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 9FF14C433EF for ; Sat, 4 Jun 2022 04:29:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350468AbiFDE3A (ORCPT ); Sat, 4 Jun 2022 00:29:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350460AbiFDE26 (ORCPT ); Sat, 4 Jun 2022 00:28:58 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 805EC37A0B for ; Fri, 3 Jun 2022 21:28:54 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id b5so8120802plx.10 for ; Fri, 03 Jun 2022 21:28:54 -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=1GFA/G2sq7Z7tV5kUwDR4JNQSunfwujtW0Pzethicqk=; b=dd5N4KgOOFen57SswJKMlpRQyZoOXZwv6XG6ilJNw4tVJiHvKVjis+OTi+zzt+nGwQ kIByE3Gg9CVnPsWv1hLXqeQPZuryFe3qt9EHPKnlhynd7asQ64gBQl1upPd2aITKm/uy VxGaUvrXSMrlwgz9bzYyTLjDkIBewZ/kYvJti5UVfHFet/C/gIk+ipcclx0vmHcKyUhw 52n3cOlRbwBqkcbYLGXDyQKXyZmstWrYuwxa9+1eqE9ea8yHRJ+K9GOIWj1a2Xrs+37z lqdtJVAxGQWQyg//p6/dYRrrC7Wn2YtAtbotdUARaXJAxdqkI1qFLvT46dkDxDGEMXsW bNWg== 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=1GFA/G2sq7Z7tV5kUwDR4JNQSunfwujtW0Pzethicqk=; b=LyQ6doQQ4ydwVpAfX91R8440jXYLiMvvkzkY8RToPyfvKVUMRGERDjWIaZShiQbWEr pl+hOS+Eb/5d/4NJxf3JB7vRNJ76nZ0VOtbE2+a9frPXw9AklAyvaLtm6He/IjwXk2+O xxMup1xhsfpPLfXomGJjKY3om3ynFWC+vbvfMB1eqzxTauxZs8FxziXTed9zellD75aJ IJVhX7Gws1Z4lldsiv4osjGIyjhQHNG+v5T/kgK3R2gZr7kpJqtWObe97j5MmkxVaX5x 9PYTvWZudavFXqIsvvfN4elgD2HKBcwt3/7RdEOcVpmC7SeS/i7+INLlO1u/G4ukrqZ5 WwVA== X-Gm-Message-State: AOAM530DKHUwi7tAa3Gm/p5RBwvFBmwwt2YCzVzk9DeiYGJNZctH/xFJ YF1hYb/l/TTOyAOovaEv/GvuSg== X-Google-Smtp-Source: ABdhPJw+tOYyDFUf+277NXZH+SE7nfaTTpIOiGfuiMRFRQJf1KdhW3jfVV02quE2xe+Nks49lWYAAg== X-Received: by 2002:a17:90a:fd87:b0:1e2:cdfc:cbd3 with SMTP id cx7-20020a17090afd8700b001e2cdfccbd3mr35605758pjb.28.1654316933882; Fri, 03 Jun 2022 21:28:53 -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.304.2022.06.03.21.28.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jun 2022 21:28:53 -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 Subject: [PATCH v5 02/17] perf tools: sync addition of PERF_MEM_SNOOPX_PEER Date: Sat, 4 Jun 2022 12:28:05 +0800 Message-Id: <20220604042820.2270916-3-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 --- tools/include/uapi/linux/perf_event.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index d37629dbad72..7b88bfd097dc 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/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