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Fri, 24 Jul 2020 11:02:11 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7031811C054; Fri, 24 Jul 2020 11:02:09 +0000 (GMT) Received: from [9.199.32.41] (unknown [9.199.32.41]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 24 Jul 2020 11:02:09 +0000 (GMT) Subject: Re: [v3 13/15] tools/perf: Add perf tools support for extended register capability in powerpc To: Athira Rajeev References: <1594996707-3727-1-git-send-email-atrajeev@linux.vnet.ibm.com> <1594996707-3727-14-git-send-email-atrajeev@linux.vnet.ibm.com> From: Ravi Bangoria Message-ID: <7fcf405f-440a-19dc-7c3a-33fc52c9d1ef@linux.ibm.com> Date: Fri, 24 Jul 2020 16:32:08 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <1594996707-3727-14-git-send-email-atrajeev@linux.vnet.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-24_03:2020-07-24, 2020-07-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxscore=0 impostorscore=0 mlxlogscore=811 spamscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 phishscore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007240080 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ego@linux.vnet.ibm.com, mikey@neuling.org, maddy@linux.vnet.ibm.com, kvm@vger.kernel.org, Ravi Bangoria , kvm-ppc@vger.kernel.org, svaidyan@in.ibm.com, acme@kernel.org, jolsa@kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hi Athira, On 7/17/20 8:08 PM, Athira Rajeev wrote: > From: Anju T Sudhakar > > Add extended regs to sample_reg_mask in the tool side to use > with `-I?` option. Perf tools side uses extended mask to display > the platform supported register names (with -I? option) to the user > and also send this mask to the kernel to capture the extended registers > in each sample. Hence decide the mask value based on the processor > version. > > Currently definitions for `mfspr`, `SPRN_PVR` are part of > `arch/powerpc/util/header.c`. Move this to a header file so that > these definitions can be re-used in other source files as well. It seems this patch has a regression. Without this patch: $ sudo ./perf record -I ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.458 MB perf.data (318 samples) ] With this patch: $ sudo ./perf record -I Error: dummy:HG: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat' Ravi