You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-02-06 - 22:33

x86 Intel Xeon E3-1220L V2 @2300 MHz, Linux 4.4.229-rt200 (Profile)

Latency plot of system in rack #1, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -n -a -t3 -p99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot2.osadl.org (updated Mon Feb 06, 2023 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1487124028,0sleep30-21swapper/306:25:283
805723934,0sleep20-21swapper/206:21:022
1468923927,0sleep10-21swapper/106:23:181
1489123625,0sleep00-21swapper/006:25:410
8315060,0irq/26-0000:00:29499-21turbostat10:50:582
339960,0migration/37338-21sh09:44:123
339960,0migration/332630-21sh08:27:433
339960,0migration/320696-21taskset10:46:083
339960,0migration/319756-21sh11:21:073
339960,0migration/316610-21gltestperf11:01:173
339960,0migration/313830-21sh10:57:403
339960,0migration/312681-21sh09:29:573
329960,0watchdog/35296-21perl08:36:153
329960,0watchdog/313972-21ssh09:07:193
28015060,0irq/29-eth0-tx-0-21swapper/210:11:132
28005060,0irq/28-eth0-rx-8990-21python10:36:413
28005060,0irq/28-eth0-rx-3346-21snmpd08:52:273
28005060,0irq/28-eth0-rx-29066-21chrt06:33:153
28005060,0irq/28-eth0-rx-28082-21python10:11:253
28005060,0irq/28-eth0-rx-2336-21ssh08:32:003
28005060,0irq/28-eth0-rx-18547-21cut10:26:223
28005060,0irq/28-eth0-rx-16429-21users11:51:363
28005060,0irq/28-eth0-rx-14710-21iostat_ios09:31:213
149939965,0cyclictest5513-21pluginstate09:41:260
149939960,0cyclictest0-21swapper/010:04:090
149960,0migration/032622-21latency_hist11:45:580
149960,0migration/032529-21sh10:31:390
149960,0migration/023356-21sh11:40:390
8315050,0irq/26-0000:00:24601-21pmu-power09:16:212
8315050,0irq/26-0000:00:18104-21crond08:21:002
339950,0migration/34288-21kthreadcore11:11:213
339950,0migration/330868-21runrttasks09:39:523
339950,0migration/330045-21cpuspeed_turbos10:51:153
339950,0migration/329791-21missed_timers11:41:243
339950,0migration/328000-21munin-node08:56:133
339950,0migration/326671-21kthreadcore07:16:263
339950,0migration/32516-21sh09:59:353
339950,0migration/323551-21kthreadcore09:16:183
339950,0migration/321475-21latency_hist10:10:583
339950,0migration/318777-21kthreadcore07:11:223
339950,0migration/318442-21kthreadcore08:46:183
339950,0migration/31625-21kthreadcore07:21:233
339950,0migration/316016-21sh09:11:163
339950,0migration/313261-21kthreadcore07:51:213
339950,0migration/312424-21sh10:21:233
339950,0migration/310814-21kthreadcore07:06:243
329950,0watchdog/35460-21ssh09:03:353
329950,0watchdog/34358-21diskstats08:11:193
329950,0watchdog/328310-21kthreadcore06:56:203
329950,0watchdog/323614-21needreboot09:51:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional