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2026-08-23 - 16:08

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 Aug 23, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1158121240,2sleep111579-21sed09:49:131
1158121240,2sleep111579-21sed09:49:131
3124521210,2sleep031210-21gltestperf07:49:120
595021000,1sleep10-21swapper/112:28:571
595021000,1sleep10-21swapper/112:28:571
59282940,4sleep30-21swapper/309:34:113
20112820,2chrt2014-21basename07:58:570
205882750,2chrt20584-21ntpq11:39:150
205882750,2chrt20584-21ntpq11:39:150
33042660,1sleep10-21swapper/112:19:201
33042660,1sleep10-21swapper/112:19:201
127392660,2sleep30-21swapper/309:53:573
127392660,2sleep30-21swapper/309:53:573
150272650,2sleep115030-21open_files11:24:161
42762630,2sleep20-21swapper/208:04:102
42762630,2sleep20-21swapper/208:04:102
92922610,3sleep30-21swapper/311:09:153
92922610,3sleep30-21swapper/311:09:153
73272580,2sleep07398-21gzip11:04:140
73272580,2sleep07398-21gzip11:04:140
141592540,2sleep114162-21unixbench_multi09:54:201
41892520,4chrt4192-21grep10:54:211
8332500,2chrt0-21swapper/212:14:102
34322490,4chrt0-21swapper/212:19:212
34322490,4chrt0-21swapper/212:19:212
116202490,3sleep20-21swapper/208:24:032
308752420,3sleep20-21swapper/207:49:022
199982420,2sleep20-21swapper/208:44:182
130032420,3sleep30-21swapper/311:19:163
130032420,3sleep30-21swapper/311:19:163
250672410,3sleep10-21swapper/110:24:181
250672410,3sleep10-21swapper/110:24:181
300772400,3sleep20-21swapper/209:13:322
300772400,3sleep20-21swapper/209:13:322
150262400,6sleep1281ktimers/109:59:101
150262400,6sleep1281ktimers/109:59:101
319092370,3sleep30-21swapper/310:44:103
319092370,3sleep30-21swapper/310:44:103
299682370,3sleep30-21swapper/307:44:173
87332360,2sleep10-21swapper/108:14:191
87332360,2sleep10-21swapper/108:14:191
18243993624,10cyclictest28986-21latency_hist12:03:570
18243993624,10cyclictest28986-21latency_hist12:03:570
18243993525,2cyclictest181rcu_preempt11:31:340
18243993525,2cyclictest181rcu_preempt11:31:340
18244993427,5cyclictest14021-21latency_hist11:23:571
18244993427,5cyclictest14021-21latency_hist11:23:571
288192330,1sleep3431rcuc/309:09:113
288192330,1sleep3431rcuc/309:09:113
269162330,2sleep20-21swapper/210:29:182
18244993329,3cyclictest90-1pr/ttyS009:30:401
18244993329,3cyclictest90-1pr/ttyS009:30:401
18244993328,3cyclictest28114-21cut10:34:101
117272330,3sleep20-21swapper/211:14:202
117272330,3sleep20-21swapper/211:14:202
18244993225,6cyclictest32714-21kernelversion09:19:141
18244993225,6cyclictest32714-21kernelversion09:19:141
18243993226,3cyclictest201rcuc/012:09:420
18243993214,12cyclictest2568-21tune2fs12:19:100
18243993214,12cyclictest2568-21tune2fs12:19:100
78922310,2sleep20-21swapper/209:39:142
78922310,2sleep20-21swapper/209:39:142
78922310,2sleep20-21swapper/209:39:142
18244993127,3cyclictest26117-21needreboot11:54:141
18244993126,4cyclictest735-21systemd-logind10:44:181
18244993126,4cyclictest735-21systemd-logind10:44:181
18244993126,4cyclictest60-21kcompactd008:09:231
18244993126,4cyclictest60-21kcompactd008:09:231
18244993126,3cyclictest90-1pr/ttyS008:27:381
18243993127,3cyclictest201rcuc/011:18:380
18243993127,3cyclictest201rcuc/011:18:380
18243993124,5cyclictest5590-21sshd08:06:400
18243993124,5cyclictest5590-21sshd08:06:400
18243993124,5cyclictest28416-21kernelversion10:34:130
18243993124,2cyclictest181rcu_preempt10:27:410
18243993124,2cyclictest181rcu_preempt10:27:410
18243993123,6cyclictest20792-21cut10:14:100
18243993122,3cyclictest181rcu_preempt11:48:220
18243993122,3cyclictest181rcu_preempt11:48:220
81332301,25sleep08296-21perl12:34:110
81332301,25sleep08296-21perl12:34:110
18244993025,2cyclictest0-21swapper/107:38:561
18244993023,5cyclictest6519-21sendmail11:03:561
18244993023,5cyclictest6519-21sendmail11:03:561
18244993023,5cyclictest32560-21cron07:53:571
18243993025,4cyclictest201rcuc/008:12:290
18243993025,4cyclictest201rcuc/008:12:290
18243993019,3cyclictest181rcu_preempt09:44:490
99192290,2sleep20-21swapper/212:39:072
99192290,2sleep20-21swapper/212:39:072
99192290,2sleep20-21swapper/212:39:072
246692290,4sleep30-21swapper/308:59:023
1824499294,22cyclictest281ktimers/111:31:341
1824499294,22cyclictest281ktimers/111:31:341
18244992925,3cyclictest9989-21cut08:19:111
18244992925,3cyclictest9989-21cut08:19:111
18244992923,5cyclictest1368-21threads07:54:191
18244992923,5cyclictest1287-21cut10:49:091
18244992923,5cyclictest1287-21cut10:49:091
18243992925,3cyclictest32581-21gltestperf09:19:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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