From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A93FC433F5 for ; Thu, 3 Mar 2022 16:20:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233778AbiCCQUz (ORCPT ); Thu, 3 Mar 2022 11:20:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230522AbiCCQUz (ORCPT ); Thu, 3 Mar 2022 11:20:55 -0500 Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2425199D7C for ; Thu, 3 Mar 2022 08:20:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:content-disposition; bh=Soof3/++XSnUnQ3KKT9v4nghmSEVc3WNPP78zK1WNnI=; b=OnEE4NVgZ/mv1lhldvvJ5HOxKl iWLzGj8Baz9kJwGTq0eagCcuYivKB+kvxvK6hr6MnqXhLdki2S7QTz45SryaiBQcWLrix3HcHCCiD bDi7ijKZA/yOSdSoZa2l6/werMjYjUns66jMumtLhBw8hvnugANWWEaEtIn1GPV7XsNY0D/l5MigB MpfCnxBXdmN3CfFBL9bEzsyVNGFpp1q4cB3V1wG/gEynkR2aP8I4ri2nRdxWGIappA9EwHg8RuqKO TfECuF2mcM8JT71RnJaqwIqPprnQiuCsJ/cRiNeMRR1mOxcTP8nmXgqgRyJ7No5kt7u98k/+VoRR8 Gjt5lU1Q==; Received: from s0106a84e3fe8c3f3.cg.shawcable.net ([24.64.144.200] helo=[192.168.0.10]) by ale.deltatee.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1nPoBR-00Djeb-3H; Thu, 03 Mar 2022 09:20:05 -0700 To: Guoqing Jiang , linux-raid@vger.kernel.org Cc: Shaohua Li , Shaohua Li , Song Liu References: <11cfe3aa-b778-b3e5-a152-50abc6c054ac@deltatee.com> <34a8b64a-37d3-9966-1fe8-d57c432600d7@deltatee.com> <806cdd27-8633-09dd-6942-12437c8b9818@linux.dev> From: Logan Gunthorpe Message-ID: Date: Thu, 3 Mar 2022 09:20:03 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <806cdd27-8633-09dd-6942-12437c8b9818@linux.dev> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 24.64.144.200 X-SA-Exim-Rcpt-To: song@kernel.org, shli@fb.com, shli@kernel.org, linux-raid@vger.kernel.org, guoqing.jiang@linux.dev X-SA-Exim-Mail-From: logang@deltatee.com Subject: Re: Raid5 Batching Question X-SA-Exim-Version: 4.2.1 (built Sat, 13 Feb 2021 17:57:42 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On 2022-03-02 6:40 p.m., Guoqing Jiang wrote: > > > On 3/3/22 7:24 AM, Logan Gunthorpe wrote: >> So I'm back to square one trying to find some performance improvements >> on the write path. > > Did you try with group_thread_cnt? > > /sys/block/md0/md/group_thread_cnt Yes, I've tried group_thread_cnt and raised stripe_cache_size and a few other parameters. Still get limited write performance. Thanks, Logan