[KUDU-229] rwlock-perf doesn't work in a VMware VM

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: M4
• Component/s: perf
• Target Version/s: Backlog
• Assignee: Unassigned
• Reporter: Adar Dembo
• Created: 12/Apr/14 21:57
• Updated: 22/Jul/14 17:36

Description

Here's what I get when I run it:

        Test   Threads  Cycles
------------------------------
WARNING: Logging before InitGoogleLogging() is written to STDERR
F0412 19:52:08.029077 25130 locks.h:145] Check failed: (*__errno_location ()) == 0 (2 vs. 0) No such file or directory
*** Check failure stack trace: ***
Aborted (core dumped)

After some digging, the problem is in base::NumCPUs, which, by the way of InitializeSystemInfo, fails to open /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq and /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq (the /cpufreq subdir doesn't exist in my VM). These failures are non-fatal, but InitializeSystemInfo doesn't reset errno before returning, and locks.h complains about that.

I didn't see any open issues filed about this in gperftools. Not sure if we care enough to file one, or whether this is a bug in our code (locks.h).