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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A198C43334 for ; Sat, 4 Jun 2022 04:28:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350441AbiFDE2w (ORCPT ); Sat, 4 Jun 2022 00:28:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350435AbiFDE2t (ORCPT ); Sat, 4 Jun 2022 00:28:49 -0400 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5EE1C35DEB for ; Fri, 3 Jun 2022 21:28:48 -0700 (PDT) Received: by mail-pg1-x533.google.com with SMTP id h192so1888277pgc.4 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=ccOenSbUcW08QcwFH8plXQSswuT3jczBWkJaLbPSr96RbzE8dzZRbaCT7NzrLI5Tuk 4gS885IwVNgCdkNm5gkOH0e4l2P0TW2dPUugdi/y9/1+ahFMhxt7x2sfxKt2xFtXBvd8 a0B2002M4vqp8zrMu1Af7Y5Z4s4JwrPQwVK5Aws+ZqXwl2BE5d/JDpPMBNpMtzNxBaAu kDMaE6QsrIkWPtkrPwfzBfzjI2GOEIjHa8kiAHlLwv+d4dRwaRTI6w+UwL/7rMnkANNr j5m2O7bw1OKGrr3xTmlvcZU0gWCSiGSzUb/iKl63Gi2t/Ip8yZ/lrmvnLE+F1QlVVH1L 5uqw== X-Gm-Message-State: AOAM530+R6eHBI6zSnGCGPkkBQTJubKiLzhSWJJiXBnWKn3ddaqku3F4 7cZGGi9JOFRc6cZMRkm1wWIlvg== 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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@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