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[54.67.95.58]) by smtp.gmail.com with ESMTPSA id w24-20020a1709027b9800b00163d4c3ffabsm6152916pll.304.2022.06.03.21.28.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jun 2022 21:28:47 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , Peter Zijlstra , Ingo Molnar , Mark Rutland , Jiri Olsa , Namhyung Kim , Ian Rogers , John Garry , Will Deacon , James Clark , German Gomez , Ali Saidi , Joe Mario , Adam Li , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Leo Yan , Kajol Jain Subject: [PATCH v5 01/17] perf: Add SNOOP_PEER flag to perf mem data struct Date: Sat, 4 Jun 2022 12:28:04 +0800 Message-Id: <20220604042820.2270916-2-leo.yan@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220604042820.2270916-1-leo.yan@linaro.org> References: <20220604042820.2270916-1-leo.yan@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ali Saidi Add a flag to the perf mem data struct to signal that a request caused a cache-to-cache transfer of a line from a peer of the requestor and wasn't sourced from a lower cache level. The line being moved from one peer cache to another has latency and performance implications. On Arm64 Neoverse systems the data source can indicate a cache-to-cache transfer but not if the line is dirty or clean, so instead of overloading HITM define a new flag that indicates this type of transfer. Signed-off-by: Ali Saidi Reviewed-by: Leo Yan Reviewed-by: Kajol Jain --- include/uapi/linux/perf_event.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index d37629dbad72..7b88bfd097dc 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -1310,7 +1310,7 @@ union perf_mem_data_src { #define PERF_MEM_SNOOP_SHIFT 19 #define PERF_MEM_SNOOPX_FWD 0x01 /* forward */ -/* 1 free */ +#define PERF_MEM_SNOOPX_PEER 0x02 /* xfer from peer */ #define PERF_MEM_SNOOPX_SHIFT 38 /* locked instruction */ -- 2.25.1 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3B85ECCA485 for ; Sat, 4 Jun 2022 04:30:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=OollAwrlpbhzgSSw/k8PHDcuzk45RD65HuovONApE7Y=; b=Hoh2Xke4IELEK5 sSqIxKVRmafQQfwPD83RCctmPsohLMGCjqH1gzdESxF6KK3JlY7LNyCbtrpaUNTrYnViK3g/XcXbU EXCAm9PQkhHAM7xB9VNbiAf9juTu3FPW6T4AJukFxNlIbNOb47VtMkPfRo33Tr4OUurq3rGIH7mBh XJmFWsFDHsRnyjoRKwg+ZZOT0x4/8hZAGDdnWC+MqCVMDRwBpnjj4ZOP6uD9wWsYU/J6LFhFhINgV /E9RQMUHB74igDRte0t+8DW3wsIFLgd2JHzUHxGzjABhMPJqoOcJQ2V0Kq9XjpXrXfMAGLMUTWAva jsrEPLgtR8r5XH9WWJEw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nxLPH-00ADvQ-HA; Sat, 04 Jun 2022 04:28:59 +0000 Received: from mail-pf1-x42c.google.com ([2607:f8b0:4864:20::42c]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nxLP7-00ADtp-2b for linux-arm-kernel@lists.infradead.org; Sat, 04 Jun 2022 04:28:50 +0000 Received: by mail-pf1-x42c.google.com with SMTP id 187so8555871pfu.9 for ; Fri, 03 Jun 2022 21:28:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Wc1YiV9uyUA6hUWTfhvQxLsnBAF4WMjPE/wOPDue8vY=; b=hlvAt+NKFQ93oLQE+Vc7CC1SciVNNaEIsz4OTmUYSw53+wN/88LcPvewlmeJcjqXYy xGnEzwNO8wU1Snp1WP1B9f9NwHHICuzVLy/kMdZy+bHh8L05GvVO01KGtZUYt33hvH+o GmMl0wyAXy5iFBMecOREOxexJjO7lDDILDeO7QsHanGXKIeCGZ0kEaftIpt8zpBcw8Ja vU5ng6WEB2+UfN05oKcuQ+z7AAMC/U3C4hCbrMyVe83VuLrsQVjIB4se1DubesMRInFm DIHSLpHgNLriaJfUci9gLg8jmUAQG+3T+8LohzfTvK0lJT6QAPO9iKsuQnN1p3rirA4+ g0sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Wc1YiV9uyUA6hUWTfhvQxLsnBAF4WMjPE/wOPDue8vY=; b=SNHVP4arzEJmgp96SwtsAVJpFqk/YuYgSYfqWIuWaaqbe/qiZCa+XUub9HI0tQbPz7 NIU3U1zQ0xMsG2xliggtfjxlfTkf+ZB7YJBf79p+eCS32KF/fdppEFwPnsrdHjKlqUpe yrBVsMw/xH4J194GvrKzubcUS8sCbNDe72U4HC/YRXzrIhzOeude0MvoeuBfyJuiiUvY fDp/CQL5fEaozqOZu7feKq+oxV83/ON3Ln6EwQKoTF4cBvGmg0bWPwcUjUXwCk+QLUBP SFv2T7IuW4VaZd5OGebUfTq4AjtwGYqHvUGBWL49MUEqiI2evnyX78/Y45QCrKWqVqB2 MoAw== X-Gm-Message-State: AOAM531B59r6T/WljeudEnsnI6Kb7X5QbzjA4Ee9om0ryd3R3bzLuDzS FZtY9i70cyRRg9ofWcZR0NfNEg== X-Google-Smtp-Source: ABdhPJyn3cqkMg0lACTzH2D0FR58K/46kMHeeMtnsgDgo1oVmKvzkM9jv8FNzFKJqNucvHfJJilpVQ== X-Received: by 2002:a05:6a00:21c8:b0:4c4:4bd:dc17 with SMTP id t8-20020a056a0021c800b004c404bddc17mr13233148pfj.57.1654316927721; Fri, 03 Jun 2022 21:28:47 -0700 (PDT) Received: from leo-build-box.lan (ec2-54-67-95-58.us-west-1.compute.amazonaws.com. [54.67.95.58]) by smtp.gmail.com with ESMTPSA id w24-20020a1709027b9800b00163d4c3ffabsm6152916pll.304.2022.06.03.21.28.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jun 2022 21:28:47 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , Peter Zijlstra , Ingo Molnar , Mark Rutland , Jiri Olsa , Namhyung Kim , Ian Rogers , John Garry , Will Deacon , James Clark , German Gomez , Ali Saidi , Joe Mario , Adam Li , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Leo Yan , Kajol Jain Subject: [PATCH v5 01/17] perf: Add SNOOP_PEER flag to perf mem data struct Date: Sat, 4 Jun 2022 12:28:04 +0800 Message-Id: <20220604042820.2270916-2-leo.yan@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220604042820.2270916-1-leo.yan@linaro.org> References: <20220604042820.2270916-1-leo.yan@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220603_212849_160472_7C456A3D X-CRM114-Status: GOOD ( 15.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Ali Saidi Add a flag to the perf mem data struct to signal that a request caused a cache-to-cache transfer of a line from a peer of the requestor and wasn't sourced from a lower cache level. The line being moved from one peer cache to another has latency and performance implications. On Arm64 Neoverse systems the data source can indicate a cache-to-cache transfer but not if the line is dirty or clean, so instead of overloading HITM define a new flag that indicates this type of transfer. Signed-off-by: Ali Saidi Reviewed-by: Leo Yan Reviewed-by: Kajol Jain --- include/uapi/linux/perf_event.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index d37629dbad72..7b88bfd097dc 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -1310,7 +1310,7 @@ union perf_mem_data_src { #define PERF_MEM_SNOOP_SHIFT 19 #define PERF_MEM_SNOOPX_FWD 0x01 /* forward */ -/* 1 free */ +#define PERF_MEM_SNOOPX_PEER 0x02 /* xfer from peer */ #define PERF_MEM_SNOOPX_SHIFT 38 /* locked instruction */ -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel