willis: Reduce the number of parallelism.
Seems like running too many processes at one time leaves kernel to
thrash and not very efficient. My benchmark on cloudtop on chrome os
code base on hot caches was:
almost unlimited (original code)
real 0m2.536s
user 0m8.089s
sys 0m34.078s
2* numcpus == 192
real 0m2.428s
user 0m8.692s
sys 0m32.967s
1* numcpus == 96
real 0m2.358s
user 0m8.858s
sys 0m42.823s
BUG=None
TEST=Run willis
Change-Id: Ic8d1d5c288bf5c3e55d6a54817a9e739e9db04ea
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2340446
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Commit-Queue: Junichi Uekawa <uekawa@chromium.org>
Tested-by: Junichi Uekawa <uekawa@chromium.org>
1 file changed
