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In debug mode: time how long select() takes.

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Emil Mikulic 2018-12-10 01:09:33 +11:00
parent 89af6956e2
commit 744bac5cb8
1 changed files with 17 additions and 4 deletions
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21
darkhttpd.c
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@ -44,6 +44,7 @@ static const int debug = 1;
# include <sys/sendfile.h> # include <sys/sendfile.h>
#endif #endif
#include <sys/time.h>
#include <sys/types.h> #include <sys/types.h>
#include <sys/socket.h> #include <sys/socket.h>
#include <sys/stat.h> #include <sys/stat.h>
@ -2328,7 +2329,7 @@ static void httpd_poll(void) {
int max_fd, select_ret; int max_fd, select_ret;
struct connection *conn, *next; struct connection *conn, *next;
int bother_with_timeout = 0; int bother_with_timeout = 0;
struct timeval timeout; struct timeval timeout, t0, t1;
timeout.tv_sec = idletime; timeout.tv_sec = idletime;
timeout.tv_usec = 0; timeout.tv_usec = 0;
@ -2363,9 +2364,11 @@ static void httpd_poll(void) {
#undef MAX_FD_SET #undef MAX_FD_SET
/* -select- */ /* -select- */
if (debug) if (debug) {
printf("select() with max_fd %d timeout %d\n", printf("select() with max_fd %d timeout %d\n",
max_fd, bother_with_timeout ? (int)timeout.tv_sec : 0); max_fd, bother_with_timeout ? (int)timeout.tv_sec : 0);
gettimeofday(&t0, NULL);
}
select_ret = select(max_fd + 1, &recv_set, &send_set, NULL, select_ret = select(max_fd + 1, &recv_set, &send_set, NULL,
(bother_with_timeout) ? &timeout : NULL); (bother_with_timeout) ? &timeout : NULL);
if (select_ret == 0) { if (select_ret == 0) {
@ -2378,8 +2381,18 @@ static void httpd_poll(void) {
else else
err(1, "select() failed"); err(1, "select() failed");
} }
if (debug) if (debug) {
printf("select() returned %d\n", select_ret); long long sec, usec;
gettimeofday(&t1, NULL);
sec = t1.tv_sec - t0.tv_sec;
usec = t1.tv_usec - t0.tv_usec;
if (usec < 0) {
usec += 1000000;
sec--;
}
printf("select() returned %d after %lld.%06lld secs\n",
select_ret, sec, usec);
}
/* update time */ /* update time */
now = time(NULL); now = time(NULL);