You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2025-11-26 - 02:38

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 #0, slot #4

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 rack0slot4s.osadl.org (updated Wed Nov 26, 2025 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4080201070,105data-loop.00-21swapper/1019:05:272
4076201010,99data-loop.00-21swapper/619:07:5912
407620990,97data-loop.00-21swapper/319:06:539
407620980,96data-loop.00-21swapper/1419:08:456
407620970,95data-loop.00-21swapper/1119:05:243
407620920,90data-loop.00-21swapper/419:07:3810
407620900,89data-loop.00-21swapper/519:09:1311
407620900,89data-loop.00-21swapper/1319:05:475
407620840,83data-loop.00-21swapper/719:09:5413
407620830,82data-loop.00-21swapper/1219:06:344
408020810,80data-loop.00-21swapper/219:06:348
407620800,78data-loop.00-21swapper/919:05:1815
407620750,74data-loop.00-21swapper/1519:06:507
407620660,65data-loop.00-21swapper/119:06:001
407620660,65data-loop.00-21swapper/019:09:350
407620610,60data-loop.00-21swapper/819:05:5514
27631162590,0sleep50-21swapper/522:40:1611
2584303994038,2cyclictest0-21swapper/1022:40:172
258428799394,11cyclictest477704-21thunderbird21:38:4611
258428799394,11cyclictest477704-21thunderbird21:38:4511
2584284993939,0cyclictest0-21swapper/400:06:1410
2584278993835,2cyclictest2735652-21kworker/u32:0+flush-259:022:50:158
2584287993613,23cyclictest477704-21thunderbird21:27:4711
2584296993534,1cyclictest2777543-21kworker/u32:1+events_unbound00:10:1914
258429699340,30cyclictest2696719-21kworker/8:2+events22:00:1514
2584298993310,1cyclictest0-21swapper/920:14:4415
258428999330,30cyclictest0-21swapper/620:00:1512
2584284993331,0cyclictest2776352-21kworker/4:1+events23:27:2010
2584272993332,1cyclictest2822719-21kworker/u32:5+events_unbound00:17:260
2584303993227,4cyclictest2834774-21mii-tool00:05:152
2584289993232,0cyclictest2505054-1kworker/u33:1+i915_flip23:02:2412
258428799327,11cyclictest0-21swapper/500:01:3311
2584284993232,0cyclictest2776352-21kworker/4:1+events00:20:0110
2584284993231,1cyclictest2776352-21kworker/4:1+events23:59:5710
2584284993231,0cyclictest0-21swapper/423:40:1610
2584276993231,1cyclictest0-21swapper/120:16:041
2584276993230,2cyclictest0-21swapper/121:30:171
2584276993230,2cyclictest0-21swapper/121:30:161
2584272993231,1cyclictest2656226-21kworker/u32:2+flush-259:020:40:230
2584272993231,1cyclictest0-21swapper/022:25:080
258431999310,30cyclictest2675730-21daemon-init20:55:187
258431999310,30cyclictest0-21swapper/1523:40:227
258431499310,30cyclictest0-21swapper/1423:50:596
258431099310,1cyclictest0-21swapper/1320:32:505
2584308993128,2cyclictest477704-21thunderbird19:52:274
2584305993130,1cyclictest2395797-21snmpd20:16:483
258430599310,30cyclictest0-21swapper/1119:11:343
2584303993130,1cyclictest2395797-21snmpd21:09:112
258430399310,30cyclictest0-21swapper/1020:04:432
258429399310,30cyclictest0-21swapper/721:52:0713
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional