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Wed, 24 Sep 2025 17:09:21 -0400 (EDT) Message-ID: Date: Wed, 24 Sep 2025 23:09:20 +0200 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Fuse over io_uring mode cannot handle iodepth > 1 case properly like the default mode From: Bernd Schubert To: Gang He Cc: "linux-fsdevel@vger.kernel.org" References: <5f63c8e3-c246-442a-a3a6-d455c0ee9302@bsbernd.com> Content-Language: en-US, de-DE, fr In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/18/25 10:38, Bernd Schubert wrote: > [Added back fsdevel into CC] > I'm getting there, upcoming patch as part of the queue reduction series: fuse: {io-uring} Queue background requests on a different core Running background IO on a different core makes quite a difference. fio --directory=/tmp/dest --name=iops.\$jobnum --rw=randread \ --bs=4k --size=1G --numjobs=1 --iodepth=4 --time_based\ --runtime=30s --group_reporting --ioengine=io_uring\ --direct=1 unpatched READ: bw=272MiB/s (285MB/s), 272MiB/s-272MiB/s (285MB/s-285MB/s) ... patched Run status group 0 (all jobs): READ: bw=674MiB/s (707MB/s), 674MiB/s-674MiB/s (707MB/s-707MB/s) ... fuse-over-io-uring RFC v1 and v2 versions had https://lore.kernel.org/all/20240529-fuse-uring-for-6-9-rfc2-out-v1-17-d149476b1d65@ddn.com/ I dropped it on request as was an optimization hack. I had planned to add it back earlier, but was totally occupied from January to beginning of September... Thanks, Bernd