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| author | Alexander Motin <mav@FreeBSD.org> | 2015-03-20 15:07:05 +0000 |
|---|---|---|
| committer | Alexander Motin <mav@FreeBSD.org> | 2015-03-20 15:07:05 +0000 |
| commit | 0e2a18e657664b461e8394fff487c1d5c355f403 (patch) | |
| tree | 9dd60ff3a925989f421a82c269332144ddc18de2 /usr.sbin/powerd | |
| parent | e5e85011aeb681ad7134250fd9418e0f6482c7d4 (diff) | |
| download | src-0e2a18e657664b461e8394fff487c1d5c355f403.tar.gz src-0e2a18e657664b461e8394fff487c1d5c355f403.zip | |
Add comment explaining existing powerd behavior on SMP systems.
MFC after: 1 week
Notes
Notes:
svn path=/head/; revision=280286
Diffstat (limited to 'usr.sbin/powerd')
| -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 3f628f6a30c9..367a31f41c58 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) { |