linux-kernel - Re: [PATCH v2] iommu/iova: Optimize alloc_iova with rbtree

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Date:   Wed, 21 Sep 2022 18:54:01 +0800
From:   "wangjie (L)" <wangjie125@...wei.com>
To:     Peng Zhang <zhangpeng.00@...edance.com>, <joro@...tes.org>,
        <will@...nel.org>
CC:     <iommu@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
        <robin.murphy@....com>, <haifeng.zhao@...ux.intel.com>,
        <john.garry@...wei.com>
Subject: Re: [PATCH v2] iommu/iova: Optimize alloc_iova with rbtree_augmented

Tested-by: Jie Wang <wangjie125@...wei.com>

On 2022/9/21 11:55, Peng Zhang wrote:
>> This patch seems to solve the performance issues i have.  Currently my
>> nic's rx performance is unstable in large-capacity scenarios. I
>> applied this patch to 5.19 rc4 and tested 8 times rx performance in
>> these scenes. Here are test results, "before" row is the result of
>> 5.19 rc4. "after" row means 5.19 rc4 with this patch, the unit is Mbits/s
>>
>>      1    2    3    4    5    6    7    8
>> before    55430    76701    84194    77560    88292    90106
>> 87770    77273
>> after    92770    92767    92792    92764    92742    92696
>> 92781    92756
>>
>> Obviously, after using this patch, the performance is stable.
>
> Thank you for your test. Can you add a "Tested-by" token?
> I plan to update the commit message in the next version.
> .
>