tree acb32cdab517b4d2d78836ce2d1dba0073c6d436
parent 1cc48481a2ca530bab04999da78eddc8a1b98adb
author Ting-Yuan Huang <laszio@google.com> 1487362802 -0800
committer chrome-bot <chrome-bot@chromium.org> 1487722601 -0800

crosperf: set recommended iterations for benchmarks

This CL associates estimated standard deviations to each benchmark,
according to experiments. The recommended iterations can be specified by
setting iterations = 0 in the experiment files. Setting it to numbers
greater than 0 will override the default iterations and behaves exactly
the same as before.

With this change, benchmarks in all_toolchain_perf get no more than 2%
margin of error within 90% of time. See crbug.com/673558 for how the
standard deviations are estimated.

BUG=chromium:673558
TEST=all_toolchain_perf + page_cycler_v2.typical_25 finishes in 3.5
     hours for an image on chell.

Change-Id: Ie2ed07878c1237ad31a8568ae3fd3fb96cd11f3b
Reviewed-on: https://chromium-review.googlesource.com/424915
Commit-Ready: Ting-Yuan Huang <laszio@chromium.org>
Tested-by: Ting-Yuan Huang <laszio@chromium.org>
Reviewed-by: Caroline Tice <cmtice@chromium.org>