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From: Ming Lei <ming.lei@redhat.com>
To: linux-nvme@lists.infradead.org
Cc: Sagi Grimberg <sagi@grimberg.me>, Long Li <longli@microsoft.com>,
	Ming Lei <ming.lei@redhat.com>, Jens Axboe <axboe@fb.com>,
	Keith Busch <kbusch@kernel.org>, Christoph Hellwig <hch@lst.de>
Subject: [PATCH 0/2] nvme-pci: improve IO performance via poll after batch submission
Date: Fri,  8 Nov 2019 11:55:06 +0800
Message-ID: <20191108035508.26395-1-ming.lei@redhat.com> (raw)

Hi,

In case that single nvme queue is mapped from multiple blk-mq sw queue,
this patchset improves IO handling by polling after batch submission.

Turns out that IOPS is improved much in single job aio test.

Also it is observed that the CPU lockup issue in Hyper V guest can't
be triggered any more after this patch is applied.

Thanks,

Ming Lei (2):
  nvme-pci: move sq/cq_poll lock initialization into nvme_init_queue
  nvme-pci: poll IO after batch submission for multi-mapping queue

 drivers/nvme/host/pci.c | 93 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 82 insertions(+), 11 deletions(-)

Cc: Keith Busch <kbusch@kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Long Li <longli@microsoft.com>

-- 
2.20.1


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Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-08  3:55 Ming Lei [this message]
2019-11-08  3:55 ` [PATCH 1/2] nvme-pci: move sq/cq_poll lock initialization into nvme_init_queue Ming Lei
2019-11-08  4:12   ` Keith Busch
2019-11-08  7:09     ` Ming Lei
2019-11-08  3:55 ` [PATCH 2/2] nvme-pci: poll IO after batch submission for multi-mapping queue Ming Lei
2019-11-11 20:44   ` Christoph Hellwig
2019-11-12  0:33     ` Long Li
2019-11-12  1:35       ` Sagi Grimberg
2019-11-12  2:39       ` Ming Lei
2019-11-12 16:25         ` Hannes Reinecke
2019-11-12 16:49           ` Keith Busch
2019-11-12 17:29             ` Hannes Reinecke
2019-11-13  3:05               ` Ming Lei
2019-11-13  3:17                 ` Keith Busch
2019-11-13  3:57                   ` Ming Lei
2019-11-12 21:20         ` Long Li
2019-11-12 21:36           ` Keith Busch
2019-11-13  0:50             ` Long Li
2019-11-13  2:24           ` Ming Lei
2019-11-12  2:07     ` Ming Lei
2019-11-12  1:44   ` Sagi Grimberg
2019-11-12  9:56     ` Ming Lei
2019-11-12 17:35       ` Sagi Grimberg
2019-11-12 21:17         ` Long Li
2019-11-12 23:44         ` Jens Axboe
2019-11-13  2:47         ` Ming Lei
2019-11-12 18:11   ` Nadolski, Edmund
2019-11-13 13:46     ` Ming Lei

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