From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753076AbdDLK6o (ORCPT ); Wed, 12 Apr 2017 06:58:44 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44692 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752432AbdDLK6m (ORCPT ); Wed, 12 Apr 2017 06:58:42 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 36EEA3B714 Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jolsa@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 36EEA3B714 Date: Wed, 12 Apr 2017 12:58:39 +0200 From: Jiri Olsa To: Jin Yao Cc: acme@kernel.org, jolsa@kernel.org, peterz@infradead.org, mingo@redhat.com, alexander.shishkin@linux.intel.com, Linux-kernel@vger.kernel.org, ak@linux.intel.com, kan.liang@intel.com, yao.jin@intel.com, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH v4 0/5] perf report: Show branch type Message-ID: <20170412105839.GC14409@krava> References: <1491949266-6835-1-git-send-email-yao.jin@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1491949266-6835-1-git-send-email-yao.jin@linux.intel.com> User-Agent: Mutt/1.8.0 (2017-02-23) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Wed, 12 Apr 2017 10:58:42 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 12, 2017 at 06:21:01AM +0800, Jin Yao wrote: SNIP > > 3. Use 2 bits in perf_branch_entry for a "cross" metrics checking > for branch cross 4K or 2M area. It's an approximate computing > for checking if the branch cross 4K page or 2MB page. > > For example: > > perf record -g --branch-filter any,save_type > > perf report --stdio > > JCC forward: 27.7% > JCC backward: 9.8% > JMP: 0.0% > IND_JMP: 6.5% > CALL: 26.6% > IND_CALL: 0.0% > RET: 29.3% > IRET: 0.0% > CROSS_4K: 0.0% > CROSS_2M: 14.3% got mangled perf report --stdio output for: [root@ibm-x3650m4-02 perf]# ./perf record -j any,save_type kill kill: not enough arguments [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.013 MB perf.data (18 samples) ] [root@ibm-x3650m4-02 perf]# ./perf report --stdio -f | head -30 # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 253 of event 'cycles' # Event count (approx.): 253 # # Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles # ........ ....... .................... ....................................... ....................................... .................. # 8.30% perf Um [kernel.vmlinux] [k] __intel_pmu_enable_all.constprop.17 [k] native_write_msr - 7.91% perf Um [kernel.vmlinux] [k] intel_pmu_lbr_enable_all [k] __intel_pmu_enable_all.constprop.17 - 7.91% perf Um [kernel.vmlinux] [k] native_write_msr [k] intel_pmu_lbr_enable_all - 6.32% kill libc-2.24.so [.] _dl_addr [.] _dl_addr - 5.93% perf Um [kernel.vmlinux] [k] perf_iterate_ctx [k] perf_iterate_ctx - 2.77% kill libc-2.24.so [.] malloc [.] malloc - 1.98% kill libc-2.24.so [.] _int_malloc [.] _int_malloc - 1.58% kill [kernel.vmlinux] [k] __rb_insert_augmented [k] __rb_insert_augmented - 1.58% perf Um [kernel.vmlinux] [k] perf_event_exec [k] perf_event_exec - 1.19% kill [kernel.vmlinux] [k] anon_vma_interval_tree_insert [k] anon_vma_interval_tree_insert - 1.19% kill [kernel.vmlinux] [k] free_pgd_range [k] free_pgd_range - 1.19% kill [kernel.vmlinux] [k] n_tty_write [k] n_tty_write - 1.19% perf Um [kernel.vmlinux] [k] native_sched_clock [k] sched_clock - ... SNIP jirka