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2026-08-06 - 05:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Thu Aug 06, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168322770,4chrt16834-21awk23:39:021
168322770,4chrt16834-21awk23:39:021
168322770,4chrt16834-21awk23:39:021
91742760,2chrt9173-21ntpq23:18:590
91742760,2chrt9173-21ntpq23:18:590
245082660,2sleep124506-21grep19:39:031
245082660,2sleep124506-21grep19:39:031
291052650,1sleep00-21swapper/022:45:140
69502640,2sleep06951-21/usr/sbin/munin00:39:030
69502640,2sleep06951-21/usr/sbin/munin00:39:030
69502640,2sleep06951-21/usr/sbin/munin00:39:030
319222620,2sleep031923-21sed19:59:040
319222620,2sleep031923-21sed19:59:040
298122600,2chrt0-21swapper/322:48:553
298122600,2chrt0-21swapper/322:48:553
14200995748,7cyclictest0-21swapper/000:03:490
14200995748,7cyclictest0-21swapper/000:03:490
14200995748,7cyclictest0-21swapper/000:03:490
221792540,1chrt0-21swapper/023:53:560
221792540,1chrt0-21swapper/023:53:560
97502530,3sleep30-21swapper/320:28:543
97502530,3sleep30-21swapper/320:28:543
140412510,3sleep20-21swapper/223:33:482
140412510,3sleep20-21swapper/223:33:482
42562490,3sleep30-21swapper/320:13:543
42562490,3sleep30-21swapper/320:13:543
14200994939,5cyclictest0-21swapper/000:04:210
14200994939,5cyclictest0-21swapper/000:04:210
224202480,2sleep20-21swapper/222:28:522
325572470,3chrt0-21swapper/220:03:482
325572470,3chrt0-21swapper/220:03:482
1420299460,4cyclictest700-21192.168.115.40-manager19:46:181
1420299460,4cyclictest700-21192.168.115.40-manager19:46:181
257262450,4sleep20-21swapper/222:38:452
257262450,4sleep20-21swapper/222:38:452
26182440,3sleep30-21swapper/320:09:003
26182440,3sleep30-21swapper/320:09:003
66202430,2chrt0-21swapper/300:38:583
66202430,2chrt0-21swapper/300:38:583
66202430,2chrt0-21swapper/300:38:583
58292430,2chrt5831-21latency_hist00:38:430
58292430,2chrt5831-21latency_hist00:38:430
288852430,3chrt0-21swapper/221:18:572
288852430,3chrt0-21swapper/221:18:572
288852430,3chrt0-21swapper/221:18:572
181362430,3sleep00-21swapper/019:23:540
1420299421,2cyclictest700-21192.168.115.40-manager00:28:371
1420299421,2cyclictest700-21192.168.115.40-manager00:28:371
1420299410,3cyclictest700-21192.168.115.40-manager00:30:171
1420299410,3cyclictest700-21192.168.115.40-manager00:30:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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