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Add option to use logical cores for default threads

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This commit is contained in:
Binh Vo
2021-06-16 09:38:43 -04:00
parent 0152435ab0
commit 6a46e38deb
5 changed files with 123 additions and 47 deletions
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22
programs/zstdcli.c
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@ -213,6 +213,7 @@ static void usage_advanced(const char* programName)
DISPLAYOUT( " -T# : spawns # compression threads (default: 1, 0==# cores) \n");
DISPLAYOUT( " -B# : select size of each job (default: 0==automatic) \n");
DISPLAYOUT( "--single-thread : use a single thread for both I/O and compression (result slightly different than -T1) \n");
DISPLAYOUT( "--auto-threads={physical,logical} (default: physical} : use either physical cores or logical cores as default when specifying -T0 \n");
DISPLAYOUT( "--rsyncable : compress using a rsync-friendly method (-B sets block size) \n");
# endif
DISPLAYOUT( "--exclude-compressed: only compress files that are not already compressed \n");
@ -761,6 +762,9 @@ int main(int const argCount, const char* argv[])
separateFiles = 0,
setRealTimePrio = 0,
singleThread = 0,
#ifdef ZSTD_MULTITHREAD
defaultLogicalCores = 0,
#endif
showDefaultCParams = 0,
ultra=0,
contentSize=1;
@ -950,6 +954,15 @@ int main(int const argCount, const char* argv[])
if (longCommandWArg(&argument, "--target-compressed-block-size=")) { targetCBlockSize = readSizeTFromChar(&argument); continue; }
if (longCommandWArg(&argument, "--size-hint=")) { srcSizeHint = readSizeTFromChar(&argument); continue; }
if (longCommandWArg(&argument, "--output-dir-flat")) { NEXT_FIELD(outDirName); continue; }
#ifdef ZSTD_MULTITHREAD
if (longCommandWArg(&argument, "--auto-threads")) {
const char* threadDefault = NULL;
NEXT_FIELD(threadDefault);
if (strcmp(threadDefault, "logical") == 0)
defaultLogicalCores = 1;
continue;
}
#endif
#ifdef UTIL_HAS_MIRRORFILELIST
if (longCommandWArg(&argument, "--output-dir-mirror")) { NEXT_FIELD(outMirroredDirName); continue; }
#endif
@ -1156,8 +1169,13 @@ int main(int const argCount, const char* argv[])
#ifdef ZSTD_MULTITHREAD
if ((nbWorkers==0) && (!singleThread)) {
/* automatically set # workers based on # of reported cpus */
nbWorkers = UTIL_countPhysicalCores();
DISPLAYLEVEL(3, "Note: %d physical core(s) detected \n", nbWorkers);
if (defaultLogicalCores) {
nbWorkers = UTIL_countLogicalCores();
DISPLAYLEVEL(3, "Note: %d logical core(s) detected \n", nbWorkers);
} else {
nbWorkers = UTIL_countPhysicalCores();
DISPLAYLEVEL(3, "Note: %d physical core(s) detected \n", nbWorkers);
}
}
#else
(void)singleThread; (void)nbWorkers;