dtrace_tips

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Gotcha: Running into limits●If you try to enable very large D scripts(hundreds of enablings and/orthousands of actions), you may findthat DTrace rejects it:●<strong>dtrace</strong>: failed to enable './biggie.d': DIFprogram exceeds maximum program size●●This can be worked around by tuning<strong>dtrace</strong>_dof_maxsize in/etc/system or via “mdb -kw”Default size is 256K
Page 1 and 2: Advanced DTraceTips, Tricks and Got
Page 3 and 4: DTrace Tips●●●Tips are pointe
Page 5 and 6: DTrace Gotchas●●●Like any sys
Page 7 and 8: Tip: Speculative tracing●●●
Page 9 and 10: Tip: clear and tick probes●●cle
Page 11 and 12: Tip: stop●●One may wish to stop
Page 13: Gotcha: stop gone haywire●●●B
Page 18: Tip: Allowing more pid probes●●
Page 21: Tip: Tuning away buffer drops●●
Page 26 and 27: Trick: Rates over time●●●For
Page 28 and 29: Gotcha: Using system● system is p
Page 30 and 31: Tip: -c option●●●●To observ
Page 32 and 33: Tip: Avoiding stripped stacks●●
Page 34 and 35: Gotcha: Slow user stacks●●●If
Page 36 and 37: Gotcha: Deadman●●●DTrace prot
Page 38 and 39: Trick: Stack filtering●●●Ofte
Page 40 and 41: Trick: Measuring DTrace●●Can ex
Page 42 and 43: Gotcha: Unsporting libraries●●
Page 44 and 45: Gotcha: Unsporting apps●●●Som
Page 46 and 47: Trick: Using GCC's preprocessor●
Page 48 and 49: Tip: Tuning $target evaluation●
Page 50 and 51: Gotcha: Enabled probe effect●●
Page 52 and 53: Trick: Higher-level profiling●●
Page 54 and 55: Gotcha: Fixed-length strings●●
Page 56: Team DTraceBryan CantrillMike Shapi

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