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chromium / chromiumos / third_party / toolchain-utils / refs/heads/factory-trogdor-13443.B
commit2e734a52b5556f47cfd8ee560763dbd351a08680[log] [tgz]
authorDenis Nikitin <denik@google.com>Wed Aug 26 18:00:10 2020
committerCommit Bot <commit-bot@chromium.org>Thu Aug 27 02:51:18 2020
treec7ef1dfc742c6a66706500257060562aae72bd1f
parent5d21b27e2ed16db964d947a0a09fa156522a632d [diff]
crosperf: replace statistics stdev with pstdev

Behavior and results of statistics.stdev(data) are slightly different from
numpy.std(data) with default "ddof".
The main difference is the divisor which is "N - 1" in stdev vs. "N" in
numpy.std. As a consequence stdev fails with "N=1".

The change replaces stdev with pstdev (population standard deviation)
which is equivalent to numpy.std with default arguments that we were
using.
Added unittest with StdResult testing.

BUG=None
TEST=unittest and crosperf with one iteration passes.

Change-Id: I70c7105e6cabc27437504de16ea27afdd719e552
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2376880
Reviewed-by: George Burgess <gbiv@chromium.org>
Tested-by: Denis Nikitin <denik@chromium.org>
Commit-Queue: Denis Nikitin <denik@chromium.org>
2 files changed
tree: c7ef1dfc742c6a66706500257060562aae72bd1f
  1. afdo_metadata/
  2. afdo_redaction/
  3. afdo_tools/
  4. android_bench_suite/
  5. bestflags/
  6. binary_search_tool/
  7. compiler_wrapper/
  8. cros_utils/
  9. crosperf/
  10. cwp/
  11. debug_info_test/
  12. go/
  13. heatmaps/
  14. llvm_extra/
  15. llvm_tools/
  16. orderfile/
  17. pgo_tools/
  18. rust_tools/
  19. toolchain_utils_githooks/
  20. .gitignore
  21. .style.yapf
  22. android_merge_from_upstream.sh
  23. auto_delete_nightly_test_data.py
  24. build_chromeos.py
  25. build_tc.py
  26. buildbot_test_llvm.py
  27. buildbot_test_toolchains.py
  28. chromiumos_image_diff.py
  29. compiler-test.sh
  30. file_lock_machine.py
  31. file_lock_machine_test.py
  32. image_chromeos.py
  33. LICENSE
  34. lock_machine.py
  35. OWNERS
  36. OWNERS.toolchain
  37. PRESUBMIT.cfg
  38. pyrun
  39. README.chromium
  40. README.md
  41. remote_test.py
  42. run_tests_for.py
  43. setup_chromeos.py
  44. tc_enter_chroot.py
  45. update_telemetry_defaults.py
README.md

toolchain-utils

Various utilities used by the Chrome OS toolchain team.

Note

To run Python scripts in this directory, first run:

export PYTHONPATH=$(readlink -f .):$PYTHONPATH

from this directory.

Then you can run any script.

To get help on any script, type in python <script> --help, or refer to the header of the script for more information.