbLdmSeq * sizeof(rawSeq));
zc->maxNbLdmSequences = maxNbLdmSeq;
memset(&zc->ldmState.window, 0, sizeof(zc->ldmState.window));
ZSTD_window_clear(&zc->ldmState.window);
}
ZSTD_referenceExternalSequences(zc, NULL, 0);
/* buffers */
zc->inBuffSize = buffInSize;
zc->inBuff = (char*)ptr;
zc->outBuffSize = buffOutSize;
zc->outBuff = zc->inBuff + buffInSize;
DEBUGLOG(3, "wksp: finished allocating, %zd bytes remain available", ZSTD_cwksp_available_space(ws));
return 0;
}
@ -1652,8 +1665,8 @@ ZSTD_resetCCtx_byAttachingCDict(ZSTD_CCtx* cctx,
* has its own tables. */
params.cParams = ZSTD_adjustCParams_internal(*cdict_cParams, pledgedSrcSize, 0);
params.cParams.windowLog = windowLog;
ZSTD_resetCCtx_internal(cctx, params, pledgedSrcSize,
ZSTDcrp_continue, zbuff);
FORWARD_IF_ERROR(ZSTD_resetCCtx_internal(cctx, params, pledgedSrcSize,
ZSTDcrp_continue, zbuff));
assert(cctx->appliedParams.cParams.strategy == cdict_cParams->strategy);
}
@ -1701,8 +1714,8 @@ static size_t ZSTD_resetCCtx_byCopyingCDict(ZSTD_CCtx* cctx,
/* Copy only compression parameters related to tables. */
params.cParams = *cdict_cParams;
params.cParams.windowLog = windowLog;
ZSTD_resetCCtx_internal(cctx, params, pledgedSrcSize,
ZSTDcrp_noMemset, zbuff);
FORWARD_IF_ERROR(ZSTD_resetCCtx_internal(cctx, params, pledgedSrcSize,
ZSTDcrp_noMemset, zbuff));
assert(cctx->appliedParams.cParams.strategy == cdict_cParams->strategy);
assert(cctx->appliedParams.cParams.hashLog == cdict_cParams->hashLog);
assert(cctx->appliedParams.cParams.chainLog == cdict_cParams->chainLog);
@ -1960,7 +1973,7 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
ZSTD_entropyCTables_t* nextEntropy,
const ZSTD_CCtx_params* cctxParams,
void* dst, size_t dstCapacity,
void* workspace, size_t wkspSize,
void* entropyWorkspace, size_t entropyWkspSize,
const int bmi2)
{
const int longOffsets = cctxParams->cParams.windowLog > STREAM_ACCUMULATOR_MIN;
@ -1993,7 +2006,7 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
ZSTD_disableLiteralsCompression(cctxParams),
op, dstCapacity,
literals, litSize,
workspace, wkspSize,
entropyWorkspace, entropyWkspSize,
bmi2);
FORWARD_IF_ERROR(cSize);
assert(cSize <= dstCapacity);
@ -2029,7 +2042,7 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
ZSTD_seqToCodes(seqStorePtr);
/* build CTable for Literal Lengths */
{ unsigned max = MaxLL;
size_t const mostFrequent = HIST_countFast_wksp(count, &max, llCodeTable, nbSeq, workspace, wkspSize); /* can't fail */
size_t const mostFrequent = HIST_countFast_wksp(count, &max, llCodeTable, nbSeq, entropyWorkspace, entropyWkspSize); /* can't fail */
DEBUGLOG(5, "Building LL table");
nextEntropy->fse.litlength_repeatMode = prevEntropy->fse.litlength_repeatMode;
LLtype = ZSTD_selectEncodingType(&nextEntropy->fse.litlength_repeatMode,
@ -2039,10 +2052,14 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
ZSTD_defaultAllowed, strategy);
assert(set_basic < set_compressed && set_rle < set_compressed);
assert(!(LLtype < set_compressed && nextEntropy->fse.litlength_repeatMode != FSE_repeat_none)); /* We don't copy tables */
{ size_t const countSize = ZSTD_buildCTable(op, (size_t)(oend - op), CTable_LitLength, LLFSELog, (symbolEncodingType_e)LLtype,
count, max, llCodeTable, nbSeq, LL_defaultNorm, LL_defaultNormLog, MaxLL,
prevEntropy->fse.litlengthCTable, sizeof(prevEntropy->fse.litlengthCTable),
workspace, wkspSize);
{ size_t const countSize = ZSTD_buildCTable(
op, (size_t)(oend - op),
CTable_LitLength, LLFSELog, (symbolEncodingType_e)LLtype,
count, max, llCodeTable, nbSeq,
LL_defaultNorm, LL_defaultNormLog, MaxLL,
prevEntropy->fse.litlengthCTable,
sizeof(prevEntropy->fse.litlengthCTable),
entropyWorkspace, entropyWkspSize);
FORWARD_IF_ERROR(countSize);
if (LLtype == set_compressed)
lastNCount = op;
@ -2051,7 +2068,8 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
} }
/* build CTable for Offsets */
{ unsigned max = MaxOff;
size_t const mostFrequent = HIST_countFast_wksp(count, &max, ofCodeTable, nbSeq, workspace, wkspSize); /* can't fail */
size_t const mostFrequent = HIST_countFast_wksp(
count, &max, ofCodeTable, nbSeq, entropyWorkspace, entropyWkspSize); /* can't fail */
/* We can only use the basic table if max <= DefaultMaxOff, otherwise the offsets are too large */
ZSTD_defaultPolicy_e const defaultPolicy = (max <= DefaultMaxOff) ? ZSTD_defaultAllowed : ZSTD_defaultDisallowed;
DEBUGLOG(5, "Building OF table");
@ -2062,10 +2080,14 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
OF_defaultNorm, OF_defaultNormLog,
defaultPolicy, strategy);
assert(!(Offtype < set_compressed && nextEntropy->fse.offcode_repeatMode != FSE_repeat_none)); /* We don't copy tables */
{ size_t const countSize = ZSTD_buildCTable(op, (size_t)(oend - op), CTable_OffsetBits, OffFSELog, (symbolEncodingType_e)Offtype,
count, max, ofCodeTable, nbSeq, OF_defaultNorm, OF_defaultNormLog, DefaultMaxOff,
prevEntropy->fse.offcodeCTable, sizeof(prevEntropy->fse.offcodeCTable),
workspace, wkspSize);
{ size_t const countSize = ZSTD_buildCTable(
op, (size_t)(oend - op),
CTable_OffsetBits, OffFSELog, (symbolEncodingType_e)Offtype,
count, max, ofCodeTable, nbSeq,
OF_defaultNorm, OF_defaultNormLog, DefaultMaxOff,
prevEntropy->fse.offcodeCTable,
sizeof(prevEntropy->fse.offcodeCTable),
entropyWorkspace, entropyWkspSize);
FORWARD_IF_ERROR(countSize);
if (Offtype == set_compressed)
lastNCount = op;
@ -2074,7 +2096,8 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
} }
/* build CTable for MatchLengths */
{ unsigned max = MaxML;
size_t const mostFrequent = HIST_countFast_wksp(count, &max, mlCodeTable, nbSeq, workspace, wkspSize); /* can't fail */
size_t const mostFrequent = HIST_countFast_wksp(
count, &max, mlCodeTable, nbSeq, entropyWorkspace, entropyWkspSize); /* can't fail */
DEBUGLOG(5, "Building ML table (remaining space : %i)", (int)(oend-op));
nextEntropy->fse.matchlength_repeatMode = prevEntropy->fse.matchlength_repeatMode;
MLtype = ZSTD_selectEncodingType(&nextEntropy->fse.matchlength_repeatMode,
@ -2083,10 +2106,14 @@ ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
ML_defaultNorm, ML_defaultNormLog,
ZSTD_defaultAllowed, strategy);
assert(!(MLtype < set_compressed && nextEntropy->fse.matchlength_repeatMode != FSE_repeat_none)); /* We don't copy tables */
{ size_t const countSize = ZSTD_buildCTable(op, (size_t)(oend - op), CTable_MatchLength, MLFSELog, (symbolEncodingType_e)MLtype,
count, max, mlCodeTable, nbSeq, ML_defaultNorm, ML_defaultNormLog, MaxML,
prevEntropy->fse.matchlengthCTable, sizeof(prevEntropy->fse.matchlengthCTable),
workspace, wkspSize);
{ size_t const countSize = ZSTD_buildCTable(
op, (size_t)(oend - op),
CTable_MatchLength, MLFSELog, (symbolEncodingType_e)MLtype,
count, max, mlCodeTable, nbSeq,
ML_defaultNorm, ML_defaultNormLog, MaxML,
prevEntropy->fse.matchlengthCTable,
sizeof(prevEntropy->fse.matchlengthCTable),
entropyWorkspace, entropyWkspSize);
FORWARD_IF_ERROR(countSize);
if (MLtype == set_compressed)
lastNCount = op;
@ -2134,13 +2161,13 @@ ZSTD_compressSequences(seqStore_t* seqStorePtr,
const ZSTD_CCtx_params* cctxParams,
void* dst, size_t dstCapacity,
size_t srcSize,
void* workspace, size_t wkspSize,
void* entropyWorkspace, size_t entropyWkspSize,
int bmi2)
{
size_t const cSize = ZSTD_compressSequences_internal(
seqStorePtr, prevEntropy, nextEntropy, cctxParams,
dst, dstCapacity,
workspace, wkspSize, bmi2);
entropyWorkspace, entropyWkspSize, bmi2);
if (cSize == 0) return 0;
/* When srcSize <= dstCapacity, there is enough space to write a raw uncompressed block.
* Since we ran out of space, block must be not compressible, so fall back to raw uncompressed block.
@ -2380,6 +2407,7 @@ static void ZSTD_overflowCorrectIfNeeded(ZSTD_matchState_t* ms, ZSTD_CCtx_params
}
}
/*! ZSTD_compress_frameChunk() :
* Compress a chunk of data into one or multiple blocks.
* All blocks will be terminated, all input will be consumed.
@ -2848,7 +2876,8 @@ static size_t ZSTD_compressBegin_internal(ZSTD_CCtx* cctx,
ZSTDcrp_continue, zbuff) );
{ size_t const dictID = ZSTD_compress_insertDictionary(
cctx->blockState.prevCBlock, &cctx->blockState.matchState,
params, dict, dictSize, dictContentType, dtlm, cctx->entropyWorkspace);
params, dict, dictSize, dictContentType, dtlm,
cctx->entropyWorkspace);
FORWARD_IF_ERROR(dictID);
assert(dictID <= UINT_MAX);
cctx->dictID = (U32)dictID;
@ -3063,7 +3092,7 @@ size_t ZSTD_estimateCDictSize_advanced(
{
DEBUGLOG(5, "sizeof(ZSTD_CDict) : %u", (unsigned)sizeof(ZSTD_CDict));
return sizeof(ZSTD_CDict) + HUF_WORKSPACE_SIZE + ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 0)
+ (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize);
+ (dictLoadMethod == ZSTD_dlm_byRef ? 0 : ZSTD_cwksp_align(dictSize, sizeof(void *)));
}
size_t ZSTD_estimateCDictSize(size_t dictSize, int compressionLevel)
@ -3076,7 +3105,9 @@ size_t ZSTD_sizeof_CDict(const ZSTD_CDict* cdict)
{
if (cdict==NULL) return 0; /* support sizeof on NULL */
DEBUGLOG(5, "sizeof(*cdict) : %u", (unsigned)sizeof(*cdict));
return cdict->workspaceSize + (cdict->dictBuffer ? cdict->dictContentSize : 0) + sizeof(*cdict);
/* cdict may be in the workspace */
return (cdict->workspace.workspace == cdict ? 0 : sizeof(*cdict))
+ ZSTD_cwksp_sizeof(&cdict->workspace);
}
static size_t ZSTD_initCDict_internal(
@ -3090,26 +3121,25 @@ static size_t ZSTD_initCDict_internal(
assert(!ZSTD_checkCParams(cParams));
cdict->matchState.cParams = cParams;
if ((dictLoadMethod == ZSTD_dlm_byRef) || (!dictBuffer) || (!dictSize)) {
cdict->dictBuffer = NULL;
cdict->dictContent = dictBuffer;
} else {
void* const internalBuffer = ZSTD_malloc(dictSize, cdict->customMem);
cdict->dictBuffer = internalBuffer;
cdict->dictContent = internalBuffer;
void *internalBuffer = ZSTD_cwksp_reserve_object(&cdict->workspace, ZSTD_cwksp_align(dictSize, sizeof(void*)));
RETURN_ERROR_IF(!internalBuffer, memory_allocation);
cdict->dictContent = internalBuffer;
memcpy(internalBuffer, dictBuffer, dictSize);
}
cdict->dictContentSize = dictSize;
cdict->entropyWorkspace = (U32*)ZSTD_cwksp_reserve_object(&cdict->workspace, HUF_WORKSPACE_SIZE);
/* Reset the state to no dictionary */
ZSTD_reset_compressedBlockState(&cdict->cBlockState);
{ void* const end = ZSTD_reset_matchState(&cdict->matchState,
(U32*)cdict->workspace + HUF_WORKSPACE_SIZE_U32,
&cParams,
ZSTDcrp_continue, ZSTD_resetTarget_CDict);
assert(end == (char*)cdict->workspace + cdict->workspaceSize);
(void)end;
}
FORWARD_IF_ERROR(ZSTD_reset_matchState(
&cdict->matchState,
&cdict->workspace,
&cParams,
ZSTDcrp_continue, ZSTD_resetTarget_CDict));
/* (Maybe) load the dictionary
* Skips loading the dictionary if it is <= 8 bytes.
*/
@ -3121,7 +3151,7 @@ static size_t ZSTD_initCDict_internal(
{ size_t const dictID = ZSTD_compress_insertDictionary(
&cdict->cBlockState, &cdict->matchState, &params,
cdict->dictContent, cdict->dictContentSize,
dictContentType, ZSTD_dtlm_full, cdict->workspace);
dictContentType, ZSTD_dtlm_full, cdict->entropyWorkspace);
FORWARD_IF_ERROR(dictID);
assert(dictID <= (size_t)(U32)-1);
cdict->dictID = (U32)dictID;
@ -3139,18 +3169,27 @@ ZSTD_CDict* ZSTD_createCDict_advanced(const void* dictBuffer, size_t dictSize,
DEBUGLOG(3, "ZSTD_createCDict_advanced, mode %u", (unsigned)dictContentType);
if (!customMem.customAlloc ^ !customMem.customFree) return NULL;
{ ZSTD_CDict* const cdict = (ZSTD_CDict*)ZSTD_malloc(sizeof(ZSTD_CDict), customMem);
size_t const workspaceSize = HUF_WORKSPACE_SIZE + ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 0);
{ size_t const workspaceSize =
sizeof(ZSTD_CDict) +
HUF_WORKSPACE_SIZE +
ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 0) +
(dictLoadMethod == ZSTD_dlm_byRef ? 0
: ZSTD_cwksp_align(dictSize, sizeof(void*)));
void* const workspace = ZSTD_malloc(workspaceSize, customMem);
ZSTD_cwksp ws;
ZSTD_CDict* cdict;
if (!cdict || !workspace) {
ZSTD_free(cdict, customMem);
if (!workspace) {
ZSTD_free(workspace, customMem);
return NULL;
}
ZSTD_cwksp_init(&ws, workspace, workspaceSize);
cdict = (ZSTD_CDict*)ZSTD_cwksp_reserve_object(&ws, sizeof(ZSTD_CDict));
assert(cdict != NULL);
ZSTD_cwksp_move(&cdict->workspace, &ws);
cdict->customMem = customMem;
cdict->workspace = workspace;
cdict->workspaceSize = workspaceSize;
if (ZSTD_isError( ZSTD_initCDict_internal(cdict,
dictBuffer, dictSize,
dictLoadMethod, dictContentType,
@ -3183,8 +3222,11 @@ size_t ZSTD_freeCDict(ZSTD_CDict* cdict)
{
if (cdict==NULL) return 0; /* support free on NULL */
{ ZSTD_customMem const cMem = cdict->customMem;
ZSTD_free(cdict->workspace, cMem);
ZSTD_free(cdict->dictBuffer, cMem);
/* Only free workspace if cdict not in workspace, otherwise the
* workspace will be freed when the cdict itself is freed. */
if ((void*)cdict->workspace.workspace != (void*)cdict) {
ZSTD_cwksp_free(&cdict->workspace, cMem);
}
ZSTD_free(cdict, cMem);
return 0;
}
@ -3211,28 +3253,27 @@ const ZSTD_CDict* ZSTD_initStaticCDict(
ZSTD_compressionParameters cParams)
{
size_t const matchStateSize = ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 0);
size_t const neededSize = sizeof(ZSTD_CDict) + (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize)
size_t const neededSize = sizeof(ZSTD_CDict) + (dictLoadMethod == ZSTD_dlm_byRef ? 0 : ZSTD_cwksp_align(dictSize, sizeof(void*)))
+ HUF_WORKSPACE_SIZE + matchStateSize;
ZSTD_CDict* const cdict = (ZSTD_CDict*) workspace;
void* ptr;
ZSTD_CDict* cdict;
if ((size_t)workspace & 7) return NULL; /* 8-aligned */
{
ZSTD_cwksp ws;
ZSTD_cwksp_init(&ws, workspace, workspaceSize);
cdict = (ZSTD_CDict*)ZSTD_cwksp_reserve_object(&ws, sizeof(ZSTD_CDict));
if (cdict == NULL) return NULL;
ZSTD_cwksp_move(&cdict->workspace, &ws);
}
DEBUGLOG(4, "(workspaceSize < neededSize) : (%u < %u) => %u",
(unsigned)workspaceSize, (unsigned)neededSize, (unsigned)(workspaceSize < neededSize));
if (workspaceSize < neededSize) return NULL;
if (dictLoadMethod == ZSTD_dlm_byCopy) {
memcpy(cdict+1, dict, dictSize);
dict = cdict+1;
ptr = (char*)workspace + sizeof(ZSTD_CDict) + dictSize;
} else {
ptr = cdict+1;
}
cdict->workspace = ptr;
cdict->workspaceSize = HUF_WORKSPACE_SIZE + matchStateSize;
if (ZSTD_isError( ZSTD_initCDict_internal(cdict,
dict, dictSize,
ZSTD_dlm_byRef, dictContentType,
dictLoadMethod, dictContentType,
cParams) ))
return NULL;
@ -3393,7 +3434,8 @@ size_t ZSTD_resetCStream(ZSTD_CStream* zcs, unsigned long long pss)
* Assumption 2 : either dict, or cdict, is defined, not both */
size_t ZSTD_initCStream_internal(ZSTD_CStream* zcs,
const void* dict, size_t dictSize, const ZSTD_CDict* cdict,
const ZSTD_CCtx_params* params, unsigned long long pledgedSrcSize)
const ZSTD_CCtx_params* params,
unsigned long long pledgedSrcSize)
{
DEBUGLOG(4, "ZSTD_initCStream_internal");
FORWARD_IF_ERROR( ZSTD_CCtx_reset(zcs, ZSTD_reset_session_only) );

5
lib/compress/zstd_compress_internal.h
View File

@ -19,6 +19,7 @@
* Dependencies
***************************************/
#include "zstd_internal.h"
#include "zstd_cwksp.h"
#ifdef ZSTD_MULTITHREAD
# include "zstdmt_compress.h"
#endif
@ -231,9 +232,7 @@ struct ZSTD_CCtx_s {
ZSTD_CCtx_params appliedParams;
U32 dictID;
int workSpaceOversizedDuration;
void* workSpace;
size_t workSpaceSize;
ZSTD_cwksp workspace; /* manages buffer for dynamic allocations */
size_t blockSize;
unsigned long long pledgedSrcSizePlusOne; /* this way, 0 (default) == unknown */
unsigned long long consumedSrcSize;

15
lib/compress/zstd_compress_literals.c
View File

@ -70,7 +70,7 @@ size_t ZSTD_compressLiterals (ZSTD_hufCTables_t const* prevHuf,
ZSTD_strategy strategy, int disableLiteralCompression,
void* dst, size_t dstCapacity,
const void* src, size_t srcSize,
void* workspace, size_t wkspSize,
void* entropyWorkspace, size_t entropyWorkspaceSize,
const int bmi2)
{
size_t const minGain = ZSTD_minGain(srcSize, strategy);
@ -99,10 +99,15 @@ size_t ZSTD_compressLiterals (ZSTD_hufCTables_t const* prevHuf,
{ HUF_repeat repeat = prevHuf->repeatMode;
int const preferRepeat = strategy < ZSTD_lazy ? srcSize <= 1024 : 0;
if (repeat == HUF_repeat_valid && lhSize == 3) singleStream = 1;
cLitSize = singleStream ? HUF_compress1X_repeat(ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 11,
workspace, wkspSize, (HUF_CElt*)nextHuf->CTable, &repeat, preferRepeat, bmi2)
: HUF_compress4X_repeat(ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 11,
workspace, wkspSize, (HUF_CElt*)nextHuf->CTable, &repeat, preferRepeat, bmi2);
cLitSize = singleStream ?
HUF_compress1X_repeat(
ostart+lhSize, dstCapacity-lhSize, src, srcSize,
255, 11, entropyWorkspace, entropyWorkspaceSize,
(HUF_CElt*)nextHuf->CTable, &repeat, preferRepeat, bmi2) :
HUF_compress4X_repeat(
ostart+lhSize, dstCapacity-lhSize, src, srcSize,
255, 11, entropyWorkspace, entropyWorkspaceSize,
(HUF_CElt*)nextHuf->CTable, &repeat, preferRepeat, bmi2);
if (repeat != HUF_repeat_none) {
/* reused the existing table */
hType = set_repeat;

2
lib/compress/zstd_compress_literals.h
View File

@ -23,7 +23,7 @@ size_t ZSTD_compressLiterals (ZSTD_hufCTables_t const* prevHuf,
ZSTD_strategy strategy, int disableLiteralCompression,
void* dst, size_t dstCapacity,
const void* src, size_t srcSize,
void* workspace, size_t wkspSize,
void* entropyWorkspace, size_t entropyWorkspaceSize,
const int bmi2);
#endif /* ZSTD_COMPRESS_LITERALS_H */

6
lib/compress/zstd_compress_sequences.c
View File

@ -222,7 +222,7 @@ ZSTD_buildCTable(void* dst, size_t dstCapacity,
const BYTE* codeTable, size_t nbSeq,
const S16* defaultNorm, U32 defaultNormLog, U32 defaultMax,
const FSE_CTable* prevCTable, size_t prevCTableSize,
void* workspace, size_t workspaceSize)
void* entropyWorkspace, size_t entropyWorkspaceSize)
{
BYTE* op = (BYTE*)dst;
const BYTE* const oend = op + dstCapacity;
@ -238,7 +238,7 @@ ZSTD_buildCTable(void* dst, size_t dstCapacity,
memcpy(nextCTable, prevCTable, prevCTableSize);
return 0;
case set_basic:
FORWARD_IF_ERROR(FSE_buildCTable_wksp(nextCTable, defaultNorm, defaultMax, defaultNormLog, workspace, workspaceSize)); /* note : could be pre-calculated */
FORWARD_IF_ERROR(FSE_buildCTable_wksp(nextCTable, defaultNorm, defaultMax, defaultNormLog, entropyWorkspace, entropyWorkspaceSize)); /* note : could be pre-calculated */
return 0;
case set_compressed: {
S16 norm[MaxSeq + 1];
@ -252,7 +252,7 @@ ZSTD_buildCTable(void* dst, size_t dstCapacity,
FORWARD_IF_ERROR(FSE_normalizeCount(norm, tableLog, count, nbSeq_1, max));
{ size_t const NCountSize = FSE_writeNCount(op, oend - op, norm, max, tableLog); /* overflow protected */
FORWARD_IF_ERROR(NCountSize);
FORWARD_IF_ERROR(FSE_buildCTable_wksp(nextCTable, norm, max, tableLog, workspace, workspaceSize));
FORWARD_IF_ERROR(FSE_buildCTable_wksp(nextCTable, norm, max, tableLog, entropyWorkspace, entropyWorkspaceSize));
return NCountSize;
}
}

2
lib/compress/zstd_compress_sequences.h
View File

@ -35,7 +35,7 @@ ZSTD_buildCTable(void* dst, size_t dstCapacity,
const BYTE* codeTable, size_t nbSeq,
const S16* defaultNorm, U32 defaultNormLog, U32 defaultMax,
const FSE_CTable* prevCTable, size_t prevCTableSize,
void* workspace, size_t workspaceSize);
void* entropyWorkspace, size_t entropyWorkspaceSize);
size_t ZSTD_encodeSequences(
void* dst, size_t dstCapacity,

369
lib/compress/zstd_cwksp.h Normal file
View File

@ -0,0 +1,369 @@
/*
* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
#ifndef ZSTD_CWKSP_H
#define ZSTD_CWKSP_H
/*-*************************************
* Dependencies
***************************************/
#include "zstd_internal.h"
#if defined (__cplusplus)
extern "C" {
#endif
/*-*************************************
* Constants
***************************************/
/* define "workspace is too large" as this number of times larger than needed */
#define ZSTD_WORKSPACETOOLARGE_FACTOR 3
/* when workspace is continuously too large
* during at least this number of times,
* context's memory usage is considered wasteful,
* because it's sized to handle a worst case scenario which rarely happens.
* In which case, resize it down to free some memory */
#define ZSTD_WORKSPACETOOLARGE_MAXDURATION 128
/*-*************************************
* Structures
***************************************/
typedef enum {
ZSTD_cwksp_alloc_objects,
ZSTD_cwksp_alloc_buffers,
ZSTD_cwksp_alloc_aligned
} ZSTD_cwksp_alloc_phase_e;
/**
* Zstd fits all its internal datastructures into a single continuous buffer,
* so that it only needs to perform a single OS allocation (or so that a buffer
* can be provided to it and it can perform no allocations at all). This buffer
* is called the workspace.
*
* Several optimizations complicate that process of allocating memory ranges
* from this workspace for each internal datastructure:
*
* - These different internal datastructures have different setup requirements:
*
* - The static objects need to be cleared once and can then be trivially
* reused for each compression.
*
* - Various buffers don't need to be initialized at all--they are always
* written into before they're read.
*
* - The matchstate tables have a unique requirement that they don't need
* their memory to be totally cleared, but they do need the memory to have
* some bound, i.e., a guarantee that all values in the memory they've been
* allocated is less than some maximum value (which is the starting value
* for the indices that they will then use for compression). When this
* guarantee is provided to them, they can use the memory without any setup
* work. When it can't, they have to clear the area.
*
* - These buffers also have different alignment requirements.
*
* - We would like to reuse the objects in the workspace for multiple
* compressions without having to perform any expensive reallocation or
* reinitialization work.
*
* - We would like to be able to efficiently reuse the workspace across
* multiple compressions **even when the compression parameters change** and
* we need to resize some of the objects (where possible).
*
* To attempt to manage this buffer, given these constraints, the ZSTD_cwksp
* abstraction was created. It works as follows:
*
* Workspace Layout:
*
* [ ... workspace ... ]
* [objects][tables ... ->] free space [<- ... aligned][<- ... buffers]
*
* The various objects that live in the workspace are divided into the
* following categories, and are allocated separately:
*
* - Static objects: this is optionally the enclosing ZSTD_CCtx or ZSTD_CDict,
* so that literally everything fits in a single buffer. Note: if present,
* this must be the first object in the workspace, since ZSTD_free{CCtx,
* CDict}() rely on a pointer comparison to see whether one or two frees are
* required.
*
* - Fixed size objects: these are fixed-size, fixed-count objects that are
* nonetheless "dynamically" allocated in the workspace so that we can
* control how they're initialized separately from the broader ZSTD_CCtx.
* Examples:
* - Entropy Workspace
* - 2 x ZSTD_compressedBlockState_t
* - CDict dictionary contents
*
* - Tables: these are any of several different datastructures (hash tables,
* chain tables, binary trees) that all respect a common format: they are
* uint32_t arrays, all of whose values are between 0 and (nextSrc - base).
* Their sizes depend on the cparams.
*
* - Aligned: these buffers are used for various purposes that require 4 byte
* alignment, but don't require any initialization before they're used.
*
* - Buffers: these buffers are used for various purposes that don't require
* any alignment or initialization before they're used. This means they can
* be moved around at no cost for a new compression.
*
* Allocating Memory:
*
* The various types of objects must be allocated in order, so they can be
* correctly packed into the workspace buffer. That order is:
*
* 1. Objects
* 2. Buffers
* 3. Aligned
* 4. Tables
*
* Attempts to reserve objects of different types out of order will fail.
*/
typedef struct {
void* workspace;
void* workspaceEnd;
void* objectEnd;
void* tableEnd;
void* allocStart;
int allocFailed;
int workspaceOversizedDuration;
ZSTD_cwksp_alloc_phase_e phase;
} ZSTD_cwksp;
/*-*************************************
* Functions
***************************************/
MEM_STATIC size_t ZSTD_cwksp_available_space(ZSTD_cwksp* ws);
/**
* Align must be a power of 2.
*/
MEM_STATIC size_t ZSTD_cwksp_align(size_t size, size_t const align) {
size_t const mask = align - 1;
assert((align & mask) == 0);
return (size + mask) & ~mask;
}
MEM_STATIC void ZSTD_cwksp_internal_advance_phase(
ZSTD_cwksp* ws, ZSTD_cwksp_alloc_phase_e phase) {
assert(phase >= ws->phase);
if (phase > ws->phase) {
if (ws->phase < ZSTD_cwksp_alloc_buffers &&
phase >= ZSTD_cwksp_alloc_buffers) {
}
if (ws->phase < ZSTD_cwksp_alloc_aligned &&
phase >= ZSTD_cwksp_alloc_aligned) {
/* If unaligned allocations down from a too-large top have left us
* unaligned, we need to realign our alloc ptr. Technically, this
* can consume space that is unaccounted for in the neededSpace
* calculation. However, I believe this can only happen when the
* workspace is too large, and specifically when it is too large
* by a larger margin than the space that will be consumed. */
/* TODO: cleaner, compiler warning friendly way to do this??? */
ws->allocStart = (BYTE*)ws->allocStart - ((size_t)ws->allocStart & (sizeof(U32)-1));
}
ws->phase = phase;
}
}
/**
* Internal function. Do not use directly.
*/
MEM_STATIC void* ZSTD_cwksp_reserve_internal(
ZSTD_cwksp* ws, size_t bytes, ZSTD_cwksp_alloc_phase_e phase) {
void* alloc;
void* bottom = ws->tableEnd;
ZSTD_cwksp_internal_advance_phase(ws, phase);
alloc = (BYTE *)ws->allocStart - bytes;
DEBUGLOG(4, "cwksp: reserving %zd bytes, %zd bytes remaining",
bytes, ZSTD_cwksp_available_space(ws) - bytes);
assert(alloc >= bottom);
if (alloc < bottom) {
ws->allocFailed = 1;
return NULL;
}
ws->allocStart = alloc;
return alloc;
}
/**
* Reserves and returns unaligned memory.
*/
MEM_STATIC BYTE* ZSTD_cwksp_reserve_buffer(ZSTD_cwksp* ws, size_t bytes) {
return (BYTE*)ZSTD_cwksp_reserve_internal(ws, bytes, ZSTD_cwksp_alloc_buffers);
}
/**
* Reserves and returns memory sized on and aligned on sizeof(unsigned).
*/
MEM_STATIC void* ZSTD_cwksp_reserve_aligned(ZSTD_cwksp* ws, size_t bytes) {
assert((bytes & (sizeof(U32)-1)) == 0);
return ZSTD_cwksp_reserve_internal(ws, ZSTD_cwksp_align(bytes, sizeof(U32)), ZSTD_cwksp_alloc_aligned);
}
/**
* Aligned on sizeof(unsigned). These buffers have the special property that
* their values remain constrained, allowing us to re-use them without
* memset()-ing them.
*/
MEM_STATIC void* ZSTD_cwksp_reserve_table(ZSTD_cwksp* ws, size_t bytes) {
const ZSTD_cwksp_alloc_phase_e phase = ZSTD_cwksp_alloc_aligned;
void* alloc = ws->tableEnd;
void* end = (BYTE *)alloc + bytes;
void* top = ws->allocStart;
DEBUGLOG(4, "cwksp: reserving table %zd bytes, %zd bytes remaining",
bytes, ZSTD_cwksp_available_space(ws) - bytes);
assert((bytes & (sizeof(U32)-1)) == 0);
ZSTD_cwksp_internal_advance_phase(ws, phase);
assert(end <= top);
if (end > top) {
DEBUGLOG(4, "cwksp: object alloc failed!");
ws->allocFailed = 1;
return NULL;
}
ws->tableEnd = end;
return alloc;
}
/**
* Aligned on sizeof(void*).
*/
MEM_STATIC void* ZSTD_cwksp_reserve_object(ZSTD_cwksp* ws, size_t bytes) {
size_t roundedBytes = ZSTD_cwksp_align(bytes, sizeof(void*));
void* start = ws->objectEnd;
void* end = (BYTE*)start + roundedBytes;
DEBUGLOG(4,
"cwksp: reserving object %zd bytes (rounded to %zd), %zd bytes remaining",
bytes, roundedBytes, ZSTD_cwksp_available_space(ws) - roundedBytes);
assert(((size_t)start & (sizeof(void*)-1)) == 0);
assert((bytes & (sizeof(void*)-1)) == 0);
/* we must be in the first phase, no advance is possible */
if (ws->phase != ZSTD_cwksp_alloc_objects || end > ws->workspaceEnd) {
DEBUGLOG(4, "cwksp: object alloc failed!");
ws->allocFailed = 1;
return NULL;
}
ws->objectEnd = end;
ws->tableEnd = end;
return start;
}
/**
* Invalidates table allocations.
* All other allocations remain valid.
*/
MEM_STATIC void ZSTD_cwksp_clear_tables(ZSTD_cwksp* ws) {
DEBUGLOG(4, "cwksp: clearing tables!");
ws->tableEnd = ws->objectEnd;
}
/**
* Invalidates all buffer, aligned, and table allocations.
* Object allocations remain valid.
*/
MEM_STATIC void ZSTD_cwksp_clear(ZSTD_cwksp* ws) {
DEBUGLOG(4, "cwksp: clearing!");
ws->tableEnd = ws->objectEnd;
ws->allocStart = ws->workspaceEnd;
ws->allocFailed = 0;
if (ws->phase > ZSTD_cwksp_alloc_buffers) {
ws->phase = ZSTD_cwksp_alloc_buffers;
}
}
/**
* The provided workspace takes ownership of the buffer [start, start+size).
* Any existing values in the workspace are ignored (the previously managed
* buffer, if present, must be separately freed).
*/
MEM_STATIC void ZSTD_cwksp_init(ZSTD_cwksp* ws, void* start, size_t size) {
DEBUGLOG(4, "cwksp: init'ing workspace with %zd bytes", size);
assert(((size_t)start & (sizeof(void*)-1)) == 0); /* ensure correct alignment */
ws->workspace = start;
ws->workspaceEnd = (BYTE*)start + size;
ws->objectEnd = ws->workspace;
ws->phase = ZSTD_cwksp_alloc_objects;
ZSTD_cwksp_clear(ws);
ws->workspaceOversizedDuration = 0;
}
MEM_STATIC size_t ZSTD_cwksp_create(ZSTD_cwksp* ws, size_t size, ZSTD_customMem customMem) {
void* workspace = ZSTD_malloc(size, customMem);
DEBUGLOG(4, "cwksp: creating new workspace with %zd bytes", size);
RETURN_ERROR_IF(workspace == NULL, memory_allocation);
ZSTD_cwksp_init(ws, workspace, size);
return 0;
}
MEM_STATIC void ZSTD_cwksp_free(ZSTD_cwksp* ws, ZSTD_customMem customMem) {
DEBUGLOG(4, "cwksp: freeing workspace");
ZSTD_free(ws->workspace, customMem);
ws->workspace = NULL;
ws->workspaceEnd = NULL;
ZSTD_cwksp_clear(ws);
}
/**
* Moves the management of a workspace from one cwksp to another. The src cwksp
* is left in an invalid state (src must be re-init()'ed before its used again).
*/
MEM_STATIC void ZSTD_cwksp_move(ZSTD_cwksp* dst, ZSTD_cwksp* src) {
*dst = *src;
memset(src, 0, sizeof(ZSTD_cwksp));
}
MEM_STATIC size_t ZSTD_cwksp_sizeof(const ZSTD_cwksp* ws) {
return (BYTE*)ws->workspaceEnd - (BYTE*)ws->workspace;
}
MEM_STATIC int ZSTD_cwksp_reserve_failed(const ZSTD_cwksp* ws) {
return ws->allocFailed;
}
/*-*************************************
* Functions Checking Free Space
***************************************/
MEM_STATIC size_t ZSTD_cwksp_available_space(ZSTD_cwksp* ws) {
return (size_t)((BYTE*)ws->allocStart - (BYTE*)ws->tableEnd);
}
MEM_STATIC int ZSTD_cwksp_check_available(ZSTD_cwksp* ws, size_t additionalNeededSpace) {
return ZSTD_cwksp_available_space(ws) >= additionalNeededSpace;
}
MEM_STATIC int ZSTD_cwksp_check_too_large(ZSTD_cwksp* ws, size_t additionalNeededSpace) {
return ZSTD_cwksp_check_available(
ws, additionalNeededSpace * ZSTD_WORKSPACETOOLARGE_FACTOR);
}
MEM_STATIC int ZSTD_cwksp_check_wasteful(ZSTD_cwksp* ws, size_t additionalNeededSpace) {
return ZSTD_cwksp_check_too_large(ws, additionalNeededSpace)
&& ws->workspaceOversizedDuration > ZSTD_WORKSPACETOOLARGE_MAXDURATION;
}
MEM_STATIC void ZSTD_cwksp_bump_oversized_duration(
ZSTD_cwksp* ws, size_t additionalNeededSpace) {
if (ZSTD_cwksp_check_too_large(ws, additionalNeededSpace)) {
ws->workspaceOversizedDuration++;
} else {
ws->workspaceOversizedDuration = 0;
}
}
#if defined (__cplusplus)
}
#endif
#endif /* ZSTD_CWKSP_H */