[perfcompare] Do multiple launches of each test process instead of just one

We've found that the mean running times of performance tests tend to
vary between launches of the same process and between reboots.

We want to calculate the mean across process launches and reboots, so
we need to sample accordingly.  This change implements sampling across
process relaunches.  Sampling across reboots will be done later.

 * Before: We launch the perftest process once, and (for each test
   case) do 1000 test runs in that process.  We treat this as a sample
   of size 1000 when calculating confidence intervals.

 * After: We launch the perftest process 30 times, and (for each test
   case) do 100 test runs in each process.  We treat this as a sample
   of size 30 when calculating confidence intervals.

Bug: IN-646
Test: "python perfcompare_test.py" + perfcompare trybot
Change-Id: Ic0176dcc394e87015302bbe3d8588a68408fca05
3 files changed
tree: bde47d4982ee235256b2f54b3fb6a9ac27619015
  1. boards/
  2. build/
  3. buildtools/
  4. bundles/
  5. docs/
  6. examples/
  7. garnet/
  8. peridot/
  9. products/
  10. scripts/
  11. sdk/
  12. src/
  13. third_party/
  14. tools/
  15. zircon/
  16. .clang-format
  17. .dir-locals.el
  18. .gitattributes
  19. .gitignore
  20. .gn
  21. AUTHORS
  22. BUILD.gn
  23. CODE_OF_CONDUCT.md
  24. CONTRIBUTING.md
  25. LICENSE
  26. OWNERS
  27. PATENTS
  28. README.md
  29. rustfmt.toml
README.md

Fuchsia

Pink + Purple == Fuchsia (a new operating system)

What is Fuchsia?

Fuchsia is a modular, capability-based operating system. Fuchsia runs on modern 64-bit Intel and ARM processors.

Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See the documentation.