Messages in this thread | | | Date | Thu, 5 Mar 2020 14:48:52 -0800 | From | Andi Kleen <> | Subject | Re: [PATCH v1 00/11] PEBS virtualization enabling via DS |
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> Testing: > The guest can use PEBS feature like native. e.g.
Could you please add example qemu command lines too? That will make it much easier for someone to reproduce.
-Andi > > # perf record -e instructions:ppp ./br_instr a > > perf report on guest: > # Samples: 2K of event 'instructions:ppp', # Event count (approx.): 1473377250 > # Overhead Command Shared Object Symbol > 57.74% br_instr br_instr [.] lfsr_cond > 41.40% br_instr br_instr [.] cmp_end > 0.21% br_instr [kernel.kallsyms] [k] __lock_acquire > > perf report on host: > # Samples: 2K of event 'instructions:ppp', # Event count (approx.): 1462721386 > # Overhead Command Shared Object Symbol > 57.90% br_instr br_instr [.] lfsr_cond > 41.95% br_instr br_instr [.] cmp_end > 0.05% br_instr [kernel.vmlinux] [k] lock_acquire
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