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Firefox OS/Performance/Debugging OOMs: Difference between revisions
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Firefox OS/Performance/Debugging OOMs (view source)
Revision as of 17:42, 18 June 2013
, 18 June 2013→Step 2, option 3: Run B2G on your desktop
(Created page with "== How to debug a B2G OOM crash== B2G runs on severely memory-constrained devices, and it's easy for apps to exhaust the memory available on the system. When a process exhau...") |
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If worst comes to worst, you can run B2G on your desktop, which probably has much more RAM than your FFOS phone. This is tricky because B2G running on a desktop machine is a different in some key ways from B2G running on a phone. | If worst comes to worst, you can run B2G on your desktop, which probably has much more RAM than your FFOS phone. This is tricky because B2G running on a desktop machine is a different in some key ways from B2G running on a phone. | ||
In particular, B2G on desktop machines has multiprocess disabled by default. It doesn't really work 100% correctly anywhere, but it mostly works on Linux and Mac. (I'm not sure yet how to enable it.) | In particular, B2G on desktop machines has multiprocess disabled by default. It doesn't really work 100% correctly anywhere, but it mostly works on Linux and Mac. (I'm not sure yet how to enable it; for now, ask on #b2g and please update the wiki if you figure it out.) You can test on your desktop without multiprocess enabled, but in my experience a lot of our high memory usage issues are caused by our inter-process communication code, so that won't necessarily trigger the bug your'e seeing. | ||
It's also not as convenient to take memory reports from a B2G desktop process. On Linux, you can send signal 34 to the main B2G process and we'll write "memory-report-*.gz" files out to /tmp. | It's also not as convenient to take memory reports from a B2G desktop process. On Linux, you can send signal 34 to the main B2G process and we'll write "memory-report-*.gz" files out to /tmp. | ||