[PATCH v7 0/5] powerpc/hv-24x7: Expose chip/sockets info to add json file metric support for the hv_24x7 socket/chip level events

Kajol Jain
2020-03-27T06:37:12Z

Patchset fixes the inconsistent results we are getting when
we run multiple 24x7 events.

"hv_24x7" pmu interface events needs system dependent parameter
like socket/chip/core. For example, hv_24x7 chip level events needs
specific chip-id to which the data is requested should be added as part
of pmu events.

So to enable JSON file support to "hv_24x7" interface, patchset expose
total number of sockets and chips per-socket details in sysfs
files (sockets, chips) under "/sys/devices/hv_24x7/interface/".

To get sockets and number of chips per sockets, patchset adds a rtas call
with token "PROCESSOR_MODULE_INFO" to get these details. Patchset also
handles partition migration case to re-init these system depended
parameters by adding proper calls in post_mobility_fixup() (mobility.c).

v6: http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=164769
Changelog:
v6 -> v7
- Split patchset into two patch series, one with kernel changes
and another with perf tool side changes. This pachset contain
all kernel side changes.

Kajol Jain (5):
powerpc/perf/hv-24x7: Fix inconsistent output values incase multiple
hv-24x7 events run
powerpc/hv-24x7: Add rtas call in hv-24x7 driver to get processor
details
powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show
processor details
Documentation/ABI: Add ABI documentation for chips and sockets
powerpc/hv-24x7: Update post_mobility_fixup() to handle migration

.../sysfs-bus-event_source-devices-hv_24x7 | 14 +++
arch/powerpc/perf/hv-24x7.c | 104 ++++++++++++++++--
arch/powerpc/platforms/pseries/mobility.c | 12 ++
arch/powerpc/platforms/pseries/pseries.h | 3 +
4 files changed, 123 insertions(+), 10 deletions(-)

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2.18.1