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Find drop packets
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| # Place a probe to record calls and return values of enqueue_to_backlog | |
| sudo perf probe -a 'enqueue_to_backlog%return $retval' | |
| # Record for 60 seconds | |
| sudo perf record -e probe:enqueue_to_backlog -aR sleep 60 | |
| # Display calls | |
| sudo perf script |
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| swapper 0 [000] 3063713.001455: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.003087: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.003089: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.024984: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.036451: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| postgres 13545 [000] 3063713.036725: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81627df3) arg1=0 | |
| swapper 0 [000] 3063713.037679: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.038976: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.039360: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.040980: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.041198: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| postgres 10536 [003] 3063713.046677: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81627df3) arg1=0 | |
| swapper 0 [000] 3063713.048121: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| postgres 11707 [000] 3063713.048315: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.050607: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.053978: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.056323: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.061861: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.064675: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.099963: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 | |
| swapper 0 [000] 3063713.100650: probe:enqueue_to_backlog: (ffffffff81625030 <- ffffffff81628b7e) arg1=0 |
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