From patchwork Wed May 4 18:48:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ali Saidi X-Patchwork-Id: 12838395 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 BD1B2C433F5 for ; Wed, 4 May 2022 18:50:17 +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=1K65bKKOj31JD9CtQxCR1/bWWWFI1RdjF7HuxgYlq+s=; b=YACrvEnUTW/VcY JGmn8/LpcD3jC/RTbS58p1Wz0oLlsD5DDnA3QLhDUM9m7rq8HIQPP0F2uEbog8iVFcMuBN7qbpAt1 7MhXy7POmCZ5sX6xP0FnBeHfrpPThW43vCDnSU54LOMkDK+yN7Yyjet5aJ8JGg2DDyTr2Id8LAo/n zTBthPvKGZRcJ3CRSMsoWm+vZf6+dMu951o9QWyXwkMzfA/HpdjnP9PLCqLwf8Xwdc3p7ECpXB9Bn M39mA49ig7LLhfqFTqkdWwIRqIG4LqnE9JRIyFYnPwpCLV6zU1PuUj2sosL4pHDwaINrdwOBfpBcm L55qGppI9mIqRz3fDORw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nmK3i-00CCnD-MK; Wed, 04 May 2022 18:49:10 +0000 Received: from smtp-fw-9103.amazon.com ([207.171.188.200]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nmK3d-00CCjh-Jy for linux-arm-kernel@lists.infradead.org; Wed, 04 May 2022 18:49:08 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1651690145; x=1683226145; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=g7YWa84Ggc9PbBc2yEEwZ6f7hUrSoU1ylmKnDzAKmLc=; b=XXzIMgtepEYD+CYuA7huLpgnZdcKzvsin1quAC6tGEsfRchUu9L147Dg PTKk24e1y8M1yShjv/mvLi4Z9vX0h8pA9sJNUN8nfFNN2irTyTCh927RG f6gzSoLkA8/IhcDM9ys627MZMq9TZicbrrlVSqYkeOCJwUhBI5NjPiHtW c=; X-IronPort-AV: E=Sophos;i="5.91,198,1647302400"; d="scan'208";a="1012911869" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO email-inbound-relay-pdx-2c-7d0c7241.us-west-2.amazon.com) ([10.25.36.210]) by smtp-border-fw-9103.sea19.amazon.com with ESMTP; 04 May 2022 18:48:59 +0000 Received: from EX13MTAUWB001.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-pdx-2c-7d0c7241.us-west-2.amazon.com (Postfix) with ESMTPS id 30E3C41AFE; Wed, 4 May 2022 18:48:59 +0000 (UTC) Received: from EX13D02UWB003.ant.amazon.com (10.43.161.48) by EX13MTAUWB001.ant.amazon.com (10.43.161.249) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Wed, 4 May 2022 18:48:59 +0000 Received: from EX13MTAUWA001.ant.amazon.com (10.43.160.58) by EX13D02UWB003.ant.amazon.com (10.43.161.48) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Wed, 4 May 2022 18:48:58 +0000 Received: from dev-dsk-alisaidi-1d-b9a0e636.us-east-1.amazon.com (172.19.181.128) by mail-relay.amazon.com (10.43.160.118) with Microsoft SMTP Server id 15.0.1497.32 via Frontend Transport; Wed, 4 May 2022 18:48:58 +0000 Received: by dev-dsk-alisaidi-1d-b9a0e636.us-east-1.amazon.com (Postfix, from userid 5131138) id 766BD17AC; Wed, 4 May 2022 18:48:57 +0000 (UTC) From: Ali Saidi To: , , , , , CC: , , , , , , , , , , , , , , , Subject: [PATCH v8 2/5] perf tools: sync addition of PERF_MEM_SNOOPX_PEER Date: Wed, 4 May 2022 18:48:47 +0000 Message-ID: <20220504184850.24986-3-alisaidi@amazon.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220504184850.24986-1-alisaidi@amazon.com> References: <20220504184850.24986-1-alisaidi@amazon.com> MIME-Version: 1.0 Precedence: Bulk X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220504_114905_779354_F6D71BFD X-CRM114-Status: GOOD ( 14.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 Reviewed-By: Kajol Jain --- 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 */