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 X-Spam-Level: X-Spam-Status: No, score=-12.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B7423C56201 for ; Thu, 19 Nov 2020 07:09:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B979246E8 for ; Thu, 19 Nov 2020 07:09:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="iEtrGj8+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726118AbgKSHJG (ORCPT ); Thu, 19 Nov 2020 02:09:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726100AbgKSHJE (ORCPT ); Thu, 19 Nov 2020 02:09:04 -0500 Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99E46C0613D4 for ; Wed, 18 Nov 2020 23:09:04 -0800 (PST) Received: by mail-qt1-x842.google.com with SMTP id g17so3683597qts.5 for ; Wed, 18 Nov 2020 23:09:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:references:in-reply-to:mime-version:thread-index:date :message-id:subject:to:cc; bh=3aWraaoNmCOVm9+XTZbbJx2XBSO21zoW6xbtfKySAJE=; b=iEtrGj8+1v+oIh6/xMfh2qCdzDwIWG7vEGHzpRjIyce9+2DZZ57CEArrRYetCE1EdK 7uKEeDzK9AsgJmNM92JAB9cdnJrgoU3kSoWMdetLUFFJ3Xy2vYvpLV4SvEiv7ey0FWsQ kMYg3MW625gv54ehz0UeATWqPN+0dhWSZVhW4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:references:in-reply-to:mime-version :thread-index:date:message-id:subject:to:cc; bh=3aWraaoNmCOVm9+XTZbbJx2XBSO21zoW6xbtfKySAJE=; b=tF0tO8kHQm4KEMWgFGDKNTNRzcHw3PoHDs5E/NtCFa/2XPdY8ClfP93ns3vgRqZkCm 6so7kuN7Q9SQs1Ts67QnEQDf1yrVC0UFYFEgv+/MwcDCDL088NtxeMon0CJKDtrobplI khohrrMztYluh7VYoZQ0BmenAxLZxYGs6qAfzGmsWPYy7ZKK7LaeTWMKL3e77Sd8QUYq 1crSOeDQ5JFuxIDspUp5kBJQ6uNXftlTNEd4czhAKj5WvqM6AH7OTvN1Iedsu32dUxXc 4EeMOtfEN/DWzITD9Hew6gotlGqlIbUoSjZTgR2q+XkcPBAzu1OBs0IEnTnMrb6t36VU 6lxg== X-Gm-Message-State: AOAM532kqQJHzSj6ThqxJMB7N047obI+jDO1TJDbebjVSzbFWfu2EqmI 3HsAKSCM8K85YkkC76TpD04AhVm4ScqymIwIjxJbKQ== X-Google-Smtp-Source: ABdhPJwYQ6tyqsZpg5m9++LrXF0oeZtoNi8kXVF0RzASLC2zqGVDLYZ19AtLZVQ+rxloMDXAGAL+kpq6ikaKTEs3gRA= X-Received: by 2002:ac8:5c15:: with SMTP id i21mr9400364qti.190.1605769743520; Wed, 18 Nov 2020 23:09:03 -0800 (PST) From: Kashyap Desai References: <20201116090737.50989-13-ming.lei@redhat.com> <202011161944.U7XHrbsd-lkp@intel.com> <20201118023507.GA92339@T590> <36b8e652641fefca6e8f95d3bbaaf3ca@mail.gmail.com> <20201119063407.GB170672@T590> In-Reply-To: <20201119063407.GB170672@T590> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 15.0 Thread-Index: AQIS9sCgRF18gKjqcruTOMh+o2IV3QHxSRdOAbmfafcCCFe5eAJDXzHnqRbiriA= Date: Thu, 19 Nov 2020 12:39:01 +0530 Message-ID: <94182d5716e46be949b7f17a936e7c7e@mail.gmail.com> Subject: RE: [PATCH V4 12/12] scsi: replace sdev->device_busy with sbitmap To: Ming Lei Cc: kernel test robot , Sumanesh Samanta , Jens Axboe , linux-block@vger.kernel.org, "Martin K . Petersen" , linux-scsi@vger.kernel.org, kbuild-all@lists.01.org, clang-built-linux@googlegroups.com, Omar Sandoval , "Ewan D . Milne" , Hannes Reinecke Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000002de47a05b4706721" Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org --0000000000002de47a05b4706721 Content-Type: text/plain; charset="UTF-8" > > /** > > * megasas_get_cmd_fusion - Get a command from the free pool > > * @instance: Adapter soft state > > @@ -359,10 +385,7 @@ megasas_get_msix_index(struct megasas_instance > > *instance, { > > int sdev_busy; > > > > - /* TBD - if sml remove device_busy in future, driver > > - * should track counter in internal structure. > > - */ > > - sdev_busy = atomic_read(&scmd->device->device_busy); > > + sdev_busy = megasas_sdev_busy_read(scmd); > > The above is only used for MR_BALANCED_PERF_MODE, so maybe you can > skip inc/dec/read the counter for other perf mode. Agree. I have created V2. Subject: [PATCH] megaraid_sas: v2 replace sdev_busy with local counter use local tracking of per sdev outstanding command since sdev_busy in SML is improved for peformance reason using sbitmap (earlier it was atomic variable). Signed-off-by: Kashyap Desai --- drivers/scsi/megaraid/megaraid_sas.h | 2 + drivers/scsi/megaraid/megaraid_sas_fusion.c | 51 +++++++++++++++++---- 2 files changed, 45 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 0f808d63580e..0c6a56b24c6e 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -2019,10 +2019,12 @@ union megasas_frame { * struct MR_PRIV_DEVICE - sdev private hostdata * @is_tm_capable: firmware managed tm_capable flag * @tm_busy: TM request is in progress + * @sdev_priv_busy: pending command per sdev */ struct MR_PRIV_DEVICE { bool is_tm_capable; bool tm_busy; + atomic_t sdev_priv_busy; atomic_t r1_ldio_hint; u8 interface_type; u8 task_abort_tmo; diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index fd607287608e..c630404cbb2d 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -220,6 +220,44 @@ megasas_clear_intr_fusion(struct megasas_instance *instance) return 1; } +static inline void +megasas_sdev_busy_inc(struct megasas_instance *instance, + struct scsi_cmnd *scmd) +{ + struct MR_PRIV_DEVICE *mr_device_priv_data; + + if (instance->perf_mode != MR_BALANCED_PERF_MODE) + return; + + mr_device_priv_data = scmd->device->hostdata; + atomic_inc(&mr_device_priv_data->sdev_priv_busy); +} +static inline void +megasas_sdev_busy_dec(struct megasas_instance *instance, + struct scsi_cmnd *scmd) +{ + struct MR_PRIV_DEVICE *mr_device_priv_data; + + if (instance->perf_mode != MR_BALANCED_PERF_MODE) + return; + + mr_device_priv_data = scmd->device->hostdata; + atomic_dec(&mr_device_priv_data->sdev_priv_busy); +} +static inline int +megasas_sdev_busy_read(struct megasas_instance *instance, + struct scsi_cmnd *scmd) +{ + struct MR_PRIV_DEVICE *mr_device_priv_data; + + if (instance->perf_mode != MR_BALANCED_PERF_MODE) + return 0; + + mr_device_priv_data = scmd->device->hostdata; + return atomic_read(&mr_device_priv_data->sdev_priv_busy); +} + + /** * megasas_get_cmd_fusion - Get a command from the free pool * @instance: Adapter soft state @@ -357,15 +395,9 @@ megasas_get_msix_index(struct megasas_instance *instance, struct megasas_cmd_fusion *cmd, u8 data_arms) { - int sdev_busy; - - /* TBD - if sml remove device_busy in future, driver - * should track counter in internal structure. - */ - sdev_busy = atomic_read(&scmd->device->device_busy); - if (instance->perf_mode == MR_BALANCED_PERF_MODE && - sdev_busy > (data_arms * MR_DEVICE_HIGH_IOPS_DEPTH)) { + (megasas_sdev_busy_read(instance, scmd) > + (data_arms * MR_DEVICE_HIGH_IOPS_DEPTH))) { cmd->request_desc->SCSIIO.MSIxIndex = mega_mod64((atomic64_add_return(1, &instance->high_iops_outstanding) / MR_HIGH_IOPS_BATCH_COUNT), instance->low_latency_index_start); @@ -3390,6 +3422,7 @@ megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance, * Issue the command to the FW */ + megasas_sdev_busy_inc(instance, scmd); megasas_fire_cmd_fusion(instance, req_desc); if (r1_cmd) @@ -3450,6 +3483,7 @@ megasas_complete_r1_command(struct megasas_instance *instance, scmd_local->SCp.ptr = NULL; megasas_return_cmd_fusion(instance, cmd); scsi_dma_unmap(scmd_local); + megasas_sdev_busy_dec(instance, scmd_local); scmd_local->scsi_done(scmd_local); } } @@ -3550,6 +3584,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex, scmd_local->SCp.ptr = NULL; megasas_return_cmd_fusion(instance, cmd_fusion); scsi_dma_unmap(scmd_local); + megasas_sdev_busy_dec(instance, scmd_local); scmd_local->scsi_done(scmd_local); } else /* Optimal VD - R1 FP command completion. */ megasas_complete_r1_command(instance, cmd_fusion); -- > > > > Thanks, > Ming --0000000000002de47a05b4706721 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: 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