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2026-09-13 - 06:04

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Sun Sep 13, 2026 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1064821110,4sleep20-21swapper/221:19:282
1064821110,4sleep20-21swapper/221:19:282
1064821110,4sleep20-21swapper/221:19:282
171012870,2sleep30-21swapper/300:29:283
283372840,3sleep00-21swapper/022:04:370
283372840,3sleep00-21swapper/022:04:370
170102820,3sleep20-21swapper/200:29:282
76472710,2sleep20-21swapper/219:44:292
28653996661,3cyclictest7684-21fschecks_count00:04:300
131982640,2sleep013196-21sshd22:50:400
131982640,2sleep013196-21sshd22:50:400
226152620,2sleep30-21swapper/320:24:303
226152620,2sleep30-21swapper/320:24:303
193992590,2chrt0-21swapper/321:40:403
193992590,2chrt0-21swapper/321:40:403
128622580,2sleep20-21swapper/221:24:312
313512570,3chrt0-21swapper/322:14:293
99052540,2chrt0-21swapper/321:14:393
28653995445,7cyclictest0-21swapper/000:04:230
28653995445,7cyclictest0-21swapper/000:04:230
58842530,3sleep30-21swapper/319:39:283
58842530,3sleep30-21swapper/319:39:283
72212510,2chrt0-21swapper/121:09:301
197872500,2sleep019790-21latency_hist21:44:190
197872500,2sleep019790-21latency_hist21:44:190
179412500,3sleep30-21swapper/320:09:393
5762480,3sleep00-21swapper/023:44:310
44012460,3chrt0-21swapper/323:54:353
155622460,4chrt0-21swapper/220:04:312
88332450,3sleep3431rcuc/300:05:123
43242450,3sleep20-21swapper/223:54:342
322842430,2chrt32287-21unixbench-2d22:14:391
249432430,2sleep024936-21/usr/sbin/munin23:24:250
249432430,2sleep024936-21/usr/sbin/munin23:24:250
161122430,2sleep016114-21grep20:04:370
9642410,2chrt0-21swapper/320:54:173
28653993829,7cyclictest15387-21latency_hist22:59:160
231062380,3sleep20-21swapper/223:19:282
231062380,3sleep20-21swapper/223:19:282
231062380,3sleep20-21swapper/223:19:282
221812380,2sleep022345-21grep23:14:410
121362370,3sleep20-21swapper/219:54:392
2865499353,25cyclictest8218-21/usr/sbin/munin00:04:351
28654993429,3cyclictest7331-21kworker/u9:2-xprtiod00:04:251
28654993429,3cyclictest7331-21kworker/u9:2-xprtiod00:04:251
28654993425,7cyclictest23578-21kernelversion23:19:321
28654993425,7cyclictest23578-21kernelversion23:19:321
28654993425,7cyclictest23578-21kernelversion23:19:321
28653993429,3cyclictest0-21swapper/000:44:160
28653993429,3cyclictest0-21swapper/000:44:160
28654993327,4cyclictest1346-21avahi-daemon23:44:151
28654993327,4cyclictest1346-21avahi-daemon23:44:151
28654993327,4cyclictest1346-21avahi-daemon23:44:151
28654993326,5cyclictest28701-21ntp_offset20:39:351
28654993326,5cyclictest28701-21ntp_offset20:39:351
28654993325,6cyclictest6295-21processes19:39:341
28654993325,6cyclictest6295-21processes19:39:341
28653993327,4cyclictest28650-21cyclictest00:34:180
28653993326,5cyclictest14162-21threads00:19:400
28653993326,5cyclictest14162-21threads00:19:400
163802330,3chrt0-21swapper/221:34:322
163802330,3chrt0-21swapper/221:34:322
158192330,3sleep20-21swapper/200:24:372
158192330,3sleep20-21swapper/200:24:372
88162320,3sleep20-21swapper/200:04:592
2865599323,17cyclictest7414-21chrt00:04:232
2865599323,17cyclictest7414-21chrt00:04:232
28654993226,5cyclictest19619-21processes00:34:411
28654993223,7cyclictest9530-21fschecks_time19:49:301
28654993223,7cyclictest9530-21fschecks_time19:49:301
28653993224,6cyclictest24308-21needreboot21:54:330
28653993224,6cyclictest24308-21needreboot21:54:330
28654993125,4cyclictest16428-21fschecks_time21:34:321
28654993125,4cyclictest16428-21fschecks_time21:34:321
28653993125,5cyclictest11734-21unixbench_multi21:19:400
28653993125,5cyclictest11734-21unixbench_multi21:19:400
28653993125,5cyclictest11734-21unixbench_multi21:19:400
28654993024,4cyclictest11468-21head19:54:301
28654993023,5cyclictest15716-21needreboot00:24:351
28654993023,5cyclictest15716-21needreboot00:24:351
28653993025,3cyclictest28650-21cyclictest20:59:050
28653993024,4cyclictest11616-21cron22:49:150
28653993024,4cyclictest0-21swapper/019:49:160
28653993023,5cyclictest6415-21fschecks_time22:34:280
28653993023,5cyclictest6415-21fschecks_time22:34:280
28654992922,5cyclictest13892-21ntp_offset00:19:371
28654992922,5cyclictest13892-21ntp_offset00:19:371
28653992924,4cyclictest14678-21systemd-journal23:22:170
28653992923,4cyclictest14678-21systemd-journal19:52:070
28653992923,4cyclictest14678-21systemd-journal19:52:070
28653992922,5cyclictest26996-21fschecks_count23:29:270
28653992922,5cyclictest0-21swapper/023:54:400
28653992921,6cyclictest5766-21cut19:39:270
28653992921,6cyclictest5766-21cut19:39:270
271622290,5sleep30-21swapper/322:04:163
271622290,5sleep30-21swapper/322:04:163
271622290,5sleep30-21swapper/322:04:163
12542290,2sleep20-21swapper/220:54:292
28654992823,3cyclictest13825-21processes19:59:391
28654992822,4cyclictest30118-21fschecks_time20:44:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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