dnebdal at gmail.com
Fri Nov 19 14:51:41 UTC 2010
On Fri, Nov 19, 2010 at 4:39 PM, Andriy Gapon <avg at freebsd.org> wrote:
> I am thinking about providing two APIs for this.
> 1. KPI
> void cpu_get_a_m_perf(u_int cpu, uint64_t *aperf, uint64_t *mperf);
> 2. Userland
> sysctl dev.cpu.N.aperf_mperf that returns two UQUAD values.
> But I am not sure where to put the code for both APIs.
> Adding another device under cpu seems like an overkill.
No comment on where to put it, but one other detail: Since these are
measures since last reset, you probably want a similar
"cpu_zero_a_m_perf" call. As for how that interacts with the sysctl,
uhm ... maybe also offering a time-since-last-reset could be useful?
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