From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id CAABA7D043 for ; Mon, 2 Jul 2018 14:45:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751931AbeGBOpq (ORCPT ); Mon, 2 Jul 2018 10:45:46 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:51560 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751443AbeGBOpp (ORCPT ); Mon, 2 Jul 2018 10:45:45 -0400 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w62Ej9fK012806 for ; Mon, 2 Jul 2018 10:45:45 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 2jym8fn1yh-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 02 Jul 2018 10:45:44 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 2 Jul 2018 15:45:38 +0100 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w62EjbXE38928636 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 2 Jul 2018 14:45:37 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E1E8642049; Mon, 2 Jul 2018 15:45:20 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EE20742054; Mon, 2 Jul 2018 15:45:17 +0100 (BST) Received: from linux.vnet.ibm.com (unknown [9.40.192.68]) by d06av24.portsmouth.uk.ibm.com (Postfix) with SMTP; Mon, 2 Jul 2018 15:45:17 +0100 (BST) Date: Mon, 2 Jul 2018 07:45:33 -0700 From: Srikar Dronamraju To: Ravi Bangoria Cc: oleg@redhat.com, rostedt@goodmis.org, mhiramat@kernel.org, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, linux-kernel@vger.kernel.org, corbet@lwn.net, linux-doc@vger.kernel.org, ananth@linux.vnet.ibm.com, alexis.berlemont@gmail.com, naveen.n.rao@linux.vnet.ibm.com, linux-arm-kernel@lists.infradead.org, linux-mips@linux-mips.org, linux@armlinux.org.uk, ralf@linux-mips.org, paul.burton@mips.com Subject: Re: [PATCH v5 10/10] perf probe: Support SDT markers having reference counter (semaphore) Reply-To: Srikar Dronamraju References: <20180628052209.13056-1-ravi.bangoria@linux.ibm.com> <20180628052209.13056-11-ravi.bangoria@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20180628052209.13056-11-ravi.bangoria@linux.ibm.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-TM-AS-GCONF: 00 x-cbid: 18070214-0008-0000-0000-0000024ECE6F X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18070214-0009-0000-0000-000021B4D87A Message-Id: <20180702144533.GA65296@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-07-02_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807020170 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org * Ravi Bangoria [2018-06-28 10:52:09]: > With this, perf buildid-cache will save SDT markers with reference > counter in probe cache. Perf probe will be able to probe markers > having reference counter. Ex, > > # readelf -n /tmp/tick | grep -A1 loop2 > Name: loop2 > ... Semaphore: 0x0000000010020036 > > # ./perf buildid-cache --add /tmp/tick > # ./perf probe sdt_tick:loop2 > # ./perf stat -e sdt_tick:loop2 /tmp/tick > hi: 0 > hi: 1 > hi: 2 > ^C > Performance counter stats for '/tmp/tick': > 3 sdt_tick:loop2 > 2.561851452 seconds time elapsed > > Signed-off-by: Ravi Bangoria > Acked-by: Masami Hiramatsu > Looks good to me. Acked-by: Srikar Dronamraju -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html