(Each star means one endorsement)
oprofile **
gprof *
papi
callgrind (part of valgrind)
sar *
strace *
(Compared to strace, I feel there are more occasions when ltrace is useful.)
systemtap
tcpdump
perf,
perf_events
--
libc
*Pin threads to CPUs. This prevents threads from moving between cores and invalidating caches etc. (sched_setaffinity)
See more http://virtualizationandstorage.wordpress.com/2013/11/19/algo-high-frequency-trading-design-and-optmization/
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