From: "Pavel Begunkov (Silence)" <asml.silence@gmail.com>
To: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Pavel Begunkov <asml.silence@gmail.com>
Subject: [PATCH 0/7] Adjust hybrid polling sleep time
Date: Tue, 30 Apr 2019 10:34:12 +0300 [thread overview]
Message-ID: <cover.1556609582.git.asml.silence@gmail.com> (raw)
From: Pavel Begunkov <asml.silence@gmail.com>
Sleep time for adaptive hybrid polling is coarse and can be improved to
decrease CPU load. Use variation of the 3-sigma rule and runtime
tuning.
This approach gives up to 2x CPU load reduction keeping the same latency
distribution and throughput.
Pavel Begunkov (7):
blk-iolatency: Fix zero mean in previous stats
blk-stats: Introduce explicit stat staging buffers
blk-mq: Fix disabled hybrid polling
blk-stats: Add left mean deviation to blk_stats
blk-mq: Precalculate hybrid polling time
blk-mq: Track num of overslept by hybrid poll rqs
blk-mq: Adjust hybrid poll sleep time
block/blk-core.c | 7 +-
block/blk-iolatency.c | 60 ++++++++++----
block/blk-mq-debugfs.c | 14 ++--
block/blk-mq.c | 163 ++++++++++++++++++++++++++++----------
block/blk-stat.c | 67 +++++++++++++---
block/blk-stat.h | 15 +++-
include/linux/blk_types.h | 9 +++
include/linux/blkdev.h | 17 +++-
8 files changed, 271 insertions(+), 81 deletions(-)
--
2.21.0
next reply other threads:[~2019-04-30 7:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 7:34 Pavel Begunkov (Silence) [this message]
2019-04-30 7:34 ` [PATCH 1/7] blk-iolatency: Fix zero mean in previous stats Pavel Begunkov (Silence)
2019-04-30 7:34 ` [PATCH 2/7] blk-stats: Introduce explicit stat staging buffers Pavel Begunkov (Silence)
2019-04-30 7:34 ` [PATCH 3/7] blk-mq: Fix disabled hybrid polling Pavel Begunkov (Silence)
2019-04-30 7:34 ` [PATCH 4/7] blk-stats: Add left mean deviation to blk_stats Pavel Begunkov (Silence)
2019-04-30 7:34 ` [PATCH 5/7] blk-mq: Precalculate hybrid polling time Pavel Begunkov (Silence)
2019-04-30 7:34 ` [PATCH 6/7] blk-mq: Track num of overslept by hybrid poll rqs Pavel Begunkov (Silence)
2019-04-30 7:34 ` [PATCH 7/7] blk-mq: Adjust hybrid poll sleep time Pavel Begunkov (Silence)
2019-05-24 9:06 ` [PATCH 0/7] Adjust hybrid polling " Pavel Begunkov
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