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. Sukadev Bhattiprolu (9): powerpc/perf: hv-24x7: Modify definition of request and result buffers powerpc: perf/hv24x7: Remove unnecessary parameter powerpc: perf/hv-24x7: Drop event_24x7_request() powerpc: perf/hv24x7: Move debug prints to separate function perf: powerpc/hv-24x7: Rename hv_24x7_event_update powerpc: perf/hv-24x7: Define add_event_to_24x7_request() powerpc: perf/hv-24x7: Define update_event_count() powerpc: perf/hv-24x7: Break up single_24x7_request powerpc: perf/hv-24x7: Add missing put_cpu_var() arch/powerpc/perf/hv-24x7.c | 198 ++++++++++++++++++++++++++++---------------- arch/powerpc/perf/hv-24x7.h | 8 +- 2 files changed, 130 insertions(+), 76 deletions(-) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/