From patchwork Thu Jun 20 10:52:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandrakanth Patil X-Patchwork-Id: 11006469 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 76928112C for ; Thu, 20 Jun 2019 10:53:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 675032864E for ; Thu, 20 Jun 2019 10:53:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5B6E128653; Thu, 20 Jun 2019 10:53:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 919F22864E for ; Thu, 20 Jun 2019 10:53:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730815AbfFTKxd (ORCPT ); Thu, 20 Jun 2019 06:53:33 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:44331 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726394AbfFTKxd (ORCPT ); Thu, 20 Jun 2019 06:53:33 -0400 Received: by mail-pg1-f196.google.com with SMTP id n2so1373804pgp.11 for ; Thu, 20 Jun 2019 03:53:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=3khMEVRvfV9H2xFDMNGgyBp8FnUlrLv4MwXzxtYS9tM=; b=fr4RSHOZkC3rO8SuK5g6PVZ4YgpL7JjbRSOBHtAUQ/BSpMdyf9xRUCl2EdN1wyw2If An0uGfQfPPx3LnBQH8op6+Y2HcY7dR0jcEj2GLTlw0BZEtv0bSeRqRdkauKx5gF/Q9V0 iTKljRxe6F+0byLJ+LPFO9LFGdfD9Ln88JarM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=3khMEVRvfV9H2xFDMNGgyBp8FnUlrLv4MwXzxtYS9tM=; b=qPUzzq7h6xgpfyiWuJ3DiRI5Xo5gaD2vPFQt31I5u+6W7fpz3nueFYLD5lTBjw22bP PEiH6iQJAzLwphXME5k1g4DG7FR+tBchfGsA2LMjBNT2G5DxJEz5UX+iQ5XB8Vy2B5da CFcmHG2eCMVXD1RJcmrbiAU0RfumeaT9jcFGc57obxj7C/PuWwVYoMbptLJv2gUpjYOr E9fBhKossJ1zrqE/+UA4ANxCj2i6yJXfo8hVt3CasTCPbvNIduk+0nRyferUW0rxqWNs dt0T6sR1UtvrQDq8kLnncSbAQxBSeIdwGDhfXWfpC0+vSekkUGitltx8mLRUKWPBZjCV nvqw== X-Gm-Message-State: APjAAAW/RyWp54CLm5CBpktYmjWfGPRF/ifqN3AwKegKKTs94vBeyQAb 9iNw+VLcq/4Nda2MEnGNslcuAnnO0NvAGT0ug8vgOx7amv8rtmN4pdv3kDk4WMpqyCdr+apUAcF Y0RsKDUB7Vt2AlGWpYeG+WoU1v72OqKkfRFr7/Q6NXN2RCIyLcUpw605MfgTVDBa9kKJLkdKQBR K9l1jDdJzo66Uf X-Google-Smtp-Source: APXvYqw25JihabwK+FohhyqSVvlCxO/GE90HORX9eOh7vRF4C2lNoZ0rpQ0PYcF92TDG+Wegbgd1cA== X-Received: by 2002:a62:ee05:: with SMTP id e5mr14191574pfi.117.1561028011921; Thu, 20 Jun 2019 03:53:31 -0700 (PDT) Received: from dhcp-10-123-20-30.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id l7sm24793995pfl.9.2019.06.20.03.53.29 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 20 Jun 2019 03:53:31 -0700 (PDT) From: Chandrakanth Patil To: linux-scsi@vger.kernel.org Cc: kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, kiran-kumar.kasturi@broadcom.com, sankar.patra@broadcom.com, sasikumar.pc@broadcom.com, shivasharan.srikanteshwara@broadcom.com, Chandrakanth Patil Subject: [PATCH v2 17/18] megaraid_sas: Introduce various Aero performance modes Date: Thu, 20 Jun 2019 16:22:07 +0530 Message-Id: <20190620105208.15011-18-chandrakanth.patil@broadcom.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20190620105208.15011-1-chandrakanth.patil@broadcom.com> References: <20190620105208.15011-1-chandrakanth.patil@broadcom.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For Aero adapters, driver provides three different performance modes controlled through module parameter named- 'perf_mode'. Below are those performance modes: 0: Balanced - Additional high IOPs reply queues will be enabled along with low latency queues. Interrupt coalescing will be enabled only for these high IOPs reply queues. 1: IOPs - No additional high IOPs queues are enabled. Interrupt coalescing will be enabled on all reply queues. 2: Latency - No additional high IOPs queues are enabled. Interrupt coalescing will be disabled on all reply queues. This is a legacy behavior similar to Ventura & Invader Series. Default performance mode settings: -Performance mode set to 'Balanced', if Aero controller is working in 16GT/s PCIe speed. -Performance mode will be set to 'Latency' mode for all other cases. Through module parameter- 'perf_mode', user can override default performance mode to desired one. Captured below some performance numbers with these performance modes. 4k Random Read IO performance numbers on 24 SAS SSD drives for above three permormance modes. Performance data is from Intel Skylake and HGST SS300 (drive model SDLL1DLR400GCCA1). IOPs: ----------------------------------------------------------------------- |perf_mode | qd = 1 | qd = 64 | note | |-------------|--------|---------|------------------------------------- |balanced | 259K | 3061k | Provides max performance numbers | | | | | both on lower QD workload & | | | | | also on higher QD workload | |-------------|--------|---------|------------------------------------- |iops | 220K | 3100k | Provides max performance numbers | | | | | only on higher QD workload. | |-------------|--------|---------|------------------------------------- |latency | 246k | 2226k | Provides good performance numbers | | | | | only on lower QD worklaod. | ----------------------------------------------------------------------- Average Latency: ----------------------------------------------------- |perf_mode | qd = 1 | qd = 64 | |-------------|--------------|----------------------| |balanced | 92.05 usec | 501.12 usec | |-------------|--------------|----------------------| |iops | 108.40 usec | 498.10 usec | |-------------|--------------|----------------------| |latency | 97.10 usec | 689.26 usec | ----------------------------------------------------- Signed-off-by: Sumit Saxena Signed-off-by: Chandrakanth Patil Reported-by: kbuild test robot Reported-by: Dan Carpenter --- drivers/scsi/megaraid/megaraid_sas.h | 14 ++++++- drivers/scsi/megaraid/megaraid_sas_base.c | 60 +++++++++++++++++++++++++---- drivers/scsi/megaraid/megaraid_sas_fusion.c | 22 +++++++---- 3 files changed, 81 insertions(+), 15 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 3f4cb52..0b38691 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -2256,6 +2256,18 @@ enum MR_PD_TYPE { #define MR_DEVICE_HIGH_IOPS_DEPTH 8 #define MR_HIGH_IOPS_BATCH_COUNT 16 +enum MR_PERF_MODE { + MR_BALANCED_PERF_MODE = 0, + MR_IOPS_PERF_MODE = 1, + MR_LATENCY_PERF_MODE = 2, +}; + +#define MEGASAS_PERF_MODE_2STR(mode) \ + ((mode) == MR_BALANCED_PERF_MODE ? "Balanced" : \ + (mode) == MR_IOPS_PERF_MODE ? "IOPs" : \ + (mode) == MR_LATENCY_PERF_MODE ? "Latency" : \ + "Unknown") + struct megasas_instance { unsigned int *reply_map; @@ -2441,7 +2453,7 @@ struct megasas_instance { bool support_seqnum_jbod_fp; bool support_pci_lane_margining; u8 low_latency_index_start; - bool balanced_mode; + int perf_mode; }; struct MR_LD_VF_MAP { diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index fec3e57..9233b22 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -105,6 +105,18 @@ unsigned int scmd_timeout = MEGASAS_DEFAULT_CMD_TIMEOUT; module_param(scmd_timeout, int, 0444); MODULE_PARM_DESC(scmd_timeout, "scsi command timeout (10-90s), default 90s. See megasas_reset_timer."); +int perf_mode = -1; +module_param(perf_mode, int, 0444); +MODULE_PARM_DESC(perf_mode, "Performance mode (only for Aero adapters), options:\n\t\t" + "0 - balanced: High iops and low latency queues are allocated &\n\t\t" + "interrupt coalescing is enabled only on high iops queues\n\t\t" + "1 - iops: High iops queues are not allocated &\n\t\t" + "interrupt coalescing is enabled on all queues\n\t\t" + "2 - latency: High iops queues are not allocated &\n\t\t" + "interrupt coalescing is disabled on all queues\n\t\t" + "default mode is 'balanced'" + ); + MODULE_LICENSE("GPL"); MODULE_VERSION(MEGASAS_VERSION); MODULE_AUTHOR("megaraidlinux.pdl@broadcom.com"); @@ -5472,7 +5484,7 @@ megasas_setup_irqs_ioapic(struct megasas_instance *instance) __func__, __LINE__); return -1; } - instance->balanced_mode = false; + instance->perf_mode = MR_LATENCY_PERF_MODE; instance->low_latency_index_start = 0; return 0; } @@ -5683,7 +5695,7 @@ megasas_set_high_iops_queue_affinity_hint(struct megasas_instance *instance) int i; int local_numa_node; - if (instance->balanced_mode) { + if (instance->perf_mode == MR_BALANCED_PERF_MODE) { local_numa_node = dev_to_node(&instance->pdev->dev); for (i = 0; i < instance->low_latency_index_start; i++) @@ -5726,11 +5738,12 @@ megasas_alloc_irq_vectors(struct megasas_instance *instance) i = __megasas_alloc_irq_vectors(instance); - if (instance->balanced_mode && (i != instance->msix_vectors)) { + if ((instance->perf_mode == MR_BALANCED_PERF_MODE) && + (i != instance->msix_vectors)) { if (instance->msix_vectors) pci_free_irq_vectors(instance->pdev); /*Disable Balanced IOPs mode and try realloc vectors*/ - instance->balanced_mode = false; + instance->perf_mode = MR_LATENCY_PERF_MODE; instance->low_latency_index_start = 1; num_msix_req = num_online_cpus() + instance->low_latency_index_start; @@ -5774,6 +5787,7 @@ static int megasas_init_fw(struct megasas_instance *instance) struct fusion_context *fusion; bool intr_coalescing; unsigned int num_msix_req; + u16 lnksta, speed; fusion = instance->ctrl_context; @@ -5983,11 +5997,43 @@ static int megasas_init_fw(struct megasas_instance *instance) if (intr_coalescing && (num_online_cpus() >= MR_HIGH_IOPS_QUEUE_COUNT) && (instance->msix_vectors == MEGASAS_MAX_MSIX_QUEUES)) - instance->balanced_mode = true; + instance->perf_mode = MR_BALANCED_PERF_MODE; else - instance->balanced_mode = false; + instance->perf_mode = MR_LATENCY_PERF_MODE; + + + if (instance->adapter_type == AERO_SERIES) { + pcie_capability_read_word(instance->pdev, PCI_EXP_LNKSTA, &lnksta); + speed = lnksta & PCI_EXP_LNKSTA_CLS; + + /* + * For Aero, if PCIe link speed is <16 GT/s, then driver should operate + * in latency perf mode and enable R1 PCI bandwidth algorithm + */ + if (speed < 0x4) { + instance->perf_mode = MR_LATENCY_PERF_MODE; + fusion->pcie_bw_limitation = true; + } + + /* + * Performance mode settings provided through module parameter-perf_mode will + * take affect only for: + * 1. Aero family of adapters. + * 2. When user sets module parameter- perf_mode in range of 0-2. + */ + if ((perf_mode >= MR_BALANCED_PERF_MODE) && + (perf_mode <= MR_LATENCY_PERF_MODE)) + instance->perf_mode = perf_mode; + /* + * If intr coalescing is not supported by controller FW, then IOPs + * and Balanced modes are not feasible. + */ + if (!intr_coalescing) + instance->perf_mode = MR_LATENCY_PERF_MODE; + + } - if (instance->balanced_mode) + if (instance->perf_mode == MR_BALANCED_PERF_MODE) instance->low_latency_index_start = MR_HIGH_IOPS_QUEUE_COUNT; else diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 90dced4..8a3e255 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -1097,10 +1097,10 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) if ((instance->low_latency_index_start == MR_HIGH_IOPS_QUEUE_COUNT) && cur_intr_coalescing) - instance->balanced_mode = true; + instance->perf_mode = MR_BALANCED_PERF_MODE; - dev_info(&instance->pdev->dev, "Balanced mode :%s\n", - instance->balanced_mode ? "Yes" : "No"); + dev_info(&instance->pdev->dev, "Performance mode :%s\n", + MEGASAS_PERF_MODE_2STR(instance->perf_mode)); instance->fw_sync_cache_support = (scratch_pad_1 & MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0; @@ -1190,9 +1190,17 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) * Each bit in replyqueue_mask represents one group of MSI-x vectors * (each group has 8 vectors) */ - if (instance->balanced_mode) + switch (instance->perf_mode) { + case MR_BALANCED_PERF_MODE: init_frame->replyqueue_mask = - cpu_to_le16(~(~0 << instance->low_latency_index_start / 8)); + cpu_to_le16(~(~0 << instance->low_latency_index_start/8)); + break; + case MR_IOPS_PERF_MODE: + init_frame->replyqueue_mask = + cpu_to_le16(~(~0 << instance->msix_vectors/8)); + break; + } + req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr)); req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr)); @@ -2831,7 +2839,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance, fp_possible = (io_info.fpOkForIo > 0) ? true : false; } - if (instance->balanced_mode && + if ((instance->perf_mode == MR_BALANCED_PERF_MODE) && atomic_read(&scp->device->device_busy) > (io_info.data_arms * MR_DEVICE_HIGH_IOPS_DEPTH)) cmd->request_desc->SCSIIO.MSIxIndex = @@ -3164,7 +3172,7 @@ megasas_build_syspd_fusion(struct megasas_instance *instance, cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle; - if (instance->balanced_mode && + if ((instance->perf_mode == MR_BALANCED_PERF_MODE) && atomic_read(&scmd->device->device_busy) > MR_DEVICE_HIGH_IOPS_DEPTH) cmd->request_desc->SCSIIO.MSIxIndex = mega_mod64((atomic64_add_return(1, &instance->high_iops_outstanding) /