From: Christoph Hellwig <hch@lst.de>
To: Wang Yugui <wangyugui@e16-tech.com>
Cc: Christoph Hellwig <hch@lst.de>, linux-btrfs@vger.kernel.org
Subject: Re: btrfs write-bandwidth performance regression of 6.5-rc4/rc3
Date: Tue, 1 Aug 2023 10:35:56 +0200 [thread overview]
Message-ID: <20230801083556.GA24287@lst.de> (raw)
In-Reply-To: <20230801102253.1AF4.409509F4@e16-tech.com>
On Tue, Aug 01, 2023 at 10:22:58AM +0800, Wang Yugui wrote:
> 'git bisect' show that this patch is the root cause of performance
> regression.
>
> e917ff56c8e7 :Christoph Hellwig: btrfs: determine synchronous writers from bio
> or writeback control
Odd. What CPU are you using to test? It seems like it doesn't set
BTRFS_FS_CSUM_IMPL_FAST as that is the only way to even hit a potential
difference. Or are you using a non-standard checksum type?
next prev parent reply other threads:[~2023-08-01 8:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-31 7:22 btrfs write-bandwidth performance regression of 6.5-rc4/rc3 Wang Yugui
2023-08-01 2:22 ` Wang Yugui
2023-08-01 8:35 ` Christoph Hellwig [this message]
2023-08-01 8:56 ` Wang Yugui
2023-08-01 9:03 ` Christoph Hellwig
2023-08-01 9:32 ` Wang Yugui
2023-08-01 10:00 ` Christoph Hellwig
2023-08-01 13:04 ` Wang Yugui
2023-08-01 14:59 ` Christoph Hellwig
2023-08-01 15:51 ` Wang Yugui
2023-08-01 15:56 ` Christoph Hellwig
2023-08-01 15:57 ` Christoph Hellwig
2023-08-02 0:04 ` Wang Yugui
2023-08-02 9:26 ` Christoph Hellwig
2023-08-11 8:58 ` Linux regression tracking (Thorsten Leemhuis)
2023-08-11 10:31 ` Christoph Hellwig
2023-08-11 14:23 ` Wang Yugui
2023-08-11 14:52 ` Chris Mason
2023-08-13 9:50 ` Wang Yugui
2023-08-29 9:45 ` Linux regression tracking (Thorsten Leemhuis)
2023-09-11 7:02 ` Thorsten Leemhuis
2023-09-11 23:20 ` Wang Yugui
2023-09-12 7:58 ` Linux regression tracking (Thorsten Leemhuis)
2023-09-26 10:55 ` Thorsten Leemhuis
2023-09-26 17:18 ` Chris Mason
2023-09-27 11:30 ` Linux regression tracking (Thorsten Leemhuis)
2023-12-06 14:22 ` Linux regression tracking (Thorsten Leemhuis)
2023-12-13 15:57 ` Naohiro Aota
2023-08-02 8:45 ` Linux regression tracking #adding (Thorsten Leemhuis)
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