From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp03.in.ibm.com (e28smtp03.in.ibm.com [122.248.162.3]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e28smtp03.in.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 829D72C0098 for ; Wed, 22 May 2013 15:48:20 +1000 (EST) Received: from /spool/local by e28smtp03.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 22 May 2013 11:13:14 +0530 Received: from d28relay05.in.ibm.com (d28relay05.in.ibm.com [9.184.220.62]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id 4F8371258052 for ; Wed, 22 May 2013 11:20:11 +0530 (IST) Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r4M5m8kd9109992 for ; Wed, 22 May 2013 11:18:08 +0530 Received: from d28av05.in.ibm.com (loopback [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r4M5mD86017733 for ; Wed, 22 May 2013 15:48:13 +1000 From: Anshuman Khandual To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] Improvement and fixes for BHRB Date: Wed, 22 May 2013 11:17:45 +0530 Message-Id: <1369201667-9048-1-git-send-email-khandual@linux.vnet.ibm.com> Cc: mikey@neuling.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , (1) The first patch fixes a situation like this Before patch:- ------------ ./perf record -j any -e branch-misses:k ls Error: The sys_perf_event_open() syscall returned with 95 (Operation not supported) for event (branch-misses:k). /bin/dmesg may provide additional information. No CONFIG_PERF_EVENTS=y kernel support configured? Here 'perf record' actually copies over ':k' filter request into BHRB privilege state filter config and our previous check in kernel would fail that. After patch:- ------------- /perf record -j any -e branch-misses:k ls perf perf.data perf.data.old test-mmap-ring [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.002 MB perf.data (~102 samples) ] (2) The second patch fixes context migration for BHRB filter configuration Anshuman Khandual (2): powerpc, perf: Ignore separate BHRB privilege state filter request powerpc, perf: BHRB filter configuration should follow the task arch/powerpc/perf/core-book3s.c | 5 ++++- arch/powerpc/perf/power8-pmu.c | 17 +++++++++-------- 2 files changed, 13 insertions(+), 9 deletions(-) -- 1.7.11.7