The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/afa11eeaf4708dc1672cbd7f22644baed28c16c9

commit afa11eeaf4708dc1672cbd7f22644baed28c16c9
Author: Chong Jiang <chongjiang@chromium.org>
Date: Thu May 25 00:24:43 2017

PerfProvider: Collect cache-misses on x86-64

BUG=726108

Change-Id: I9eab31007e6a00fd8c960481bac1e829556d4e90
Reviewed-on: https://chromium-review.googlesource.com/514328
Reviewed-by: Simon Que <sque@chromium.org>
Commit-Queue: Chong Jiang <chongjiang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#474491}
[modify] https://crrev.com/afa11eeaf4708dc1672cbd7f22644baed28c16c9/chrome/browser/metrics/perf/perf_provider_chromeos.cc
[modify] https://crrev.com/afa11eeaf4708dc1672cbd7f22644baed28c16c9/chrome/browser/metrics/perf/perf_provider_chromeos_unittest.cc

Preliminary data on the beta channel shows we are collecting 80% more samples at the median, compared to cycles.flat.

fact : [min, 25%ile, 50%ile, 75%ile, max]

cache-misses.flat : [4,1153,2538,4584,20621]
cycles.flat : [1,463,1407,2985,19642]

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/08bcbb633761108ef55fd8feb2daeae476d16845

commit 08bcbb633761108ef55fd8feb2daeae476d16845
Author: Chong Jiang <chongjiang@chromium.org>
Date: Mon Jul 17 21:56:13 2017

PerfProvider: Reduce sampling frequency for cache-misses

BUG=726108
R=gmx@chromium.org, sque@chromium.org

Change-Id: I7a87f4dedd0f722ae90ee71e9c60ce57f9a91a65
Reviewed-on: https://chromium-review.googlesource.com/563490
Commit-Queue: Chong Jiang <chongjiang@chromium.org>
Reviewed-by: Simon Que <sque@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487258}
[modify] https://crrev.com/08bcbb633761108ef55fd8feb2daeae476d16845/chrome/browser/metrics/perf/perf_provider_chromeos.cc
[modify] https://crrev.com/08bcbb633761108ef55fd8feb2daeae476d16845/chrome/browser/metrics/perf/perf_provider_chromeos_unittest.cc