tree 03dc117a9f30a3f518ac91d9f4d2cb28042ea808
parent d26b2796186412f8060ca3a7ce13b6b9b616d56c
author Junichi Uekawa <uekawa@google.com> 1596678023 +0900
committer Commit Bot <commit-bot@chromium.org> 1596777629 +0000

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>