From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752216AbbEGW5l (ORCPT ); Thu, 7 May 2015 18:57:41 -0400 Received: from mga03.intel.com ([134.134.136.65]:36787 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751925AbbEGW4m (ORCPT ); Thu, 7 May 2015 18:56:42 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,386,1427785200"; d="scan'208";a="490798979" From: Andi Kleen To: peterz@infradead.org Cc: kan.liang@intel.com, eranian@google.com, acme@infradead.org, linux-kernel@vger.kernel.org, Andi Kleen Subject: [PATCH 4/9] perf: Add cycles to branch_info Date: Thu, 7 May 2015 15:56:27 -0700 Message-Id: <1431039392-12589-5-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1431039392-12589-1-git-send-email-andi@firstfloor.org> References: <1431039392-12589-1-git-send-email-andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen Skylake supports reporting the time in cycles a branch in the LBR took, to give a rough indication of the basic block performance. Export the cycle information in the branch_info structure. This can be done by just reusing some currently zero padding. This is just the generic header change. The architecture still needs to fill it in. There's no attempt to convert to real time, as we really want cycles here. Signed-off-by: Andi Kleen --- include/uapi/linux/perf_event.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index 309211b..9ef489e 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -904,6 +904,7 @@ union perf_mem_data_src { * * in_tx: running in a hardware transaction * abort: aborting a hardware transaction + * cycles: cycles from last branch (or 0 if not supported) */ struct perf_branch_entry { __u64 from; @@ -912,7 +913,8 @@ struct perf_branch_entry { predicted:1,/* target predicted */ in_tx:1, /* in transaction */ abort:1, /* transaction abort */ - reserved:60; + cycles:16, /* cycle count to last branch */ + reserved:44; }; #endif /* _UAPI_LINUX_PERF_EVENT_H */ -- 1.9.3