dtrace_tips

More documents

Recommendations

Info

Gotcha: Unsporting apps●●●Some applications have strippedsymbol tables and/or static functionsMakes using the pid provider arduousCan still use the pid provider toinstrument instructions in strippedfunctions by using “-” as the probefunction and the address of theinstruction as the name:●# <strong>dtrace</strong> -n pid123::-:80704e3<strong>dtrace</strong>: description 'pid123::-:80704e3' matched 1probe
Trick: sizeof and profiling●●●sizeof historically works with typesand variablesIn DTrace, sizeof(function) yieldsthe number of bytes in the functionWhen used with profile provider,allows function profiling:profile-1234hz/arg0 >= `clock &&arg0
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 and 14: Gotcha: stop gone haywire●●●B
Page 17 and 18: Gotcha: Too many pid probes●●
Page 20 and 21: Gotcha: Buffer drops●●●●The
Page 25 and 26: Trick: Tracking object lifetime●
Page 27 and 28: Tip: Using system●●Use the syst
Page 29 and 30: Trick: system(“dtrace”)●●
Page 31 and 32: Gotcha: Stripped user stacks●●
Page 33 and 34: Trick: Using stop and ustack●●
Page 35 and 36: Tip: Ring buffering and -c/-p●●
Page 37 and 38: Tip: Tuning the deadman●●If the
Page 39 and 40: Trick: Watchpoints via pid●●●
Page 41 and 42: Trick: Iterating over structures●
Page 43: Gotcha: Unsporting functions●●
Page 47 and 48: Gotcha: $target evaluation●●●
Page 49 and 50: Gotcha: Data model mismatch●●
Page 51 and 52: Tip: Sample with profile●●●Wh
Page 53 and 54: Gotcha: vtimestamp●●●●vtime
Page 55 and 56: Tip: Demo DTrace scripts●●●/u

dtrace_tips

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?