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/* We expect a timer to rarely go off, so benchmark that case:
* Every 1ms a connection comes in, we set up a 30 second timer for it.
* After 8192ms we finish the connection (and thus delete the timer).
*/
#include <ccan/timer/timer.h>
#include <ccan/opt/opt.h>
#include <ccan/array_size/array_size.h>
#include <stdio.h>
#define PER_CONN_TIME 8192
#define CONN_TIMEOUT_MS 30000
int main(int argc, char *argv[])
{
struct timespec start, curr;
struct timers timers;
struct list_head expired;
struct timer t[PER_CONN_TIME];
unsigned int i, num;
bool check = false;
opt_register_noarg("-c|--check", opt_set_bool, &check,
"Check timer structure during progress");
opt_parse(&argc, argv, opt_log_stderr_exit);
num = argv[1] ? atoi(argv[1]) : (check ? 100000 : 100000000);
list_head_init(&expired);
curr = start = time_now();
timers_init(&timers, start);
for (i = 0; i < num; i++) {
curr = time_add(curr, time_from_msec(1));
if (check)
timers_check(&timers, NULL);
if (timers_expire(&timers, curr))
abort();
if (check)
timers_check(&timers, NULL);
if (i >= PER_CONN_TIME) {
timer_del(&timers, &t[i%PER_CONN_TIME]);
if (check)
timers_check(&timers, NULL);
}
timer_add(&timers, &t[i%PER_CONN_TIME],
time_add(curr, time_from_msec(CONN_TIMEOUT_MS)));
if (check)
timers_check(&timers, NULL);
}
if (num > PER_CONN_TIME) {
for (i = 0; i < PER_CONN_TIME; i++)
timer_del(&timers, &t[i]);
}
curr = time_sub(time_now(), start);
if (check)
timers_check(&timers, NULL);
timers_cleanup(&timers);
opt_free_table();
for (i = 0; i < ARRAY_SIZE(timers.level); i++)
if (!timers.level[i])
break;
printf("%u in %lu.%09lu (%u levels / %zu)\n",
num, (long)curr.tv_sec, curr.tv_nsec,
i, ARRAY_SIZE(timers.level));
return 0;
}
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