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SubjectRe: [PATCH 1/4] perf: add ability to sample machine state on interrupt
On Wed, Jul 09, 2014 at 12:15:56AM +0200, Stephane Eranian wrote:
> Enable capture of interrupted machine state in each
> sample.
>
> Registers to sample are passed per event in the
> sample_regs_intr bitmask.
>
> To sample interrupt machine state, the
> PERF_SAMPLE_INTR_REGS must be passed in
> sample_type.
>
> The list of available registers is arch
> dependent and provided by asm/perf_regs.h
>
> Registers are laid out as u64 in the order
> of the bit order of sample_intr_regs.

SNIP

> };
>
> /*
> @@ -334,6 +335,15 @@ struct perf_event_attr {
>
> /* Align to u64. */
> __u32 __reserved_2;
> + /*
> + * Defines set of user regs to dump on samples.
^^ interrupt

jirka


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