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Sample perf measurement with vppinfra perfmon
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#if 0 | |
clang \ | |
-g \ | |
-march=native \ | |
-O3 \ | |
-Isrc \ | |
-Llib/x86_64-linux-gnu \ | |
-Wl,-rpath ./lib/x86_64-linux-gnu \ | |
"$0" \ | |
-lvppinfra \ | |
&& exec ./a.out "$@" | |
exit | |
#endif | |
#define _GNU_SOURCE | |
#include <vppinfra/format.h> | |
#include <vppinfra/perfmon/perfmon.h> | |
#include <vppinfra/format_table.h> | |
u32 __clib_noinline * | |
test_fn (clib_perfmon_ctx_t *ctx, u32 *v, u32 x) | |
{ | |
clib_perfmon_enable (ctx); | |
vec_add1 (v, x); | |
clib_perfmon_disable (ctx); | |
return v; | |
} | |
int | |
main () | |
{ | |
clib_perfmon_ctx_t ctx = {}; | |
clib_error_t *err; | |
u32 *vec = 0; | |
clib_mem_init (0, 32 << 20); | |
ctx.debug = 1; | |
if ((err = clib_perfmon_init_by_bundle_name (&ctx, "default"))) | |
clib_panic ("%U", format_clib_error, err); | |
clib_perfmon_warmup (&ctx); | |
for (int i = 1; i < 32; i++) | |
{ | |
clib_perfmon_reset (&ctx); | |
vec = test_fn (&ctx, vec, i); | |
clib_perfmon_capture (&ctx, 1, "%u -> %u (alloc size %lu, grow %u)", | |
vec_len (vec) - 1, vec_len (vec), | |
clib_mem_size (vec_header (vec)), | |
_vec_find (vec)->grow_elts); | |
} | |
fformat (stdout, "%U\n", format_perfmon_bundle, &ctx); | |
clib_perfmon_free (&ctx); | |
return 0; | |
} |
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