From 1f9ea0cb5c88fa600fa0eb332fa3b79bcd921a59 Mon Sep 17 00:00:00 2001 From: aliguori Date: Fri, 31 Oct 2008 18:40:25 +0000 Subject: [PATCH] Increase default IO timeout from 10ms to 5s With the recent changes to the main loop, we no longer have unconditional polling. This means we can now sleep in select() for much longer than we previously did. This patch increases our select() sleep time from 10ms to 5s which is effectively unlimited since we're going to wake up sooner than that in almost all circumstances. With this patch, I see the number of wake-ups with an idle dynamic ticks guest drop from 80 per second to about 15 times per second. Signed-off-by: Anthony Liguori git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5578 c046a42c-6fe2-441c-8c8c-71466251a162 --- vl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/vl.c b/vl.c index 87ffb07..a443034 100644 --- a/vl.c +++ b/vl.c @@ -8182,7 +8182,7 @@ static int main_loop(void) timeout = 0; } } else { - timeout = 10; + timeout = 5000; } } else { timeout = 0; @@ -8192,7 +8192,7 @@ static int main_loop(void) ret = EXCP_INTERRUPT; break; } - timeout = 10; + timeout = 5000; } #ifdef CONFIG_PROFILER ti = profile_getclock(); -- 2.7.4