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 still don't know how you get to irq_return. It should use sysret. Odd.
Linus
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