linux-kernel - Re: [PATCH v4 2/2] btrfs: use iget5_locked

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Message-ID: <20240612183329.GI18508@twin.jikos.cz>
Date: Wed, 12 Jun 2024 20:33:29 +0200
From: David Sterba <dsterba@...e.cz>
To: Mateusz Guzik <mjguzik@...il.com>
Cc: brauner@...nel.org, viro@...iv.linux.org.uk, jack@...e.cz,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-btrfs@...r.kernel.org, josef@...icpanda.com,
	hch@...radead.org
Subject: Re: [PATCH v4 2/2] btrfs: use iget5_locked_rcu

On Tue, Jun 11, 2024 at 07:38:23PM +0200, Mateusz Guzik wrote:
> With 20 threads each walking a dedicated 1000 dirs * 1000 files
> directory tree to stat(2) on a 32 core + 24GB ram vm:
> 
> before: 3.54s user 892.30s system 1966% cpu 45.549 total
> after:  3.28s user 738.66s system 1955% cpu 37.932 total (-16.7%)
> 
> Benchmark can be found here: https://people.freebsd.org/~mjg/fstree.tgz
> 
> Reviewed-by: Josef Bacik <josef@...icpanda.com>
> Signed-off-by: Mateusz Guzik <mjguzik@...il.com>

Acked-by: David Sterba <dsterba@...e.com>