From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Ortiz Subject: "precise" not supported when executing perf mem Date: Wed, 22 Apr 2015 15:33:18 +0000 (UTC) Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org ([80.91.229.3]:44548 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932241AbbDWHzH (ORCPT ); Thu, 23 Apr 2015 03:55:07 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1YlByS-0001GN-3z for linux-perf-users@vger.kernel.org; Thu, 23 Apr 2015 09:55:04 +0200 Received: from host198-2.natpool.mwn.de ([138.246.2.198]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 23 Apr 2015 09:55:04 +0200 Received: from daniel.ortiz by host198-2.natpool.mwn.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 23 Apr 2015 09:55:04 +0200 Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-perf-users@vger.kernel.org Hello When I try to run perf mem I obtain the following error: do@nux:~/perf$ sudo perf mem record ls Error: 'precise' request may not be supported. Try removing 'p' modifier. This happens despite cpuinfo reporting that the processor supports PEBS. What could I be missing here that does not allow perf mem to work? I am running a 64 bit system on Xubuntu with 4GB Ram, I am building perf myself, but the error also appears with the precompiled version. Regards Daniel My kernel: Linux nux 3.16.0-34-generic #47-Ubuntu SMP perf: perf version 3.16.7-ckt8 Some cpuinfo output: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Core(TM) i3-2367M CPU @ 1.40GHz stepping : 7 microcode : 0x23 cpu MHz : 848.039 cache size : 3072 KB physical id : 0 siblings : 4 core id : 1 cpu cores : 2 apicid : 3 initial apicid : 3 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx lahf_lm arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid