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The leap second bugThe leap second bugPosted Jul 10, 2012 0:14 UTC (Tue) by jzbiciak (✭ supporter ✭, #5246)In reply to: The leap second bug by dlang Parent article: The leap second bug
An actual berzerk poll loop, or mad context switches due to GC?
I had to disable various extensions to slay the memory leaks that were driving Firefox up to the 10-12GB range on me regularly. GC would regularly insert 3+ second pauses and run up the soft-fault count. (At least, I assume that's what it was doing... I had soft-fault counts in the billions.)
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The leap second bug Posted Jul 10, 2012 0:19 UTC (Tue) by dlang (✭ supporter ✭, #313) [Link]
It fairly commonly gets into a condition where it uses an entire CPU and when I do an strace on it, it's in some poll loop (it tries to read something, gets an error, does a poll, repeat)
This has been going on for several years, but is getting less common on recent versions (I am now running the Aurora versions everywhere, so my 'recent' may be newer than your 'current' :-)
The leap second bug Posted Jul 10, 2012 0:34 UTC (Tue) by jzbiciak (✭ supporter ✭, #5246) [Link]
Ah yep, that's the sort of mad poll loop I saw on Leap Second Day. I can't say for sure I've seen that any other time, though I will be popping up strace next time I see Firefox running up the cycles.
The leap second bug Posted Jul 10, 2012 1:01 UTC (Tue) by dlang (✭ supporter ✭, #313) [Link]
It's a race condition of some sort inside firefox. I'm one of those crazy people who have a couple hundred tabs open across a dozen or so windows and I've seen many cases where on startup, firefox would go into this mad loop. Just killing firefox and trying again would eventually get it out of the loop and operating sanely.
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