From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp05.au.ibm.com (e23smtp05.au.ibm.com [202.81.31.147]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp05.au.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 745B92C02C7 for ; Mon, 10 Jun 2013 15:25:51 +1000 (EST) Received: from /spool/local by e23smtp05.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 10 Jun 2013 15:19:55 +1000 Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [9.190.234.120]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id EFA602BB0053 for ; Mon, 10 Jun 2013 15:25:41 +1000 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r5A5BAe264291008 for ; Mon, 10 Jun 2013 15:11:10 +1000 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r5A5PeCQ031329 for ; Mon, 10 Jun 2013 15:25:41 +1000 From: Anshuman Khandual To: linuxppc-dev@ozlabs.org Subject: [PATCH V3 0/2] Improvement and fixes for BHRB Date: Mon, 10 Jun 2013 10:55:08 +0530 Message-Id: <1370841910-28695-1-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 Changes in V2 ------------- (1) Updated the comment section of the code (2) Removed the informational print (3) Updated the commit section of the first patch Changes in V3 ------------- (1) Fixed the compilation warning problem after removing the unused variable 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 | 13 ++++--------- 2 files changed, 8 insertions(+), 10 deletions(-) -- 1.7.11.7