Messages in this thread | | | Date | Fri, 4 Mar 2011 16:28:34 +0800 | From | Han Pingtian <> | Subject | how to use 'perf kvm'? |
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Hello,
Can someone tell me how to use the subcommand 'kvm' of the perf tool? I'm trying to use it this way:
perf kvm --guest --guestkallsyms kallsyms top
where kallsyms is copied from the kvm guest. But nothing useful is displayed, only some headers:
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PerfTop: 0 irqs/sec kernel:-nan% us:-nan% guest kernel:-nan% guest us:-nan% exact: -nan% [1000Hz cycles], (all, 2 CPUs) -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
samples pcnt DSO _______ _____
exiting.
Thanks in advance.
-- Han Pingtian Quality Engineer hpt @ #kernel-qe Red Hat, Inc Freedom ... courage ... Commitment ... ACCOUNTABILITY
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