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LWN.net Weekly Edition for May 23, 2013
An "enum" for Python 3
An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
There's a comparison of the 4 horses in this race at:
It's worth noting that perf isn't really comparable to the other 3 systems because it has a lot more peformance impact. It's really intended more for profiling than for running in production.
Also, LTT-ng and DTrace are not in mainline.
Posted Oct 25, 2011 21:36 UTC (Tue) by oak (subscriber, #2786)
With LTTng you can profile "everything" happening in the system with pretty low overhead, i.e. when you still aren't sure what exactly is causing the issues. The others are intended for more targeted tracing where you often write your own script to trace things.
On other platforms than x86, one Systemtap issue is that it relies completely on kprobes instruction emulation to be correct. There were a lot of issues in that e.g. on ARM which have been only recently corrected.
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