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iAnatoly/bpftrace.sh

Created March 24, 2021 21:10
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bpftrace oneliners
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bpftrace.sh
# see https://github.com/iovisor/bpftrace/blob/master/docs/tutorial_one_liners.md
# histogram for udp_recvmsg timing
sudo bpftrace -e 'kprobe:udp_recvmsg { @start[tid] = nsecs; } kretprobe:udp_recvmsg /@start[tid]/ { @ns[comm] = hist(nsecs - @start[tid]); delete(@start[tid]); }'
# histogram for retval of udp_recvmsg (which is message size in bytes)
sudo bpftrace -e 'kretprobe:udp_recvmsg { @bytes[comm] = hist(retval); }'
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