On Sun, Sep 1, 2013 at 5:55 PM, Linus Torvalds <torva...@linux-foundation.org> wrote: > On Sun, Sep 1, 2013 at 8:45 AM, Sedat Dilek <sedat.di...@gmail.com> wrote: >> >> Samples: 160K of event 'cycles:pp', Event count (approx.): 77003901089 >> + 12,46% t_lockref_from- [kernel.kallsyms] [k] irq_return >> + 4,86% t_lockref_from- [kernel.kallsyms] [k] lockref_get_or_lock >> + 4,42% t_lockref_from- [kernel.kallsyms] [k] __ticket_spin_lock >> + 4,28% t_lockref_from- [kernel.kallsyms] [k] __acct_update_integrals > > You need to go into __ticket_spin_lock to see who the callers are. > > Just go down to it and press enter to expand it (and then you need to > go and expand that entry too to get the callers) >
I am new to perf usage. 4,60% t_lockref_from- [kernel.kallsyms] [k] __ticket_spin_lock Which entry to select? Annotate __ticket_spin_lock Zoom into t_lockref_from-(3962) thread Zoom into the Kernel DSO Browse map details Run scripts for samples of thread [t_lockref_from-] Run scripts for samples of symbol [__ticket_spin_lock] Run scripts for all samples Switch to another data file in PWD Exit > I still don't know how you get to irq_return. It should use sysret. Odd. - Sedat - -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
