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| author | mav <mav@FreeBSD.org> | 2015-03-20 15:07:05 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2015-03-20 15:07:05 +0000 |
| commit | 7904a438e50d7cc9ee78c6f2cb8a6d4cb1c971fc (patch) | |
| tree | 9dd60ff3a925989f421a82c269332144ddc18de2 /usr.sbin | |
| parent | e04a003ec37c132e402afe6def1740116c42c0e2 (diff) | |
| download | FreeBSD-src-7904a438e50d7cc9ee78c6f2cb8a6d4cb1c971fc.zip FreeBSD-src-7904a438e50d7cc9ee78c6f2cb8a6d4cb1c971fc.tar.gz | |
Add comment explaining existing powerd behavior on SMP systems.
MFC after: 1 week
Diffstat (limited to 'usr.sbin')
| -rw-r--r-- | usr.sbin/powerd/powerd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/usr.sbin/powerd/powerd.c b/usr.sbin/powerd/powerd.c index 3f628f6..367a31f 100644 --- a/usr.sbin/powerd/powerd.c +++ b/usr.sbin/powerd/powerd.c @@ -127,6 +127,12 @@ 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) { |
