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2026-07-02 - 04:27

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 Thu Jul 02, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450740,0irq/25-eth10-21swapper/318:47:493
2676123823,0sleep00-21swapper/018:50:110
2645223425,0sleep10-21swapper/118:46:311
2681623329,0sleep20-21swapper/218:50:492
35160,0ktimersoftd/30-21swapper/300:11:213
29725060,0irq/27-eth0-tx-4303-21munin-node20:11:200
29715060,0irq/26-eth0-rx-22965-21yum22:46:263
29715060,0irq/26-eth0-rx-16783-21ssh22:25:273
27160,0ktimersoftd/20-21swapper/223:13:402
269069966,0cyclictest0-21swapper/222:51:192
269069960,0cyclictest0-21swapper/221:10:342
19160,0ktimersoftd/10-21swapper/123:50:231
149960,0migration/07011-21sh23:38:490
149960,0migration/06335-21sh22:56:220
149960,0migration/031698-21sh22:32:380
149960,0migration/026959-21kthreadcore22:51:170
149960,0migration/022437-21sh23:47:010
149960,0migration/019985-21kthreadcore21:46:180
35150,0ktimersoftd/30-21swapper/323:13:403
339950,0migration/39846-21if_eth1.322:41:183
339950,0migration/37670-21unixbench_multi21:16:263
339950,0migration/37117-21kthreadcore19:21:193
339950,0migration/35466-21munin-node20:36:143
339950,0migration/329707-21munin-node23:51:223
339950,0migration/328245-21aten2.4-expect19:16:143
339950,0migration/325876-21munin-node21:51:133
339950,0migration/325679-21munin-node22:31:153
339950,0migration/324950-21runrttasks21:09:523
339950,0migration/319574-21kthreadcore19:31:193
339950,0migration/31922-21idleruntime22:16:153
339950,0migration/318144-21taskset20:42:453
339950,0migration/317470-21aten_r1power_fr22:06:143
339950,0migration/315224-21munin-node21:41:223
339950,0migration/312689-21kthreadcore00:01:193
339950,0migration/31188-21kthreadcore19:41:203
29725050,0irq/27-eth0-tx-8592-21munin-node23:01:182
29725050,0irq/27-eth0-tx-6902-21port_sshpriv21:56:212
29725050,0irq/27-eth0-tx-29074-21munin-node19:41:150
29725050,0irq/27-eth0-tx-13258-21ssh21:41:182
29725050,0irq/27-eth0-tx-0-21swapper/223:16:382
29725050,0irq/27-eth0-tx-0-21swapper/223:16:382
29725050,0irq/27-eth0-tx-0-21swapper/222:07:102
29715050,0irq/26-eth0-rx-9186-21irqcore19:01:173
29715050,0irq/26-eth0-rx-8848-21cpuspeed_turbos23:01:153
29715050,0irq/26-eth0-rx-8116-40yum-updatesd-he22:39:503
29715050,0irq/26-eth0-rx-7014-21ssh23:38:503
29715050,0irq/26-eth0-rx-529-21munin-node23:56:153
29715050,0irq/26-eth0-rx-4424-21aten2.4-expect20:11:133
29715050,0irq/26-eth0-rx-26755-21kthreadcore23:31:173
29715050,0irq/26-eth0-rx-23175-21ssh23:28:243
29715050,0irq/26-eth0-rx-23054-21load21:26:203
29715050,0irq/26-eth0-rx-1283-21df_abs20:56:153
29715050,0irq/26-eth0-rx-0-21swapper/323:46:083
29715050,0irq/26-eth0-rx-0-21swapper/323:41:183
29715050,0irq/26-eth0-rx-0-21swapper/323:21:563
29715050,0irq/26-eth0-rx-0-21swapper/323:07:033
29715050,0irq/26-eth0-rx-0-21swapper/322:11:183
29715050,0irq/26-eth0-rx-0-21swapper/322:04:043
29715050,0irq/26-eth0-rx-0-21swapper/321:57:493
29715050,0irq/26-eth0-rx-0-21swapper/321:48:263
29715050,0irq/26-eth0-rx-0-21swapper/321:31:133
29715050,0irq/26-eth0-rx-0-21swapper/321:21:193
29715050,0irq/26-eth0-rx-0-21swapper/321:11:083
29715050,0irq/26-eth0-rx-0-21swapper/319:51:133
29715050,0irq/26-eth0-rx-0-21swapper/300:16:183
269069955,0cyclictest0-21swapper/223:50:172
269069955,0cyclictest0-21swapper/221:14:022
269069955,0cyclictest0-21swapper/200:10:372
269069954,0cyclictest3514-21snmpd23:00:172
269069950,0cyclictest0-21swapper/223:58:002
269069950,0cyclictest0-21swapper/219:41:202
269059955,0cyclictest0-21swapper/123:19:111
269059955,0cyclictest0-21swapper/123:19:111
269059955,0cyclictest0-21swapper/123:07:031
269059955,0cyclictest0-21swapper/122:01:091
269059950,0cyclictest0-21swapper/123:12:151
269059950,0cyclictest0-21swapper/121:45:421
269059950,0cyclictest0-21swapper/121:12:071
259950,0migration/230493-21latency22:31:202
259950,0migration/213767-21rt-features23:41:212
259950,0migration/211975-21if_eth120:16:172
249950,0watchdog/20-21swapper/222:15:562
149950,0migration/09561-21fschecks_count19:26:160
149950,0migration/08349-21sh20:59:350
149950,0migration/08323-21munin-node23:21:110
149950,0migration/07558-21taskset22:17:020
149950,0migration/07226-21switchtime21:36:240
149950,0migration/06491-21taskset23:16:360
149950,0migration/06491-21taskset23:16:360
149950,0migration/05943-21kthreadcore21:56:180
149950,0migration/03440-21kthreadcore20:31:190
149950,0migration/031880-21runrttasks21:11:280
149950,0migration/031362-21kthreadcore20:06:190
149950,0migration/030768-21kthreadcore19:16:190
149950,0migration/026787-21kthreadcore23:31:170
149950,0migration/023456-21aten2.4-expect20:01:120
149950,0migration/021673-21kthreadcore23:06:180
149950,0migration/019660-21kthreadcore21:26:180
149950,0migration/019323-21kthreadcore19:56:200
149950,0migration/018529-21munin-node20:21:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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