Hi John, Perfmon2 cannot work as is on top of KVM, unless they have added some PMU virtualization support.
On Fri, Apr 10, 2009 at 1:25 AM, john spurling <sy...@viscous.org> wrote: > Hello, > > Should Perfmon2 be expected to work under Linux's KVM? I'm running the > latest Perfmon2 patch applied to the Ubuntu Jaunty (9.04) 2.6.28 kernel > source base. Running the "task" command from the libpfm example code, I > get the following result from running against "bare metal:" > > jspurl...@tonto:~/download/perfmon/libpfm-3.7/examples$ ./task ls > sycall base 295 > major version 2 > minor version 82 > [FIXED_CTRL(pmc16)=0xaa pmi0=1 en0=0x2 pmi1=1 en1=0x2 pmi2=1 en2=0x0] > INSTRUCTIONS_RETIRED UNHALTED_CORE_CYCLES > [FIXED_CTR0(pmd16)] > [FIXED_CTR1(pmd17)] > PMD17 2500652 UNHALTED_CORE_CYCLES > PMD16 3140613 INSTRUCTIONS_RETIRED > > However, I get the following running under KVM: > sycall base > 295 > > major version > 2 > > minor version > 82 > > AMD family=6 model=0x2 stepping=0x3 rev=B > (K7) > [PERFSEL0(pmc0)=0x510076 emask=0x76 umask=0x0 os=0 usr=1 inv=0 en=1 > int=1 edge=0 > cnt_mask=0] > CPU_CLK_UNHALTED > > [PERFCTR0(pmd0)] > > [PERFSEL1(pmc1)=0x5100c0 emask=0xc0 umask=0x0 os=0 usr=1 inv=0 en=1 > int=1 edge=0 cnt_mask=0] > RETIRED_INSTRUCTIONS > > [PERFCTR1(pmd1)] > > PMD0 271854249967616 > CPU_CLK_UNHALTED > > PMD1 272507084996608 > RETIRED_INSTRUCTIONS > > > The number of cycles and instructions seems a bit exorbitant. In the > case of the KVM run, I'm running on a physically different machine whose > kernel does not have the Perfmon2 patch. > > I'm relatively new to both Perfmon and KVM, so it's quite possible that > I'm missing something very obvious here. > > Thanks, > john > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > http://p.sf.net/sfu/www-ibm-com > _______________________________________________ > perfmon2-devel mailing list > perfmon2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/perfmon2-devel > ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
