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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 17 Oct 2018 10:28:03 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w9H9S3hT51904518 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Wed, 17 Oct 2018 09:28:03 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E702242042 for ; Wed, 17 Oct 2018 09:28:02 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 93A2A42049 for ; Wed, 17 Oct 2018 09:28:02 +0000 (GMT) Received: from [9.126.27.16] (unknown [9.126.27.16]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP for ; Wed, 17 Oct 2018 09:28:02 +0000 (GMT) Subject: Re: help To: linuxppc-dev@lists.ozlabs.org References: From: Madhavan Srinivasan Date: Wed, 17 Oct 2018 14:58:01 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 18101709-0028-0000-0000-000003089B03 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18101709-0029-0000-0000-000023C3AC7F Message-Id: <87f33eae-dc91-4421-9a99-feaa05bc1708@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-10-16_14:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810170084 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: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Wednesday 17 October 2018 02:03 PM, Lorenzo Chelini wrote: > Hi All, > > I am a PhD at IBM Zurich. I am playing around with the new POWER9 servers. > I am interested in plotting a roofline model for a given application, but I > need > to measure the traffic to and from the memory. > Ideally, what I would like to measure is the traffic at the memory > controller level. Yes, you can get that data using Nest IMC counters. And perf has support to expose these counters. Here is a usage example $ perf stat -e nest_mcs01_imc/PM_MCS01_128B_RD_DISP_PORT01/ -I 1000 --per-socket Above command gets you all the Read traffic via specific memory controller/port. Option "-I" reads the counter every sec and "--per-socket" presents the data socket wise. "perf list nest_mcs" command will list all supportted events for memory controller. Maddy > > Do you know if this is possible using perf? If yes, which performance > counters I should > query to have an estimate on the memory traffic? > > Thanks for your time. > Looking forward to hearing from you. > Best regards, > Lorenzo Chelini >