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

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Message-ID: <bdcf9676-7846-1f14-1dd1-80cb9dcb0794@bytedance.com>
Date:   Wed, 21 Sep 2022 11:55:59 +0800
From:   Peng Zhang <zhangpeng.00@...edance.com>
To:     "wangjie (L)" <wangjie125@...wei.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

> 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.