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 C24F8C433EF for ; Tue, 17 May 2022 02:04:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238716AbiEQCEc (ORCPT ); Mon, 16 May 2022 22:04:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235142AbiEQCEZ (ORCPT ); Mon, 16 May 2022 22:04:25 -0400 Received: from smtp-fw-80006.amazon.com (smtp-fw-80006.amazon.com [99.78.197.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE23B4506D; Mon, 16 May 2022 19:04:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1652753064; x=1684289064; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=g7YWa84Ggc9PbBc2yEEwZ6f7hUrSoU1ylmKnDzAKmLc=; b=Rz4oDfQxE/fynkx1ZKxzq1lXBMq61MnbjVNLbOykMJ6cnFyVhZeYZ/Ns bdi1QMVLJYvWRIYpjHyWwp2o/eJyCyv1i6O1FTpvDd9L/v5Wn/jG4aXJn 6RmDLMxN11sAT4+TxAET2aqN1sg93GUCd1ACR19gYYBx6plGO45qMGUsc I=; X-IronPort-AV: E=Sophos;i="5.91,231,1647302400"; d="scan'208";a="88992578" Received: from pdx4-co-svc-p1-lb2-vlan3.amazon.com (HELO email-inbound-relay-iad-1d-54a073b7.us-east-1.amazon.com) ([10.25.36.214]) by smtp-border-fw-80006.pdx80.corp.amazon.com with ESMTP; 17 May 2022 02:04:21 +0000 Received: from EX13MTAUWB001.ant.amazon.com (iad12-ws-svc-p26-lb9-vlan3.iad.amazon.com [10.40.163.38]) by email-inbound-relay-iad-1d-54a073b7.us-east-1.amazon.com (Postfix) with ESMTPS id 05054844E9; Tue, 17 May 2022 02:04:14 +0000 (UTC) Received: from EX13D02UWC002.ant.amazon.com (10.43.162.6) by EX13MTAUWB001.ant.amazon.com (10.43.161.249) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Tue, 17 May 2022 02:03:34 +0000 Received: from EX13MTAUEE002.ant.amazon.com (10.43.62.24) by EX13D02UWC002.ant.amazon.com (10.43.162.6) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Tue, 17 May 2022 02:03:34 +0000 Received: from dev-dsk-alisaidi-1d-b9a0e636.us-east-1.amazon.com (172.19.181.128) by mail-relay.amazon.com (10.43.62.224) with Microsoft SMTP Server id 15.0.1497.32 via Frontend Transport; Tue, 17 May 2022 02:03:33 +0000 Received: by dev-dsk-alisaidi-1d-b9a0e636.us-east-1.amazon.com (Postfix, from userid 5131138) id 9182D2152; Tue, 17 May 2022 02:03:33 +0000 (UTC) From: Ali Saidi To: , , , , , CC: , , , , , , , , , , , , , , , Subject: [PATCH v9 2/5] perf tools: sync addition of PERF_MEM_SNOOPX_PEER Date: Tue, 17 May 2022 02:03:23 +0000 Message-ID: <20220517020326.18580-3-alisaidi@amazon.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220517020326.18580-1-alisaidi@amazon.com> References: <20220517020326.18580-1-alisaidi@amazon.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 */ -- 2.32.0