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Ran 12 Jun 2020 07:24AM UTC

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Committed 12 Jun 2020 07:24AM UTC coverage: 74.975%. First build

Job # TEST_SUITE=travis-build.sh

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push

travis-ci

Committed by Gautam Venkataramanan

Commit Message

Support for gprof profiler for libopflex and agent-ovs

- Config options added for libopflex and agent-ovs. By default its disabled.
- Gprof uses instrumentation and sampling to generate profiling data. Due to sampling it is fast, but might be inaccurate due to rate of sampling. But call counts and approximate call graphs will help pinpoint most common bottlenecks. More details here: https://ftp.gnu.org/old-gnu/Manuals/gprof-2.9.1/html_mono/gprof.html.
- To avoid overhead, gprof output is enabled only in vanilla agent-ovs build in travis (which will cover libopflex as well). And top 20 methods and top 100 lines of call stack are dumped for now.
- Will be useful to run it on standalone opflex-agent to analyze the bottlenecks.

Note: I tried perf as well. But the output was showing more info on kernel and system call profiling. Regarding call-graph with perf, it is suggested that we build with -fno-omit-frame-pointer. gprof should be good for now.

Signed-off-by: Gautam Venkataramanan <gautam.chennai@gmail.com>

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noironetworks / opflex / 737 / 1
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