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SubjectRe: [patch] Re: [perf] Finding uninstalled modules Was Re: mailing list for trace users
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On Wed, 2009-09-23 at 13:32 +0200, Mike Galbraith wrote:
> On Wed, 2009-09-23 at 12:55 +0300, Avi Kivity wrote:
> > On 09/23/2009 12:20 PM, Mike Galbraith wrote:
> > >
> > > Yup, brown baggie variety. Oh darn.
> > >
> > > perf_counter tools: fix brown baggie module symbol loading bug.
> > >
> > > If there are no modules currently loaded, or the last module scanned is not
> > > loaded, dso__load_modules() steps on the value from dso__load_vmlinux(), so
> > > we happily load the kallsyms symbols on top of what we've already loaded.
> > >
> > > Fix that such that the total count of symbols loaded is returned. Should
> > > module symbol load fail after parsing of vmlinux, is's a hard failure, so
> > > do not silently fall-back to kallsyms.
> > >
> > >
> >
> > Still fails, but differently. Now 'annotate -k ... -m -v -v' doesn't
> > list vmx_vcpu_run at all, even though it's prominent in 'perf top'.
>
> Hm. I just did a record, then report with and without -k -m, and now
> get identical reports with your config (plus some more modules) here.

With your config, I can't even get my e1000 flood pinging friztbox to
show up in perf top without a 70 line monitor. Mondo overhead.

------------------------------------------------------------------------------
PerfTop: 3860 irqs/sec kernel:94.0% [10000Hz instructions], (all, cpu: 0)
------------------------------------------------------------------------------

samples pcnt kernel function
_______ _____ _______________

1702.00 - 5.5% : _spin_lock_irqsave
1659.00 - 5.3% : add_preempt_count
1516.00 - 4.9% : sub_preempt_count
1330.00 - 4.3% : _spin_unlock_irqrestore
1132.00 - 3.6% : debug_smp_processor_id
844.00 - 2.7% : find_busiest_group
639.00 - 2.1% : schedule
629.00 - 2.0% : get_parent_ip
586.00 - 1.9% : test_ti_thread_flag
.....

310.00 - 0.3% : sys_recvmsg
303.00 - 0.3% : e1000_clean_rx_irq [e1000e]
302.00 - 0.3% : raw_sendmsg
300.00 - 0.3% : e1000_xmit_frame [e1000e]





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