On Tue, 14 Jun 2022 15:58:29 +0000, Vincent Fu wrote:
> Jens, here are a few latency cleanup patches. The main improvement is to
> avoid recording issue_time twice for the ioengines that record
> issue_time themselves when their commit hook is called. Recording
> issue_time twice underestimates clat since the first issue_time value is
> used for slat and then the later second issue_time is used when
> calculating clat.
>
> [...]
Applied, thanks!
[1/5] ioengines: add helper for trims with async ioengines
commit: d46b4565dfdaddbfdd91976a57b2564aa7a52f62
[2/5] ioengines: don't record issue_time if ioengines already do it
commit: 4e7e78980ff32627e12b48d72496b701dd200a42
[3/5] HOWTO: improve description of latency measures
commit: 13ddd98b2a70c55657f952096785ccc64479f0eb
[4/5] ioengines: update last_issue if we set issue_time
commit: 39f56400f63e43fbe33e391d52f24eb6c79d0098
[5/5] ioengines: clean up latency accounting for 3 ioengines
commit: 2b82135e42fc5872338ee16e16d317b16abfe308
Best regards,
--
Jens Axboe
