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 A2E40ECAAA3 for ; Fri, 26 Aug 2022 06:06:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244493AbiHZGGJ (ORCPT ); Fri, 26 Aug 2022 02:06:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244950AbiHZGGG (ORCPT ); Fri, 26 Aug 2022 02:06:06 -0400 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E04F5C96D for ; Thu, 25 Aug 2022 23:06:05 -0700 (PDT) Received: by mail-pj1-x1036.google.com with SMTP id r15-20020a17090a1bcf00b001fabf42a11cso588472pjr.3 for ; Thu, 25 Aug 2022 23:06:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc; bh=VXo2//TDP+/ELV3UW1U6JUD/1LVXb50gfq3HIYQkvt4=; b=voAi8tuq7u9AyLAzIWKQVgyqkE9QFwN3FGESj+AUoBS+uAHIvayWoaN0StWADnMpwd PcWLGNdwCLV0VPf8/LkgE+1Oisc8mpYoERQKGGdRRPgYGlgkMBJqjs9vlgS7sCkrIHyl E6qpvqOgQb8if2AdsrtoKAYd5N3EHHW7Sq9YdVi0HFxETVPrQB/59G/6IDdfl+UM3IeA H9mrJqhH+ih3BchON1qn5+/FA1KtmtsE1v4HLlaXVaDukEXxpEdyjPJJ9KM7kGPW/dOs bU14CF9tm8pGSSksMcb0e0eDMZgYfy2btPU451mBxSNYXdNKEnWbr+xHWol8rHvnhEqd AnOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc; bh=VXo2//TDP+/ELV3UW1U6JUD/1LVXb50gfq3HIYQkvt4=; b=CWqXkl3XzJ4vwLVSUlK6X3yV3x9rU486abnaDasVnbKiqstCYK+PtlWtj83+wonWnD a0SbIrfDyacY97M6Z0THCJm+vdQXKP2SBmLqpI/1N+eHvdBX/Ia6Qs/K5XMC4Jwcnsr+ 5PUmH/XbQ0UKvtmOqhgMrO9nxxZD+Ec/peNIrxosNYfl9foSeaJb+/KW9yFfGDExR2mH CnJyJdgLh+FmrlLOL2UytWFI3BL+Q9EYn2R/ErjUOVEgmVG6tEra/C4YOiWi0GLgQb3O xx0esF3vzPV/JUzmWAuTxWM4rxZ5EQk4V52PQgYybRVgpzKP2EtL9oHNkuH0d1/IgLLj +f5w== X-Gm-Message-State: ACgBeo24gdOYfqAAs0DLwpXg/7VQ5BkAD8+kCEHgZCABdnpvxNosqtnD aQDBz59wbzsB5dKhdBE38x9gXg== X-Google-Smtp-Source: AA6agR7ZKiL45YiejpzMG9FwieAWnnXLWMY1ju0WMQfyFJw1VO/w0kRRLN+eP5oDi1hffzpK1aReLQ== X-Received: by 2002:a17:90b:4d8f:b0:1fc:314a:17e8 with SMTP id oj15-20020a17090b4d8f00b001fc314a17e8mr2855044pjb.152.1661493964469; Thu, 25 Aug 2022 23:06:04 -0700 (PDT) Received: from localhost (n058152048222.netvigator.com. [58.152.48.222]) by smtp.gmail.com with ESMTPSA id bb5-20020a170902bc8500b0016db7f49cc2sm625338plb.115.2022.08.25.23.06.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Aug 2022 23:06:03 -0700 (PDT) From: Leo Yan To: Peter Zijlstra , Arnaldo Carvalho de Melo , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ali Saidi , Leo Yan , Kajol Jain Subject: [PATCH v7] perf: Add SNOOP_PEER flag to perf mem data struct Date: Fri, 26 Aug 2022 14:05:56 +0800 Message-Id: <20220826060556.176681-1-leo.yan@linaro.org> X-Mailer: git-send-email 2.34.1 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. Update notes: This patch is to sync the headers between kernel and user space, commit 2e21bcf0514a ("perf tools: Sync addition of PERF_MEM_SNOOPX_PEER") for updating kernel header has been merged in the mainline code. Signed-off-by: Ali Saidi Reviewed-by: Leo Yan Reviewed-by: Kajol Jain Signed-off-by: Leo Yan --- Changes from v6: Added Leo's SoB. 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 03b370062741..581ed4bdc062 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -1313,7 +1313,7 @@ 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 */ -- 2.34.1