From: Roland McGrath <roland@redhat.com>
Date: Sat, 1 Nov 2003 22:11:22 +0000 (+0000)
Subject: 2003-11-01  Roland McGrath  <roland@redhat.com>
X-Git-Tag: v4.5.18~683
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ee9c5b5d6321bc7e9c7d0553716d9d4fe09f1061;p=strace

2003-11-01  Roland McGrath  <roland@redhat.com>

	* syscall.c (trace_syscall) [LINUX]: Calculate ONE_TICK once using
	setitimer rather than hard-coding a value based on HZ.
---

diff --git a/syscall.c b/syscall.c
index 1fb30d9c..d4f6413a 100644
--- a/syscall.c
+++ b/syscall.c
@@ -2135,8 +2135,16 @@ struct tcb *tcp;
 			tv_sub(&tv, &tv, &tcp->etime);
 #ifdef LINUX
 			if (tv_cmp(&tv, &tcp->dtime) > 0) {
-				static struct timeval one_tick =
-					{ 0, 1000000 / HZ };
+				static struct timeval one_tick;
+				if (one_tick.tv_usec == 0) {
+					/* Initialize it.  */
+					struct itimerval it;
+					memset(&it, 0, sizeof it);
+					it.it_interval.tv_usec = 1;
+					setitimer(ITIMER_REAL, &it, NULL);
+					getitimer(ITIMER_REAL, &it);
+					one_tick = it.it_interval;
+				}
 
 				if (tv_nz(&tcp->dtime))
 					tv = tcp->dtime;