| Server IP : 15.235.198.142 / Your IP : 216.73.216.218 Web Server : Apache/2.4.58 (Ubuntu) System : Linux ballsack 6.8.0-45-generic #45-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 30 12:02:04 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 8.3.6 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /usr/share/doc/bpfcc-tools/examples/tracing/ |
Upload File : |
Demonstrations of biolatpcts.py, the Linux eBPF/bcc version. This traces block I/O and uses layered percpu arrays to bucket the completion latencies. Latency percentiles are calculated periodically from the buckets. # ./biolatpcts.py p50=595.0us p75=685.0us p90=1500.0us p99=2500.0us p50=55.0us p75=95.0us p90=305.0us p99=2500.0us p50=385.0us p75=655.0us p90=1500.0us p99=2500.0us [...] The latency is measured from I/O request to the device, to the device completion. This excludes latency spent queued in the OS. This is a simplified example to demonstrate the calculation of latency percentiles. See tools/biolatpcts.py for the full utility.