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2026-05-01 - 15:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rack1slot2s.osadl.org (updated Fri May 01, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
191790,0ktimersoftd/129616-21perf06:56:441
304450350,0irq/25-eth10-21swapper/306:52:063
365023425,0sleep20-21swapper/206:54:382
384722723,0sleep00-21swapper/006:56:480
39249983,0cyclictest3356-21awk09:57:061
39249983,0cyclictest3163-21awk08:57:071
39249973,0cyclictest7811-21sadc08:36:541
39249973,0cyclictest14625-21awk08:17:071
39249972,0cyclictest2491-21awk10:57:061
39249970,0cyclictest23771-21kthreadcore09:07:091
39249970,0cyclictest12417-21needreboot08:12:111
4160,0ktimersoftd/02045-21diskmemload10:28:520
39269960,0cyclictest0-21swapper/211:45:242
39249962,0cyclictest3514-21snmpd09:05:281
39249962,0cyclictest3107-21awk10:17:051
39249962,0cyclictest27861-21awk09:12:071
39249962,0cyclictest25148-21irqcore07:12:091
39249962,0cyclictest1265-21awk08:07:081
39249962,0cyclictest11864-21awk09:22:071
39249961,0cyclictest9671-21awk12:22:061
39249961,0cyclictest1143-21munin-node11:37:031
39249961,0cyclictest10580-21awk11:02:071
39249960,0cyclictest9637-21ntp_offset06:57:131
39249960,0cyclictest6812-21cut10:37:071
39249960,0cyclictest29530-21grep09:32:111
39249960,0cyclictest29085-21kthreadcore11:12:081
39249960,0cyclictest28291-21grep08:52:061
39249960,0cyclictest27754-21kthreadcore08:02:101
39249960,0cyclictest2767-21munin-node09:17:131
39249960,0cyclictest27026-21perl10:32:051
39249960,0cyclictest26692-21fschecks_time10:52:051
39249960,0cyclictest26660-21kthreadcore11:52:091
39249960,0cyclictest26078-21latency_hist10:31:521
39249960,0cyclictest25508-21munin-run11:11:521
39249960,0cyclictest24763-21latency_hist12:11:521
39249960,0cyclictest23967-21ssh11:28:131
39249960,0cyclictest23759-21python10:47:141
39249960,0cyclictest23194-21kthreadcore08:47:101
39249960,0cyclictest22170-21kthreadcore11:47:091
39249960,0cyclictest20385-21cut09:47:081
39249960,0cyclictest19732-21irqcore10:07:091
39249960,0cyclictest19310-21munin-node07:32:081
39249960,0cyclictest19141-21basename09:27:041
39249960,0cyclictest18179-21tail07:07:051
39249960,0cyclictest17919-21ssh09:45:111
39249960,0cyclictest17252-21munin-node12:07:041
39249960,0cyclictest15791-21cut10:02:101
39249960,0cyclictest14852-21cut07:52:101
39249960,0cyclictest14790-21munin-node11:42:111
39249960,0cyclictest12016-21irqrtprio07:02:101
39249960,0cyclictest11777-21munin-node07:27:121
39249960,0cyclictest10980-21cut10:22:051
39249960,0cyclictest10705-21gltestperf10:42:051
39249960,0cyclictest10481-21sh09:41:521
39249960,0cyclictest0-21swapper/112:17:591
39249960,0cyclictest0-21swapper/111:58:071
39239966,0cyclictest0-21swapper/011:17:060
39239960,0cyclictest0-21swapper/011:42:290
339960,0migration/38328-21sh10:58:443
339960,0migration/31927-21sh09:35:423
339960,0migration/318056-21aten_r1power_en10:47:043
339960,0migration/317959-21sh10:26:393
339960,0migration/316621-21runrttasks11:04:273
339960,0migration/310597-21sh10:01:583
339960,0migration/310071-21munin-node11:42:063
29725060,0irq/27-eth0-tx-10847-21munin-node07:02:100
29715060,0irq/26-eth0-rx-319-21ssh11:56:153
29715060,0irq/26-eth0-rx-31261-21grep10:32:103
29715060,0irq/26-eth0-rx-12365-21grep09:22:093
29715060,0irq/26-eth0-rx-0-21swapper/310:52:363
29715060,0irq/26-eth0-rx-0-21swapper/310:11:353
149960,0migration/028477-21kthreadcore08:02:100
149960,0migration/024846-21sh11:10:010
149960,0migration/024494-21timerandwakeup10:07:150
149960,0migration/018057-21sh10:06:020
4150,0ktimersoftd/00-21swapper/009:59:510
39269955,0cyclictest0-21swapper/211:29:472
39269955,0cyclictest0-21swapper/211:02:122
39269955,0cyclictest0-21swapper/210:47:322
39269950,0cyclictest0-21swapper/212:04:192
39269950,0cyclictest0-21swapper/211:22:232
39269950,0cyclictest0-21swapper/210:54:292
39269950,0cyclictest0-21swapper/209:36:172
39249950,0cyclictest9426-21sh11:21:541
39249950,0cyclictest8970-21ssh12:01:531
39249950,0cyclictest8001-21ls08:36:541
39249950,0cyclictest8001-21ls08:36:541
39249950,0cyclictest5997-21cat07:46:541
39249950,0cyclictest5120-21munin-node07:22:031
39249950,0cyclictest31504-21latency_hist07:41:541
39249950,0cyclictest30527-21latency_hist07:16:541
39249950,0cyclictest27064-21basename08:27:041
39249950,0cyclictest26789-21rm09:51:551
39249950,0cyclictest26500-21grep10:11:531
39249950,0cyclictest25428-21cat11:31:521
39249950,0cyclictest24827-21latency_hist07:36:541
39249950,0cyclictest20325-21latency_hist08:21:541
39249950,0cyclictest19399-21cut07:57:041
39249950,0cyclictest14607-21date08:41:541
39249950,0cyclictest1274-21sed11:16:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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