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[0/3] Calculate memory access latency stats

Message ID 20221115173258.2530923-1-coltonlewis@google.com (mailing list archive)
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Series Calculate memory access latency stats | expand

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Colton Lewis Nov. 15, 2022, 5:32 p.m. UTC 
Sample the latency of memory accesses in dirty_log_perf_test and
report summary stats to give a picture of the latency
distribution. Specifically, focus on the right tail with the 50th,
90th, and 99th percentile reported in ns.

This patch depends on my previous dirty_log_perf_test patch adding the
ability to randomize memory accesses. It needs the pRNG to do random
sampling.

https://lore.kernel.org/kvm/20221107182208.479157-1-coltonlewis@google.com/

Colton Lewis (3):
  KVM: selftests: Allocate additional space for latency samples
  KVM: selftests: Collect memory access latency samples
  KVM: selftests: Print summary stats of memory latency distribution

 .../selftests/kvm/dirty_log_perf_test.c       |   2 +
 .../selftests/kvm/include/perf_test_util.h    |   2 +
 .../selftests/kvm/lib/perf_test_util.c        | 103 +++++++++++++++++-
 3 files changed, 104 insertions(+), 3 deletions(-)

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2.38.1.431.g37b22c650d-goog