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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71A68C433EF for ; Thu, 18 Nov 2021 06:51:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5492361AA2 for ; Thu, 18 Nov 2021 06:51:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243457AbhKRGyc (ORCPT ); Thu, 18 Nov 2021 01:54:32 -0500 Received: from mga02.intel.com ([134.134.136.20]:15541 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243452AbhKRGyT (ORCPT ); Thu, 18 Nov 2021 01:54:19 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10171"; a="221340515" X-IronPort-AV: E=Sophos;i="5.87,243,1631602800"; d="scan'208";a="221340515" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2021 22:51:12 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,243,1631602800"; d="scan'208";a="495251025" Received: from zxingrtx.sh.intel.com ([10.239.159.110]) by orsmga007.jf.intel.com with ESMTP; 17 Nov 2021 22:51:09 -0800 From: zhengjun.xing@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, linux-kernel@vger.kernel.org Cc: adrian.hunter@intel.com, alexander.shishkin@intel.com, ak@linux.intel.com, kan.liang@intel.com, zhengjun.xing@linux.intel.com, stable@vger.kernel.org Subject: [PATCH] perf/x86/intel/uncore: Fix CAS_COUNT_WRITE issue for ICX Date: Thu, 18 Nov 2021 22:48:11 +0800 Message-Id: <20211118144811.329111-1-zhengjun.xing@linux.intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zhengjun Xing The user recently report a perf issue in the ICX platform, when test by perf event “uncore_imc_x/cas_count_write”,the write bandwidth is always very small (only 0.38MB/s), it is caused by the wrong "umask" for the "cas_count_write" event. When double-checking, find "cas_count_read" also is wrong. The public document for ICX uncore: https://www.intel.com/content/www/us/en/develop/download/3rd-gen-intel-xeon-processor-scalable-uncore-pm.html On page 142, Table 2-143, defines Unit Masks for CAS_COUNT: RD b00001111 WR b00110000 So Corrected both "cas_count_read" and "cas_count_write" for ICX. Old settings: hswep_uncore_imc_events INTEL_UNCORE_EVENT_DESC(cas_count_read, "event=0x04,umask=0x03") INTEL_UNCORE_EVENT_DESC(cas_count_write, "event=0x04,umask=0x0c") New settings: snr_uncore_imc_events INTEL_UNCORE_EVENT_DESC(cas_count_read, "event=0x04,umask=0x0f") INTEL_UNCORE_EVENT_DESC(cas_count_write, "event=0x04,umask=0x30"), Fixes: 2b3b76b5ec67 ("perf/x86/intel/uncore: Add Ice Lake server uncore support") Reviewed-by: Adrian Hunter Signed-off-by: Zhengjun Xing --- arch/x86/events/intel/uncore_snbep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index 5ddc0f30db6f..a6fd8eb410a9 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -5468,7 +5468,7 @@ static struct intel_uncore_type icx_uncore_imc = { .fixed_ctr_bits = 48, .fixed_ctr = SNR_IMC_MMIO_PMON_FIXED_CTR, .fixed_ctl = SNR_IMC_MMIO_PMON_FIXED_CTL, - .event_descs = hswep_uncore_imc_events, + .event_descs = snr_uncore_imc_events, .perf_ctr = SNR_IMC_MMIO_PMON_CTR0, .event_ctl = SNR_IMC_MMIO_PMON_CTL0, .event_mask = SNBEP_PMON_RAW_EVENT_MASK, -- 2.25.1