Hi Stephane,
On Mon, 18 Aug 2014 01:18:15 +0200, Stephane Eranian wrote:
> Enable capture of interrupted machine state for 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 regs to dump for each sample
> + * state captured on:
> + * - precise = 0: PMU interrupt
> + * - precise > 0: sampled instruction
> + *
> + * See asm/perf_regs.h for details.
> + */
> + __u64 sample_regs_intr;
> };
Hmm.. this increases the size of perf_event_attr. It seems you need to
also define PERF_ATTR_SIZE_VER4 and update attr_file_abi_sizes.
Thanks,
Namhyung
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