diff options
| author | Chris Mason <clm@fb.com> | 2023-04-12 10:44:31 -0700 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2023-04-13 12:52:58 -0700 |
| commit | bad164cd303626007b2439010773b95ec16523c7 (patch) | |
| tree | 419ed0fe37c369b3baa69f774dcfed68391e58e8 | |
| parent | cebdd4ed05011946e80a162fa38c52e5df5b37e4 (diff) | |
| download | schbench-bad164cd303626007b2439010773b95ec16523c7.tar.gz | |
schbench: update the defaults
Signed-off-by: Chris Mason <clm@fb.com>
| -rw-r--r-- | schbench.c | 22 |
1 files changed, 14 insertions, 8 deletions
@@ -21,6 +21,7 @@ #include <math.h> #include <linux/futex.h> #include <sys/syscall.h> +#include <sys/sysinfo.h> #define PLAT_BITS 8 #define PLAT_VAL (1 << PLAT_BITS) @@ -34,9 +35,9 @@ #define USEC_PER_SEC (1000000) /* -m number of message threads */ -static int message_threads = 2; +static int message_threads = 1; /* -t number of workers per message thread */ -static int worker_threads = 16; +static int worker_threads = 0; /* -r seconds */ static int runtime = 30; /* -w seconds */ @@ -46,9 +47,9 @@ static int intervaltime = 10; /* -z seconds */ static int zerotime = 0; /* -f cache_footprint_kb */ -static unsigned long cache_footprint_kb = 1536; +static unsigned long cache_footprint_kb = 256; /* -n operations */ -static unsigned long operations = 1; +static unsigned long operations = 5; /* -a, bool */ static int autobench = 0; /* -A, int percentage busy */ @@ -122,11 +123,11 @@ static void print_usage(void) { fprintf(stderr, "schbench usage:\n" "\t-C (--calibrate): run our work loop and report on timing\n" - "\t-m (--message-threads): number of message threads (def: 2)\n" - "\t-t (--threads): worker threads per message thread (def: 16)\n" + "\t-m (--message-threads): number of message threads (def: 1)\n" + "\t-t (--threads): worker threads per message thread (def: num_cpus)\n" "\t-r (--runtime): How long to run before exiting (seconds, def: 30)\n" - "\t-F (--cache_footprint): cache footprint (kb, def: 6144)\n" - "\t-n (--operations): think time operations to perform (def: 1)\n" + "\t-F (--cache_footprint): cache footprint (kb, def: 256)\n" + "\t-n (--operations): think time operations to perform (def: 5)\n" "\t-a (--auto): grow thread count until latencies hurt (def: off)\n" "\t-A (--auto-rps): grow RPS until cpu utilization hits target (def: none)\n" "\t-p (--pipe): transfer size bytes to simulate a pipe test (def: 0)\n" @@ -1267,6 +1268,11 @@ int main(int ac, char **av) parse_options(ac, av); + if (worker_threads == 0) { + worker_threads = get_nprocs(); + fprintf(stderr, "setting worker threads to %d\n", worker_threads); + } + matrix_size = sqrt(cache_footprint_kb * 1024 / 3 / sizeof(unsigned long)); again: |