Author: mav
Date: Fri Mar 27 09:04:31 2015
New Revision: 280752
URL: https://svnweb.freebsd.org/changeset/base/280752
Log:
MFC r280286: Add comment explaining existing powerd behavior on SMP systems.
Modified:
stable/9/usr.sbin/powerd/powerd.c
Directory Properties:
stable/9/ (props changed)
stable/9/usr.sbin/ (props changed)
stable/9/usr.sbin/powerd/ (props changed)
Modified: stable/9/usr.sbin/powerd/powerd.c
==============================================================================
--- stable/9/usr.sbin/powerd/powerd.c Fri Mar 27 09:01:25 2015
(r280751)
+++ stable/9/usr.sbin/powerd/powerd.c Fri Mar 27 09:04:31 2015
(r280752)
@@ -126,6 +126,12 @@ static int devd_pipe = -1;
#define DEVD_RETRY_INTERVAL 60 /* seconds */
static struct timeval tried_devd;
+/*
+ * This function returns summary load of all CPUs. It was made so
+ * intentionally to not reduce performance in scenarios when several
+ * threads are processing requests as a pipeline -- running one at
+ * a time on different CPUs and waiting for each other.
+ */
static int
read_usage_times(int *load)
{
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