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From: Hans-Peter Lehmann <hans-peter.lehmann@kit.edu>
To: Erwan Velu <e.velu@criteo.com>,
	"fio@vger.kernel.org" <fio@vger.kernel.org>
Subject: Re: Question: t/io_uring performance
Date: Mon, 6 Sep 2021 16:26:21 +0200	[thread overview]
Message-ID: <77b67cc0-30c1-70a8-438b-f1bcf1fdb295@kit.edu> (raw)
In-Reply-To: <e41a49a8-f5ea-9f50-0327-dd2af9487153@criteo.com>

Hi Jens,

not sure if you have read the emails in this thread - now trying to address you directly. Both Erwan and me are unable to reproduce your single-threaded IOPS measurements - we don't even get close to your numbers. The bottle-neck seems to be the CPU, not the SSDs. Did you use some special configuration for your benchmarks?

Best regards
Hans-Peter

(I have also reproduced the behavior with an Intel processor now - the single-threaded throughput is also capped at around 580k IOPS, even though the SSDs can handle more than that when using multiple threads)

  reply	other threads:[~2021-09-06 14:26 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25 15:57 Question: t/io_uring performance Hans-Peter Lehmann
2021-08-26  7:27 ` Erwan Velu
2021-08-26 15:57   ` Hans-Peter Lehmann
2021-08-27  7:20     ` Erwan Velu
2021-09-01 10:36       ` Hans-Peter Lehmann
2021-09-01 13:17         ` Erwan Velu
2021-09-01 14:02           ` Hans-Peter Lehmann
2021-09-01 14:05             ` Erwan Velu
2021-09-01 14:17               ` Erwan Velu
2021-09-06 14:26                 ` Hans-Peter Lehmann [this message]
2021-09-06 14:41                   ` Erwan Velu
2021-09-08 11:53                   ` Sitsofe Wheeler
2021-09-08 12:22                     ` Jens Axboe
2021-09-08 12:41                       ` Jens Axboe
2021-09-08 16:12                         ` Hans-Peter Lehmann
2021-09-08 16:20                           ` Jens Axboe
2021-09-08 21:24                             ` Hans-Peter Lehmann
2021-09-08 21:34                               ` Jens Axboe
2021-09-10 11:25                                 ` Hans-Peter Lehmann
2021-09-10 11:45                                   ` Erwan Velu
2021-09-08 12:33                 ` Jens Axboe
2021-09-08 17:11                   ` Erwan Velu
2021-09-08 22:37                     ` Erwan Velu
2021-09-16 21:18                       ` Erwan Velu
2021-09-21  7:05                         ` Erwan Velu
2021-09-22 14:45                           ` Hans-Peter Lehmann

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