On Mon, 15 Sep 2025 15:59:40 +0530, Athira Rajeev wrote:
> The pseries Shared Processor Logical Partition(SPLPAR) machines can
> retrieve a log of dispatch and preempt events from the hypervisor
> using data from Disptach Trace Log(DTL) buffer. With this information,
> user can retrieve when and why each dispatch & preempt has occurred.
> The vpa-dtl PMU exposes the Virtual Processor Area(VPA) DTL counters
> via perf.
>
> [...]
Applied to powerpc/next.
[1/7] powerpc/time: Expose boot_tb via accessor
https://git.kernel.org/powerpc/c/2dc019ca39347f76891d34a992b67258078aa45d
[2/7] powerpc/vpa_dtl: Add interface to expose vpa dtl counters via perf
https://git.kernel.org/powerpc/c/4708fba19adee9ba14ef28af6face4ab043d9cd6
[3/7] docs: ABI: sysfs-bus-event_source-devices-vpa-dtl: Document sysfs event
format entries for vpa_dtl pmu
https://git.kernel.org/powerpc/c/6f2c65680c336a274b69b1fdcbfa2eeb8159bee8
[4/7] powerpc/perf/vpa-dtl: Add support to setup and free aux buffer for
capturing DTL data
https://git.kernel.org/powerpc/c/5d75aed84d3b6d25c7c4bb4a212b14fae4d1020b
[5/7] powerpc/perf/vpa-dtl: Add support to capture DTL data in aux buffer
https://git.kernel.org/powerpc/c/2de8b6dd5ae72eb6fb7c756a3f2c131171fe3b8b
[6/7] powerpc/perf/vpa-dtl: Handle the writing of perf record when aux wake up
is needed
https://git.kernel.org/powerpc/c/b5e71cafa02d4e673639a3bd4c03d84db5dd8b8a
[7/7] powerpc/perf/vpa-dtl: Add documentation for VPA dispatch trace log PMU
https://git.kernel.org/powerpc/c/4a774b39e68fac7d6c7c9cffeb6a4ea4b6dc8b41
Thanks
