2017-02-06 22:38 GMT+03:00 Matwey V. Kornilov <matwey.korni...@gmail.com>: > 2017-02-06 21:05 GMT+03:00 Dr. David Alan Gilbert <dgilb...@redhat.com>: >>>> So you didn't mention this was running inside VMWare; it looks to me as if >>>> that's rejecting the PMU MSR accesses. >>>> For reference which version of VMWare are you using? >> >>>ESXi 6.0.0 Build 2494585 >> >>>I also find that enabling perf counters in VMWare configuration also >> helps. >> >> OK, so that suggests the problem is that with PMU disabled in VMWare >> config, it's not giving the right info to the guest to know it's >> disabled. > > How should it provide info? Can we check it? >
Hi, I've found the following doc: https://software.intel.com/sites/default/files/m/5/2/c/f/1/30320 -Nehalem-PMU-Programming-Guide-Core.pdf I am not sure how up-to-date it is. Does qemu follow recommendations from secton 4.3? I use msr-tools package and rdmsr tool to check some registers from table 26... IA32_MISC_ENABLE = 0 IA32_PERF_CAPABILITIES = 0 in my case. >> >>>But why did it just work before 48e1a45c3166 with perf counters >> disabled? >> >> Before that bug it ignored the failure to write/read the PMU MSRs - but >> also lost all the MSRs after the PMU access and we'd found that if we >> ever had that happen we'd get lots of weird bugs related to the other >> MSRs. >> >>>> >>>> My colleague suggested that '-cpu host,pmu=off' might work instead of >>>> having to hack around with the source. >> >>> Indeed, this also helps. >> >> -- >> You received this bug notification because you are subscribed to the bug >> report. >> https://bugs.launchpad.net/bugs/1661386 >> >> Title: >> Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed >> >> Status in QEMU: >> New >> >> Bug description: >> Hello, >> >> >> I see the following when try to run qemu from master as the following: >> >> # ./x86_64-softmmu/qemu-system-x86_64 --version >> QEMU emulator version 2.8.50 (v2.8.0-1006-g4e9f524) >> Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers >> # ./x86_64-softmmu/qemu-system-x86_64 -machine accel=kvm -nodefaults >> -no-reboot -nographic -cpu host -vga none -kernel .build.kernel.kvm >> -initrd .build.initrd.kvm -append 'panic=1 no-kvmclock console=ttyS0 >> loglevel=7' -m 1024 -serial stdio >> qemu-system-x86_64: /home/matwey/lab/qemu/target/i386/kvm.c:1849: >> kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed. >> >> First broken commit has been bisected: >> >> commit 48e1a45c3166d659f781171a47dabf4a187ed7a5 >> Author: Paolo Bonzini <pbonz...@redhat.com> >> Date: Wed Mar 30 22:55:29 2016 +0200 >> >> target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs >> >> This would have caught the bug in the previous patch. >> >> Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> >> >> My cpuinfo is the following: >> >> processor : 0 >> vendor_id : GenuineIntel >> cpu family : 6 >> model : 44 >> model name : Intel(R) Xeon(R) CPU X5675 @ 3.07GHz >> stepping : 2 >> microcode : 0x14 >> cpu MHz : 3066.775 >> cache size : 12288 KB >> physical id : 0 >> siblings : 2 >> core id : 0 >> cpu cores : 2 >> apicid : 0 >> initial apicid : 0 >> fpu : yes >> fpu_exception : yes >> cpuid level : 11 >> wp : yes >> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca >> cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm >> constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc >> aperfmperf pni pclmulqdq vmx ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor >> lahf_lm ida arat epb dtherm tpr_shadow vnmi ept vpid >> bugs : >> bogomips : 6133.55 >> clflush size : 64 >> cache_alignment : 64 >> address sizes : 40 bits physical, 48 bits virtual >> power management: >> >> To manage notifications about this bug go to: >> https://bugs.launchpad.net/qemu/+bug/1661386/+subscriptions > > > > -- > With best regards, > Matwey V. Kornilov > http://blog.matwey.name > xmpp://0x2...@jabber.ru -- With best regards, Matwey V. Kornilov http://blog.matwey.name xmpp://0x2...@jabber.ru -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1661386 Title: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed Status in QEMU: New Bug description: Hello, I see the following when try to run qemu from master as the following: # ./x86_64-softmmu/qemu-system-x86_64 --version QEMU emulator version 2.8.50 (v2.8.0-1006-g4e9f524) Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers # ./x86_64-softmmu/qemu-system-x86_64 -machine accel=kvm -nodefaults -no-reboot -nographic -cpu host -vga none -kernel .build.kernel.kvm -initrd .build.initrd.kvm -append 'panic=1 no-kvmclock console=ttyS0 loglevel=7' -m 1024 -serial stdio qemu-system-x86_64: /home/matwey/lab/qemu/target/i386/kvm.c:1849: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed. First broken commit has been bisected: commit 48e1a45c3166d659f781171a47dabf4a187ed7a5 Author: Paolo Bonzini <pbonz...@redhat.com> Date: Wed Mar 30 22:55:29 2016 +0200 target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs This would have caught the bug in the previous patch. Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> My cpuinfo is the following: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 44 model name : Intel(R) Xeon(R) CPU X5675 @ 3.07GHz stepping : 2 microcode : 0x14 cpu MHz : 3066.775 cache size : 12288 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq vmx ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm ida arat epb dtherm tpr_shadow vnmi ept vpid bugs : bogomips : 6133.55 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1661386/+subscriptions
