* Re: [tip:perf/core] perf/x86/intel: Add {rd,wr}lbr_{to,from} wrappers
[not found] <tip-d4cf1949f9689314aef962eea95df84a8288d097@git.kernel.org>
@ 2016-06-29 19:32 ` Peter Zijlstra
0 siblings, 0 replies; only message in thread
From: Peter Zijlstra @ 2016-06-29 19:32 UTC (permalink / raw)
To: linux-kernel, tglx, acme, mingo, jolsa, vincent.weaver, eranian,
alexander.shishkin, hpa, kan.liang, torvalds, davidcc
Cc: linux-tip-commits
On Mon, Jun 27, 2016 at 05:56:02AM -0700, tip-bot for Peter Zijlstra wrote:
> +static inline u64 rdlbr_from(unsigned int idx)
> +{
> + u64 val;
> +
> + rdmsrl(x86_pmu.lbr_from + idx, val);
> +
> + return lbr_from_signext_quirk_rd(val);
> +}
> +
> +static inline u64 rdlbr_to(unsigned int idx)
> +{
> + u64 val;
> +
> + rdmsrl(x86_pmu.lbr_from + idx, val);
Things work loads better when we use:
rdmsrl(x86_pmu.lbr_to + idx, val);
:-/
> +
> return val;
> }
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