From: Cong Wang <xiyou.wangcong@gmail.com>
To: iommu@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org, joro@8bytes.org,
Cong Wang <xiyou.wangcong@gmail.com>
Subject: [Patch v2 0/3] iommu: reduce spinlock contention on fast path
Date: Thu, 28 Nov 2019 16:48:52 -0800 [thread overview]
Message-ID: <20191129004855.18506-1-xiyou.wangcong@gmail.com> (raw)
This patchset contains three small optimizations for the global spinlock
contention in IOVA cache. Our memcache perf test shows this reduced its
p999 latency down by 45% on AMD when IOMMU is enabled.
Cong Wang (3):
iommu: match the original algorithm
iommu: optimize iova_magazine_free_pfns()
iommu: avoid taking iova_rbtree_lock twice
---
drivers/iommu/iova.c | 75 ++++++++++++++++++++++++++------------------
1 file changed, 45 insertions(+), 30 deletions(-)
--
2.21.0
WARNING: multiple messages have this Message-ID (diff)
From: Cong Wang <xiyou.wangcong@gmail.com>
To: iommu@lists.linux-foundation.org
Cc: Cong Wang <xiyou.wangcong@gmail.com>, linux-kernel@vger.kernel.org
Subject: [Patch v2 0/3] iommu: reduce spinlock contention on fast path
Date: Thu, 28 Nov 2019 16:48:52 -0800 [thread overview]
Message-ID: <20191129004855.18506-1-xiyou.wangcong@gmail.com> (raw)
This patchset contains three small optimizations for the global spinlock
contention in IOVA cache. Our memcache perf test shows this reduced its
p999 latency down by 45% on AMD when IOMMU is enabled.
Cong Wang (3):
iommu: match the original algorithm
iommu: optimize iova_magazine_free_pfns()
iommu: avoid taking iova_rbtree_lock twice
---
drivers/iommu/iova.c | 75 ++++++++++++++++++++++++++------------------
1 file changed, 45 insertions(+), 30 deletions(-)
--
2.21.0
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next reply other threads:[~2019-11-29 0:49 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-29 0:48 Cong Wang [this message]
2019-11-29 0:48 ` [Patch v2 0/3] iommu: reduce spinlock contention on fast path Cong Wang
2019-11-29 0:48 ` [Patch v2 1/3] iommu: match the original algorithm Cong Wang
2019-11-29 0:48 ` Cong Wang
2019-11-29 14:43 ` John Garry
2019-11-29 14:43 ` John Garry
2019-11-30 5:58 ` Cong Wang
2019-11-30 5:58 ` Cong Wang
2019-12-02 10:55 ` John Garry
2019-12-02 10:55 ` John Garry
2019-12-03 19:26 ` Cong Wang
2019-12-03 19:26 ` Cong Wang
2019-12-02 16:58 ` Christoph Hellwig
2019-12-02 16:58 ` Christoph Hellwig
2019-12-03 19:24 ` Cong Wang
2019-12-03 19:24 ` Cong Wang
2019-11-29 0:48 ` [Patch v2 2/3] iommu: optimize iova_magazine_free_pfns() Cong Wang
2019-11-29 0:48 ` Cong Wang
2019-11-29 13:24 ` John Garry
2019-11-29 13:24 ` John Garry
2019-11-30 6:02 ` Cong Wang
2019-11-30 6:02 ` Cong Wang
2019-12-02 10:02 ` John Garry
2019-12-02 10:02 ` John Garry
2019-12-03 19:40 ` Cong Wang
2019-12-03 19:40 ` Cong Wang
2019-12-02 16:59 ` Christoph Hellwig
2019-12-02 16:59 ` Christoph Hellwig
2019-12-03 19:28 ` Cong Wang
2019-12-03 19:28 ` Cong Wang
2019-11-29 0:48 ` [Patch v2 3/3] iommu: avoid taking iova_rbtree_lock twice Cong Wang
2019-11-29 0:48 ` Cong Wang
2019-11-29 13:34 ` John Garry
2019-11-29 13:34 ` John Garry
2019-11-30 6:03 ` Cong Wang
2019-11-30 6:03 ` Cong Wang
2019-12-17 9:43 ` [Patch v2 0/3] iommu: reduce spinlock contention on fast path Joerg Roedel
2019-12-17 9:43 ` Joerg Roedel
2019-12-18 4:32 ` Cong Wang
2019-12-18 4:32 ` Cong Wang
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