linux-kernel - [PATCH 0/9] powerpc/hv-24x7: Reorganize single_24x7

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Date:	Tue, 17 Feb 2015 14:00:25 -0800
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Michael Ellerman <mpe@...erman.id.au>,
	Paul Mackerras <paulus@...ba.org>
Cc:	peterz@...radead.org, <linux-kernel@...r.kernel.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 0/9] powerpc/hv-24x7: Reorganize single_24x7_request()

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

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