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Merge pull request #3544 from facebook/seek_faster

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Improved seekable format ingestion speed for small frame size
This commit is contained in:
Yann Collet 2023-03-10 12:33:33 -08:00 committed by GitHub
commit 134d332b10
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 18 additions and 13 deletions
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2
contrib/seekable_format/examples/parallel_compression.c
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@ -25,7 +25,7 @@
#include "pool.h" // use zstd thread pool for demo
#include "zstd_seekable.h"
#include "../zstd_seekable.h"
static void* malloc_orDie(size_t size)
{

2
contrib/seekable_format/examples/parallel_processing.c
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@ -29,7 +29,7 @@
#include "pool.h" // use zstd thread pool for demo
#include "zstd_seekable.h"
#include "../zstd_seekable.h"
#define MIN(a, b) ((a) < (b) ? (a) : (b))

17
contrib/seekable_format/examples/seekable_compression.c
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@ -13,7 +13,7 @@
#define ZSTD_STATIC_LINKING_ONLY
#include <zstd.h> // presumes zstd library is installed
#include "zstd_seekable.h"
#include "../zstd_seekable.h"
static void* malloc_orDie(size_t size)
{
@ -112,20 +112,23 @@ static char* createOutFilename_orDie(const char* filename)
return (char*)outSpace;
}
int main(int argc, const char** argv) {
#define CLEVEL_DEFAULT 5
int main(int argc, const char** argv)
{
const char* const exeName = argv[0];
if (argc!=3) {
printf("wrong arguments\n");
printf("usage:\n");
printf("%s FILE FRAME_SIZE\n", exeName);
if (argc<3 || argc>4) {
printf("wrong arguments \n");
printf("usage: \n");
printf("%s FILE FRAME_SIZE [LEVEL] \n", exeName);
return 1;
}
{ const char* const inFileName = argv[1];
unsigned const frameSize = (unsigned)atoi(argv[2]);
int const cLevel = (argc==4) ? atoi(argv[3]) : CLEVEL_DEFAULT;
char* const outFileName = createOutFilename_orDie(inFileName);
compressFile_orDie(inFileName, outFileName, 5, frameSize);
compressFile_orDie(inFileName, outFileName, cLevel, frameSize);
free(outFileName);
}

2
contrib/seekable_format/examples/seekable_decompression.c
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@ -16,7 +16,7 @@
#include <zstd.h> // presumes zstd library is installed
#include <zstd_errors.h>
#include "zstd_seekable.h"
#include "../zstd_seekable.h"
#define MIN(a, b) ((a) < (b) ? (a) : (b))

2
contrib/seekable_format/tests/seekable_tests.c
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@ -4,7 +4,7 @@
#include <stdio.h>
#include <assert.h>
#include "zstd_seekable.h"
#include "../zstd_seekable.h"
/* Basic unit tests for zstd seekable format */
int main(int argc, const char** argv)

4
contrib/seekable_format/zstd_seekable.h
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@ -15,8 +15,8 @@ extern "C" {
#define ZSTD_SEEKABLE_MAXFRAMES 0x8000000U
/* Limit the maximum size to avoid any potential issues storing the compressed size */
#define ZSTD_SEEKABLE_MAX_FRAME_DECOMPRESSED_SIZE 0x80000000U
/* Limit maximum size to avoid potential issues storing the compressed size */
#define ZSTD_SEEKABLE_MAX_FRAME_DECOMPRESSED_SIZE 0x40000000U
/*-****************************************************************************
* Seekable Format

2
contrib/seekable_format/zstdseek_compress.c
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@ -230,6 +230,8 @@ size_t ZSTD_seekable_compressStream(ZSTD_seekable_CStream* zcs, ZSTD_outBuffer*
const BYTE* const inBase = (const BYTE*) input->src + input->pos;
size_t inLen = input->size - input->pos;
assert(zcs->maxFrameSize < INT_MAX);
ZSTD_CCtx_setParameter(zcs->cstream, ZSTD_c_srcSizeHint, (int)zcs->maxFrameSize);
inLen = MIN(inLen, (size_t)(zcs->maxFrameSize - zcs->frameDSize));
/* if we haven't finished flushing the last frame, don't start writing a new one */