Re: [tip:perfcounters/core] perf record/report: Add call graph / call chain profiling
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- Subject: Re: [tip:perfcounters/core] perf record/report: Add call graph / call chain profiling
- From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
- Date: Wed, 17 Jun 2009 09:29:04 +0200
- Cc: mingo@xxxxxxxxxx, hpa@xxxxxxxxx, paulus@xxxxxxxxx, acme@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, penberg@xxxxxxxxxxxxxx, efault@xxxxxx, arjan@xxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxx, linux-tip-commits@xxxxxxxxxxxxxxx
- In-reply-to: <20090616025750.GB6057@nowhere>
- References: <tip-3efa1cc99ec51bc7a7ae0011a16619fd20dbe6ea@xxxxxxxxxxxxxx> <20090616025750.GB6057@nowhere>
On Tue, 2009-06-16 at 04:57 +0200, Frederic Weisbecker wrote:
> > +struct ip_chain_event {
> > + __u16 nr;
>
>
>
> Is it needed to have the nr encoded in the ip_chain?
> We can already find it by doing kernel + user.
strictly speaking: hv+kernel+user
but yeah, we could possibly replace it with another context, guest
perhaps.
suggestions anyone?
>
> > + __u16 hv;
> > + __u16 kernel;
> > + __u16 user;
> > + __u64 ips[];
> > +};
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