From patchwork Thu Dec 10 20:35:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Don Brace X-Patchwork-Id: 11966449 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=-13.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 AADD8C4361B for ; Thu, 10 Dec 2020 20:37:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7736223E25 for ; Thu, 10 Dec 2020 20:37:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403944AbgLJUg6 (ORCPT ); Thu, 10 Dec 2020 15:36:58 -0500 Received: from esa.microchip.iphmx.com ([68.232.154.123]:60521 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2393794AbgLJUgw (ORCPT ); Thu, 10 Dec 2020 15:36:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1607632612; x=1639168612; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4PrWsgr3eFyPtyEttswxAW2fkO7U1zm3cTk6CQy7pro=; b=ULR4h85N26RJigcfLN3tQuUDozuzXDnIs+DWstEr+gs0n19unpkmZ0Vh 6hAQCWF9xf1OpYALFvsjxqizM6jy4CpCOamj/7bxIzpUUUZIXGZn1b1Z2 dC95eJyf1+F83CIvA7b7C+ZZzS6+Tw5p6EYnD3dqysdBEpjrNsLRNce9b 2fRAhtPyMN5FtkSVWgm+FaW2YPRm1tmBhaoD9Nr/jd6tNkHjda4Por9wp e+Ka/Bprd8wiOneTmCEzPuE+RolAptLdoKvuWqybPaPTcs6F339DnN8gH VLjXRfAXsFAON6yhT6OpddKaE1owlunW10Pu1PrNF8VMrmSEs62Hzr7Fd Q==; IronPort-SDR: XzNiTkdaHBxBP/fw1xwoqtk4ow4XM02OzcooztjeoxBlC/e/RgK60jeIqHRfrpLfp9ASgoIFLz jcI84GcCSc0pvKxReEWEi1bpvtwAPZkxskBIlUeCrEKR2VQ8q1GxHfebygro5rjYjKCJap1dqk YhrrHh2uHSZetbm/ljjIiezwqWGqtPpBmvTn1MwTxBVt81SwJQiIKCaxCDGY8C/v09o+GK19MH Y8Ft/uKsrZd3qGXeoE8dCHRAzrDyk+SV4fSqG0A8B0WfXlI3oE3LhsIimHeEa94J1ZuGQ6DdIP C44= X-IronPort-AV: E=Sophos;i="5.78,409,1599548400"; d="scan'208";a="96675037" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 10 Dec 2020 13:35:36 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Thu, 10 Dec 2020 13:35:19 -0700 Received: from [127.0.1.1] (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Thu, 10 Dec 2020 13:35:18 -0700 Subject: [PATCH V3 10/25] smartpqi: add stream detection From: Don Brace To: , , , , , , , , , CC: Date: Thu, 10 Dec 2020 14:35:18 -0600 Message-ID: <160763251860.26927.14463337801880165741.stgit@brunhilda> In-Reply-To: <160763241302.26927.17487238067261230799.stgit@brunhilda> References: <160763241302.26927.17487238067261230799.stgit@brunhilda> User-Agent: StGit/0.23-dirty MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org * Enhance performance by adding sequential stream detection. for R5/R6 sequential write requests. * Reduce stripe lock contention with full-stripe write operations. Reviewed-by: Scott Benesh Reviewed-by: Scott Teel Signed-off-by: Don Brace --- drivers/scsi/smartpqi/smartpqi.h | 8 +++ drivers/scsi/smartpqi/smartpqi_init.c | 87 +++++++++++++++++++++++++++++++-- 2 files changed, 89 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h index a5e271dd2742..343f06e44220 100644 --- a/drivers/scsi/smartpqi/smartpqi.h +++ b/drivers/scsi/smartpqi/smartpqi.h @@ -1042,6 +1042,12 @@ struct pqi_scsi_dev_raid_map_data { #define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0" +#define NUM_STREAMS_PER_LUN 8 + +struct pqi_stream_data { + u64 next_lba; + u32 last_accessed; +}; struct pqi_scsi_dev { int devtype; /* as reported by INQUIRY commmand */ @@ -1097,6 +1103,7 @@ struct pqi_scsi_dev { struct list_head add_list_entry; struct list_head delete_list_entry; + struct pqi_stream_data stream_data[NUM_STREAMS_PER_LUN]; atomic_t scsi_cmds_outstanding; atomic_t raid_bypass_cnt; }; @@ -1296,6 +1303,7 @@ struct pqi_ctrl_info { u8 enable_r5_writes : 1; u8 enable_r6_writes : 1; u8 lv_drive_type_mix_valid : 1; + u8 enable_stream_detection : 1; u8 ciss_report_log_flags; u32 max_transfer_encrypted_sas_sata; diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index fc8fafab480d..96383d047a88 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -5721,8 +5721,82 @@ void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd) atomic_dec(&device->scsi_cmds_outstanding); } -static int pqi_scsi_queue_command(struct Scsi_Host *shost, +static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd) +{ + u32 oldest_jiffies; + u8 lru_index; + int i; + int rc; + struct pqi_scsi_dev *device; + struct pqi_stream_data *pqi_stream_data; + struct pqi_scsi_dev_raid_map_data rmd; + + if (!ctrl_info->enable_stream_detection) + return false; + + rc = pqi_get_aio_lba_and_block_count(scmd, &rmd); + if (rc) + return false; + + /* Check writes only. */ + if (!rmd.is_write) + return false; + + device = scmd->device->hostdata; + + /* Check for RAID 5/6 streams. */ + if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6) + return false; + + /* + * If controller does not support AIO RAID{5,6} writes, need to send + * requests down non-AIO path. + */ + if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) || + (device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes)) + return true; + + lru_index = 0; + oldest_jiffies = INT_MAX; + for (i = 0; i < NUM_STREAMS_PER_LUN; i++) { + pqi_stream_data = &device->stream_data[i]; + /* + * Check for adjacent request or request is within + * the previous request. + */ + if ((pqi_stream_data->next_lba && + rmd.first_block >= pqi_stream_data->next_lba) && + rmd.first_block <= pqi_stream_data->next_lba + + rmd.block_cnt) { + pqi_stream_data->next_lba = rmd.first_block + + rmd.block_cnt; + pqi_stream_data->last_accessed = jiffies; + return true; + } + + /* unused entry */ + if (pqi_stream_data->last_accessed == 0) { + lru_index = i; + break; + } + + /* Find entry with oldest last accessed time. */ + if (pqi_stream_data->last_accessed <= oldest_jiffies) { + oldest_jiffies = pqi_stream_data->last_accessed; + lru_index = i; + } + } + + /* Set LRU entry. */ + pqi_stream_data = &device->stream_data[lru_index]; + pqi_stream_data->last_accessed = jiffies; + pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt; + + return false; +} + +static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd) { int rc; struct pqi_ctrl_info *ctrl_info; @@ -5768,11 +5842,12 @@ static int pqi_scsi_queue_command(struct Scsi_Host *shost, raid_bypassed = false; if (device->raid_bypass_enabled && !blk_rq_is_passthrough(scmd->request)) { - rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, - scmd, queue_group); - if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) { - raid_bypassed = true; - atomic_inc(&device->raid_bypass_cnt); + if (!pqi_is_parity_write_stream(ctrl_info, scmd)) { + rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group); + if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) { + raid_bypassed = true; + atomic_inc(&device->raid_bypass_cnt); + } } } if (!raid_bypassed)