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Add high-resolution timer logging of minor GC latency

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Justin Ethier 2020-01-20 15:00:22 -05:00
parent 206c5a0ded
commit c95b066b0a
1 changed files with 32 additions and 0 deletions
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32
runtime.c
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@ -99,6 +99,32 @@ void Cyc_check_bounds(void *data, const char *label, int len, int index)
/* END error checking */ /* END error checking */
#ifdef CYC_HIGH_RES_TIMERS
/* High resolution timers */
#include <sys/time.h>
long long hrt_get_current()
{
struct timeval tv;
gettimeofday(&tv, NULL); /* TODO: longer-term consider using clock_gettime instead */
long long jiffy = (tv.tv_sec)*1000000LL + tv.tv_usec;
return jiffy;
}
long long hrt_cmp_current(long long tstamp)
{
long long now = hrt_get_current();
return (now - tstamp);
}
void hrt_log_delta(long long tstamp)
{
long long delta = hrt_cmp_current(tstamp);
fprintf(stdout, "[%llu]\n", delta);
}
/* END High resolution timers */
#endif
/* These macros are hardcoded here to support functions in this module. */ /* These macros are hardcoded here to support functions in this module. */
#define closcall1(td, clo, a1) \ #define closcall1(td, clo, a1) \
if (obj_is_not_closure(clo)) { \ if (obj_is_not_closure(clo)) { \
@ -5951,9 +5977,15 @@ void GC(void *data, closure cont, object * args, int num_args)
char tmp; char tmp;
object low_limit = &tmp; // This is one end of the stack... object low_limit = &tmp; // This is one end of the stack...
object high_limit = ((gc_thread_data *) data)->stack_start; object high_limit = ((gc_thread_data *) data)->stack_start;
#ifdef CYC_HIGH_RES_TIMERS
long long tstamp = hrt_get_current();
#endif
int alloci = gc_minor(data, low_limit, high_limit, cont, args, num_args); int alloci = gc_minor(data, low_limit, high_limit, cont, args, num_args);
// Cooperate with the collector thread // Cooperate with the collector thread
gc_mut_cooperate((gc_thread_data *) data, alloci); gc_mut_cooperate((gc_thread_data *) data, alloci);
#ifdef CYC_HIGH_RES_TIMERS
hrt_log_delta(tstamp);
#endif
// Let it all go, Neo... // Let it all go, Neo...
longjmp(*(((gc_thread_data *) data)->jmp_start), 1); longjmp(*(((gc_thread_data *) data)->jmp_start), 1);
} }