Re: [PATCH] perf stat: add branch performance counters to default

From: Ingo Molnar
Date: Mon Oct 19 2009 - 07:23:19 EST



* Tim Blechmann <tim@xxxxxxxxxx> wrote:

> not sure, whether there is any reason, why the branch performance
> counters are not enabled by default. personally, i would find it quite
> useful, though

yeah, i find it useful too. The main reason is that most of the systems
out there have like 2 freely defined events. Only Nehalem and i think
Power7 has more.

OTOH ... maybe we should just do it, as most measurement and tuning is
done on modern hardware. I'll try your patch in the perf tree - if too
many people complain we will undo it.

Ingo
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