You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2025-11-18 - 23:51

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 Tue Nov 18, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291350980,0irq/25-eth10-21swapper/306:35:543
519724735,0sleep00-21swapper/006:38:550
506624536,0sleep10-21swapper/106:37:241
508023425,0sleep20-21swapper/206:37:332
53389976,0cyclictest12601-21cpuspeed_turbos06:45:010
339960,0migration/37832-21sh10:05:463
339960,0migration/32829-21aten_r1power_po09:44:583
339960,0migration/325411-21missed_timers11:40:043
339960,0migration/313105-21sh10:51:173
28415060,0irq/27-eth0-tx-20850-21munin-node07:40:010
28415060,0irq/27-eth0-tx-19833-21munin-node07:14:590
28415060,0irq/27-eth0-tx-0-21swapper/212:04:272
28415060,0irq/27-eth0-tx-0-21swapper/211:46:292
28415060,0irq/27-eth0-tx-0-21swapper/211:35:202
28415060,0irq/27-eth0-tx-0-21swapper/211:34:382
28415060,0irq/27-eth0-tx-0-21swapper/210:52:532
28415060,0irq/27-eth0-tx-0-21swapper/210:34:442
28415060,0irq/27-eth0-tx-0-21swapper/209:45:432
28415060,0irq/27-eth0-tx-0-21swapper/209:06:122
28415060,0irq/27-eth0-tx-0-21swapper/209:02:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional