Messages in this thread | | | From | Sukadev Bhattiprolu <> | Subject | [PATCH v2 00/10] powerpc/hv-24x7: Reorganize single_24x7_request() | Date | Mon, 30 Mar 2015 18:53:37 -0700 |
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We currently issue a new hcall for to retrieve the value of each 24x7 counter that we want to read. However, the H_GET_24x7_DATA hcall can retrieve several counters in a single call, which would be useful in getting a more consistent snapshot of the system.
Reorganize the code that prepares a 24x7 hcall request, submits it and processes the result to allow reading seveal counters at once. We still submit a fresh hcall for each event for now. A follow-on patch-set will build on this to submit multiple perf_events in a single hcall.
Thanks to Peter Zijlstra for his input.
Changelog[v2] - Split independent changes in patch 2 into patch 3. - Minor changes to pr_err() (Patch 4). - Move whitespace changes to separate patch (Patch 8). - Minor function renames (Patch 10).
Sukadev Bhattiprolu (10): powerpc/hv-24x7: Modify definition of request and result buffers powerpc/hv24x7: Remove unnecessary parameter perf/hv24x7: Use pr_devel() to log message powerpc/hv-24x7: Drop event_24x7_request() powerpc/hv24x7: Move debug prints to separate function powerpc/hv-24x7: Rename hv_24x7_event_update powerpc/hv-24x7: Define add_event_to_24x7_request() perf/hv24x7: Whitespace cleanup powerpc/hv-24x7: Define update_event_count() powerpc/hv-24x7: Break up single_24x7_request
arch/powerpc/perf/hv-24x7.c | 212 +++++++++++++++++++++++++++----------------- arch/powerpc/perf/hv-24x7.h | 8 +- 2 files changed, 137 insertions(+), 83 deletions(-)
-- 1.8.3.1
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