diff options
| author | Stefan Hajnoczi <stefanha@redhat.com> | 2013-04-05 11:32:22 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2013-04-05 18:58:05 +0200 |
| commit | 0775437fafc5c733564645a22f75490770bf41f7 (patch) | |
| tree | 8ebcc8304fc7a3f26230683fc47186b76e227a4d | |
| parent | e660fb8b3ccc94652774d5895d122c0f13aecb89 (diff) | |
block: clean up I/O throttling wait_time code
The wait_time variable is in seconds. Reflect this in a comment and use
NANOSECONDS_PER_SECOND instead of BLOCK_IO_SLICE_TIME * 10 (which
happens to have the right value).
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-By: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block.c | 6 |
1 files changed, 3 insertions, 3 deletions
@@ -3800,7 +3800,7 @@ static bool bdrv_exceed_bps_limits(BlockDriverState *bs, int nb_sectors, BLOCK_IO_SLICE_TIME; bs->slice_end += extension; if (wait) { - *wait = wait_time * BLOCK_IO_SLICE_TIME * 10; + *wait = wait_time * NANOSECONDS_PER_SECOND; } return true; @@ -3841,7 +3841,7 @@ static bool bdrv_exceed_iops_limits(BlockDriverState *bs, bool is_write, return false; } - /* Calc approx time to dispatch */ + /* Calc approx time to dispatch, in seconds */ wait_time = (ios_base + 1) / iops_limit; if (wait_time > elapsed_time) { wait_time = wait_time - elapsed_time; @@ -3852,7 +3852,7 @@ static bool bdrv_exceed_iops_limits(BlockDriverState *bs, bool is_write, /* Exceeded current slice, extend it by another slice time */ bs->slice_end += BLOCK_IO_SLICE_TIME; if (wait) { - *wait = wait_time * BLOCK_IO_SLICE_TIME * 10; + *wait = wait_time * NANOSECONDS_PER_SECOND; } return true; |