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Running a basic report will tell you what functions are showing up in the sampled profile the most.
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bcall@snowball trafficserver$ opreport --symbols /usr/local/bin/traffic_server | head
CPU: Core 2, speed 2003 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 100000
samples % image name app name symbol name
36603 8.1552 traffic_server traffic_server EThread::EThread()
13724 3.0577 traffic_server traffic_server LogBuffer::checkout_write(unsigned long*, unsigned long)
11137 2.4813 libpthread-2.11.1.so traffic_server pthread_mutex_trylock
10897 2.4279 traffic_server traffic_server HttpConfig::startup()
10702 2.3844 traffic_server traffic_server RecGetRecordPrefix_Xmalloc(char*, char*, int)
8869 1.9760 traffic_server traffic_server LogCollationClientSM::client_send(int, VIO*)
7952 1.7717 libc-2.11.1.so traffic_server memcpy |
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