관리-도구

편집 파일: sk_stream_wait_memory.stp

#!/usr/bin/stap # Simple probe to detect when a process is waiting for more socket send # buffer memory. Usually means the process is doing writes larger than the # socket send buffer size or there is a slow receiver at the other side. # Increasing the socket's send buffer size might help decrease application # latencies, but it might also make it worse, so buyer beware. # # Typical output: timestamp in microseconds: procname(pid) event # # 1218230114875167: python(17631) blocked on full send buffer # 1218230114876196: python(17631) recovered from full send buffer # 1218230114876271: python(17631) blocked on full send buffer # 1218230114876479: python(17631) recovered from full send buffer probe kernel.function("sk_stream_wait_memory") { printf("%u: %s(%d) blocked on full send buffer\n", gettimeofday_us(), execname(), pid()) } probe kernel.function("sk_stream_wait_memory").return { printf("%u: %s(%d) recovered from full send buffer\n", gettimeofday_us(), execname(), pid()) }