指标不够用时的几条 bpftrace 一句话

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bpftrace -e 'tracepoint:block:block_rq_issue { @[comm, pid] = sum(args->bytes); }'

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bpftrace -e 'kprobe:tcp_retransmit_skb { @[comm] = count(); }'

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bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @ts[tid] = nsecs; }
tracepoint:raw_syscalls:sys_exit /@ts[tid]/ {
  @us[comm] = hist((nsecs - @ts[tid]) / 1000); delete(@ts[tid]); }'