1900850 - jstests is running a different number of tests on two different machines with the same commit.

Status: NEW

(Core :: JavaScript Engine, task, P3)

Description

[Matthew Gaudet (he/him) [:mgaudet]]

So here's a curiosity: On revision 0145baa9151f309dfdb4505d7f72f5244f0e569d, using the following mozconfig

ac_add_options --enable-application=js
ac_add_options --enable-optimize
ac_add_options --enable-debug
ac_add_options --enable-tests
mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/obj-opt-shell-@CONFIG_GUESS@
mk_add_options AUTOCLOBBER=1

I get the following test results from running on two different machines:

Xenon

$ ./mach jstests

[45926|    0|    0| 8419] 100% ======================================>| 156.3s
PASS

Zen

$ ./mach jstests

[45759|    0|    0| 8586] 100% ======================================>| 158.5s
PASS

What this bug is about: You can see that one machine runs 45926 test and skips 8419, but the other machine runs 45759 and skips 8586

It's curious to me that this is varying like this.