You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-04-23 - 01:33

OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

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 
Special  All - All RT - Optimization - Ethernet - Thumbnails - Next
  
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 50 highest latencies:
System rack1slot2s.osadl.org (updated Thu Apr 23, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450560,0irq/25-eth10-21swapper/318:56:123
1445423824,0sleep00-21swapper/018:54:510
1452623526,0sleep20-21swapper/218:55:412
1435423323,0sleep10-21swapper/118:53:401
339960,0migration/324739-21timerandwakeup23:43:023
339960,0migration/312438-21sh22:17:453
339960,0migration/312204-21sh21:15:163
29725060,0irq/27-eth0-tx-21632-21munin-node19:02:530
29715060,0irq/26-eth0-rx-20038-21smartctl23:22:543
29715060,0irq/26-eth0-rx-10840-21diskstats23:57:543
147709966,0cyclictest0-21swapper/122:36:361
147709960,0cyclictest0-21swapper/122:23:591
149960,0migration/02550-21ntp_offset21:28:000
149960,0migration/01764-21sh23:09:160
8215050,0irq/24-0000:00:29971-21sadc19:57:412
339950,0migration/38955-21needreboot19:38:003
339950,0migration/36210-21kthreadcore23:52:593
339950,0migration/34819-21munin-node22:12:543
339950,0migration/34588-21aten_r1power_en20:02:523
339950,0migration/3444-21kthreadcore20:22:583
339950,0migration/331686-21kthreadcore19:57:583
339950,0migration/32989-21diskmemload22:30:323
339950,0migration/329442-21irqrtprio19:07:563
339950,0migration/328693-21fschecks_time22:47:533
339950,0migration/328498-21kthreadcore23:47:593
339950,0migration/326686-21irqrtprio20:42:583
339950,0migration/324926-21kthreadcore19:52:583
339950,0migration/320966-21latency_hist21:02:413
339950,0migration/317865-21runrttasks22:58:123
339950,0migration/317824-21latency_hist20:12:413
339950,0migration/315871-21kthreadcore21:57:583
339950,0migration/314677-21kthreadcore20:32:573
339950,0migration/313924-21kthreadcore23:17:583
29725050,0irq/27-eth0-tx-9508-21ssh23:13:152
29725050,0irq/27-eth0-tx-4072-21ssh22:12:182
29725050,0irq/27-eth0-tx-3778-21kthreadcore23:52:582
29725050,0irq/27-eth0-tx-28024-21munin-node22:48:022
29725050,0irq/27-eth0-tx-27121-21which21:23:012
29725050,0irq/27-eth0-tx-20914-21ssh21:02:392
29725050,0irq/27-eth0-tx-20796-21munin-node22:02:542
29725050,0irq/27-eth0-tx-17121-21ssh00:21:022
29725050,0irq/27-eth0-tx-11288-21munin-node23:17:572
29725050,0irq/27-eth0-tx-0-21swapper/222:43:252
29725050,0irq/27-eth0-tx-0-21swapper/222:00:152
29725050,0irq/27-eth0-tx-0-21swapper/020:07:000
29725050,0irq/27-eth0-tx-0-21swapper/019:01:170
29715050,0irq/26-eth0-rx-3915-21uniq23:12:543
29715050,0irq/26-eth0-rx-3542-21lldpd23:08:003
29715050,0irq/26-eth0-rx-28539-21sh21:06:103
29715050,0irq/26-eth0-rx-28530-21cut23:27:583
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional