On Sat, Jul 31, 2021 at 10:17:09AM +0800, chenxiang wrote:
> From: Xiang Chen <chenxian...@hisilicon.com>
>
> The series ("Optimizing iommu_[map/unmap] performance") improve the
> iommu_[map/unmap] performance. Based on the series, implement
> [map/unmap]_pages
> callbacks for ARM SMMUV3.
> Use tool dma_map_benchmark to test the latency of map/unmap, and it promotes
> much on it. The test result is as follows:
> t = 1(thread = 1):
> before opt(us) after opt(us)
> g=1(4K size) 0.1/1.3 0.1/0.8
> g=2(8K size) 0.2/1.5 0.2/0.9
> g=4(16K size) 0.3/1.9 0.1/1.1
> g=8(32K size) 0.5/2.7 0.2/1.4
> g=16(64K size) 1.0/4.5 0.2/2.0
> g=32(128K size) 1.8/7.9 0.2/3.3
> g=64(256K size) 3.7/14.8 0.4/6.1
> g=128(512K size) 7.1/14.7 0.5/10.4
> g=256(1M size) 14.0/53.9 0.8/19.3
> g=512(2M size) 0.2/0.9 0.2/0.9
> g=1024(4M size) 0.5/1.5 0.4/1.0
>
> t = 10(thread = 10):
> before opt(us) after opt(us)
> g=1(4K size) 0.3/7.0 0.1/5.8
> g=2(8K size) 0.4/6.7 0.3/6.0
> g=4(16K size) 0.5/6.3 0.3/5.6
> g=8(32K size) 0.5/8.3 0.2/6.3
> g=16(64K size) 1.0/17.3 0.3/12.4
> g=32(128K size) 1.8/36.0 0.2/24.2
> g=64(256K size) 4.3/67.2 1.2/46.4
> g=128(512K size) 7.8/93.7 1.3/94.2
> g=256(1M size) 14.7/280.8 1.8/191.5
> g=512(2M size) 3.6/3.2 1.5/2.5
> g=1024(4M size) 2.0/3.1 1.8/2.6
>
> Xiang Chen (2):
> iommu/arm-smmu-v3: Implement the unmap_pages() IOMMU driver callback
> iommu/arm-smmu-v3: Implement the map_pages() IOMMU driver callback
For both patches:
Acked-by: Will Deacon <w...@kernel.org>
Joerg -- please can you take these directly? They build on top of the
changes from Isaac which you have queued on your 'core' branch.
Cheers,
Will
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