Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935893Ab3DPPyh (ORCPT ); Tue, 16 Apr 2013 11:54:37 -0400 Received: from e23smtp04.au.ibm.com ([202.81.31.146]:50668 "EHLO e23smtp04.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933788Ab3DPPyg (ORCPT ); Tue, 16 Apr 2013 11:54:36 -0400 From: Anshuman Khandual To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org Cc: michael@ellerman.id.au, mikey@neuling.org Subject: [PATCH V2 0/5] powerpc, perf: BHRB based branch stack enablement on POWER8 Date: Tue, 16 Apr 2013 21:24:05 +0530 Message-Id: <1366127650-1952-1-git-send-email-khandual@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.11.7 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13041615-9264-0000-0000-000003894EC1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2957 Lines: 54 Branch History Rolling Buffer (BHRB) is a new PMU feaure in IBM POWER8 processor which records the branch instructions inside the execution pipeline. This patchset enables the basic functionality of the feature through generic perf branch stack sampling framework. Sample output ------------- $./perf record -b top $./perf report Overhead Command Source Shared Object Source Symbol Target Shared Object Target Symbol # ........ ....... .................... ...................................... .................... ................................... # 7.82% top libc-2.11.2.so [k] _IO_vfscanf libc-2.11.2.so [k] _IO_vfscanf 6.17% top libc-2.11.2.so [k] _IO_vfscanf [unknown] [k] 00000000 2.37% top [unknown] [k] 0xf7aafb30 [unknown] [k] 00000000 1.80% top [unknown] [k] 0x0fe07978 libc-2.11.2.so [k] _IO_vfscanf 1.60% top libc-2.11.2.so [k] _IO_vfscanf [kernel.kallsyms] [k] .do_task_stat 1.20% top [kernel.kallsyms] [k] .do_task_stat [kernel.kallsyms] [k] .do_task_stat 1.02% top libc-2.11.2.so [k] vfprintf libc-2.11.2.so [k] vfprintf 0.92% top top [k] _init [unknown] [k] 0x0fe037f4 Changes in V2 -------------- - Added copyright messages to the newly created files - Modified couple of commit messages Anshuman Khandual (5): powerpc, perf: Add new BHRB related instructions on POWER8 powerpc, perf: Add basic assembly code to read BHRB entries on POWER8 powerpc, perf: Add new BHRB related generic functions, data and flags powerpc, perf: Define BHRB generic functions, data and flags for POWER8 powerpc, perf: Enable branch stack sampling framework support with BHRB arch/powerpc/include/asm/perf_event_server.h | 6 ++ arch/powerpc/include/asm/ppc-opcode.h | 7 ++ arch/powerpc/perf/Makefile | 2 +- arch/powerpc/perf/bhrb.S | 44 +++++++++++++ arch/powerpc/perf/core-book3s.c | 96 +++++++++++++++++++++++++++- arch/powerpc/perf/perf_event_bhrb.c | 85 ++++++++++++++++++++++++ arch/powerpc/perf/power8-pmu.c | 57 ++++++++++++++++- 7 files changed, 292 insertions(+), 5 deletions(-) create mode 100644 arch/powerpc/perf/bhrb.S create mode 100644 arch/powerpc/perf/perf_event_bhrb.c -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/