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Firefox/Projects/Startup Time Improvements/joelr notes: Difference between revisions
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Firefox/Projects/Startup Time Improvements/joelr notes (view source)
Revision as of 19:15, 24 August 2009
, 24 August 2009→August 24, 2009
Joel Reymont (talk | contribs) |
Joel Reymont (talk | contribs) |
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=== August 24, 2009 === | === August 24, 2009 === | ||
My DTrace scripts live [http://github.com/wagerlabs/firefox-startup/tree/master here]. | |||
=== DTrace tips and tricks === | |||
''vtimestamp'' measures CPU time of the current thread, excluding IO and DTrace overhead. ''timestamp'' can still be used for deltas but the goal is to use as few pid$target probes as possible as they affect ''timestamp'' when dtrace has to switch between kernel and userland. io and syscall providers are fast and run in the kernel. | ''vtimestamp'' measures CPU time of the current thread, excluding IO and DTrace overhead. ''timestamp'' can still be used for deltas but the goal is to use as few pid$target probes as possible as they affect ''timestamp'' when dtrace has to switch between kernel and userland. io and syscall providers are fast and run in the kernel. | ||
=== DTrace tips and tricks === | |||
Have you seen this kind of error before? | Have you seen this kind of error before? | ||