From: joro@8bytes.org (Joerg Roedel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/8] io-pgtable lock removal
Date: Wed, 21 Jun 2017 17:47:26 +0200 [thread overview]
Message-ID: <20170621154726.GQ30388@8bytes.org> (raw)
In-Reply-To: <b7830be1-9a78-e29f-a29c-4798aaa28c0a@broadcom.com>
On Wed, Jun 14, 2017 at 05:40:30PM -0700, Ray Jui wrote:
> With the NVMf target test with 4 SSDs, fio based test, random read, 4k,
> 8 jobs:
>
> Without IOMMU:
>
> IOPS = 1080K
>
> With IOMMU, but without your latest patch:
>
> IOPS = 520K
>
> With IOMMU and your latest patch:
>
> IOPS = 500K ~ 850K (a lot of variation observed during the same test run)
That variation might come from the RB-Tree used in the IOVA allocator.
For block-device workloads the allocation size of iova ranges might be
bigger than what is cached in the magazines, so that the fall-back to
the old (locked) allocator is used.
Joerg
prev parent reply other threads:[~2017-06-21 15:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-08 11:51 [PATCH 0/8] io-pgtable lock removal Robin Murphy
2017-06-08 11:52 ` [PATCH 1/8] iommu/io-pgtable-arm-v7s: Check table PTEs more precisely Robin Murphy
2017-06-08 11:52 ` [PATCH 2/8] iommu/io-pgtable-arm: Improve split_blk_unmap Robin Murphy
2017-06-08 11:52 ` [PATCH 3/8] iommu/io-pgtable-arm-v7s: Refactor split_blk_unmap Robin Murphy
2017-06-08 11:52 ` [PATCH 4/8] iommu/io-pgtable: Introduce explicit coherency Robin Murphy
2017-06-08 11:52 ` [PATCH 5/8] iommu/io-pgtable-arm: Support lockless operation Robin Murphy
2017-06-08 11:52 ` [PATCH 6/8] iommu/io-pgtable-arm-v7s: " Robin Murphy
2017-06-08 11:52 ` [PATCH 7/8] iommu/arm-smmu: Remove io-pgtable spinlock Robin Murphy
2017-06-08 11:52 ` [PATCH 8/8] iommu/arm-smmu-v3: " Robin Murphy
2017-06-09 19:28 ` [PATCH 0/8] io-pgtable lock removal Nate Watterson
2017-06-15 0:40 ` Ray Jui
2017-06-15 12:25 ` John Garry
2017-06-20 13:37 ` Robin Murphy
2017-06-27 16:43 ` Ray Jui
2017-06-28 11:46 ` Will Deacon
2017-06-28 17:02 ` Ray Jui
2017-07-04 17:31 ` Will Deacon
2017-07-04 17:39 ` Ray Jui
2017-07-05 1:45 ` Ray Jui
2017-07-05 8:41 ` Will Deacon
2017-07-05 23:24 ` Ray Jui
2017-07-06 15:08 ` Will Deacon
2017-07-06 18:14 ` Ray Jui
2017-07-07 12:46 ` Will Deacon
2017-06-21 15:47 ` Joerg Roedel [this message]
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