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 07E85C433F5 for ; Thu, 3 Mar 2022 01:40:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231402AbiCCBlQ (ORCPT ); Wed, 2 Mar 2022 20:41:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231366AbiCCBlP (ORCPT ); Wed, 2 Mar 2022 20:41:15 -0500 Received: from out2.migadu.com (out2.migadu.com [IPv6:2001:41d0:2:aacc::]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 170961B5120 for ; Wed, 2 Mar 2022 17:40:30 -0800 (PST) Subject: Re: Raid5 Batching Question DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1646271627; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=s+353RJDliQSNJ1I68AzwRrOWID0IdI3YGve6KLbKwA=; b=U2IdOrtnUMgBj4v9/HpCabxZ8NYkEr9aP8GCJomz5w1ys0Z5pISThL+YlIFHPll1epAk6j 4H8x2n3u8zw6fmL/e1w+GYSM2/B5YswD9SUH8iEkWuqxBMq4IbxkKtgn/Xe/ze3/2k0kbc yksIGEdMwp/sJJWkCzIiTkUetgI+QJk= To: Logan Gunthorpe , 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> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Guoqing Jiang Message-ID: <806cdd27-8633-09dd-6942-12437c8b9818@linux.dev> Date: Thu, 3 Mar 2022 09:40:20 +0800 MIME-Version: 1.0 In-Reply-To: <34a8b64a-37d3-9966-1fe8-d57c432600d7@deltatee.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org 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 Thanks, Guoqing