You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2025-06-12 - 15:09

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 20 highest latencies:
System rack1slot2s.osadl.org (updated Thu Jun 12, 2025 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2012325040,0sleep30-21swapper/306:45:273
1989123926,0sleep20-21swapper/206:42:462
1981523624,0sleep10-21swapper/106:41:531
1993323430,0sleep00-21swapper/006:43:160
249970,0watchdog/20-21swapper/210:32:432
4160,0ktimersoftd/00-21swapper/011:06:190
35160,0ktimersoftd/30-21swapper/310:17:363
339960,0migration/330691-21sh12:02:223
339960,0migration/322666-21sh11:17:283
339960,0migration/322666-21sh11:17:283
339960,0migration/322463-21sh08:55:383
339960,0migration/321259-21sh09:13:573
28415060,0irq/27-eth0-tx-3245-21munin-node07:25:560
28415060,0irq/27-eth0-tx-29967-21munin-node09:20:532
28415060,0irq/27-eth0-tx-18381-21munin-node08:05:560
28415060,0irq/27-eth0-tx-0-21swapper/212:11:312
28415060,0irq/27-eth0-tx-0-21swapper/212:05:442
28415060,0irq/27-eth0-tx-0-21swapper/212:01:202
28415060,0irq/27-eth0-tx-0-21swapper/211:45:542
28415060,0irq/27-eth0-tx-0-21swapper/211:43:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional