From: Paolo Valente <paolo.valente@linaro.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
Paolo Valente <paolo.valente@linaro.org>, Jan Kara <jack@suse.cz>
Subject: [PATCH BUGFIX/IMPROVEMENT 3/6] block, bfq: increase time window for waker detection
Date: Fri, 22 Jan 2021 19:19:45 +0100 [thread overview]
Message-ID: <20210122181948.35660-4-paolo.valente@linaro.org> (raw)
In-Reply-To: <20210122181948.35660-1-paolo.valente@linaro.org>
Tests on slower machines showed current window to be way too
small. This commit increases it.
Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
---
block/bfq-iosched.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index fdc5e163b2fe..43e2c39cf7b5 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1931,7 +1931,7 @@ static void bfq_add_request(struct request *rq)
if (bfqd->last_completed_rq_bfqq &&
!bfq_bfqq_has_short_ttime(bfqq) &&
ktime_get_ns() - bfqd->last_completion <
- 200 * NSEC_PER_USEC) {
+ 4 * NSEC_PER_MSEC) {
if (bfqd->last_completed_rq_bfqq != bfqq &&
bfqd->last_completed_rq_bfqq !=
bfqq->waker_bfqq) {
--
2.20.1
next prev parent reply other threads:[~2021-01-22 19:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 18:19 [PATCH BUGFIX/IMPROVEMENT 0/6] block, bfq: first bath of fixes and improvements Paolo Valente
2021-01-22 18:19 ` [PATCH BUGFIX/IMPROVEMENT 1/6] block, bfq: use half slice_idle as a threshold to check short ttime Paolo Valente
2021-01-22 18:19 ` [PATCH BUGFIX/IMPROVEMENT 2/6] block, bfq: set next_rq to waker_bfqq->next_rq in waker injection Paolo Valente
2021-01-22 18:19 ` Paolo Valente [this message]
2021-01-22 18:19 ` [PATCH BUGFIX/IMPROVEMENT 4/6] block, bfq: do not raise non-default weights Paolo Valente
2021-01-22 18:19 ` [PATCH BUGFIX/IMPROVEMENT 5/6] block, bfq: avoid spurious switches to soft_rt of interactive queues Paolo Valente
2021-01-22 18:19 ` [PATCH BUGFIX/IMPROVEMENT 6/6] block, bfq: do not expire a queue when it is the only busy one Paolo Valente
2021-01-22 18:22 ` [PATCH BUGFIX/IMPROVEMENT 0/6] block, bfq: first bath of fixes and improvements Paolo Valente
2021-01-25 1:18 ` Jens Axboe
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