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2026-08-21 - 13:58

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 Fri Aug 21, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1746821010,3chrt0-21swapper/307:29:063
1746821010,3chrt0-21swapper/307:29:063
2958021000,2chrt29579-21sed09:28:550
253172900,3sleep30-21swapper/312:09:103
253172900,3sleep30-21swapper/312:09:103
28692750,3sleep00-21swapper/008:14:180
199902700,2sleep30-21swapper/311:54:143
199902700,2sleep30-21swapper/311:54:143
55572590,2sleep30-21swapper/309:49:123
55572590,2sleep30-21swapper/309:49:123
303302580,3sleep30-21swapper/310:54:173
303302580,3sleep30-21swapper/310:54:173
222952580,3sleep00-21swapper/009:09:050
222952580,3sleep00-21swapper/009:09:050
84502550,3sleep30-21swapper/308:29:163
289372540,3chrt0-21swapper/007:59:100
289372540,3chrt0-21swapper/007:59:100
209992530,2sleep20-21swapper/207:39:062
209992530,2sleep20-21swapper/207:39:062
273052500,2sleep027308-21kernelversion12:14:090
273052500,2sleep027308-21kernelversion12:14:090
134482500,3sleep013452-21latency_hist11:38:560
112492500,3sleep20-21swapper/208:39:082
112492500,3sleep20-21swapper/208:39:082
45852490,3chrt0-21swapper/309:48:443
45852490,3chrt0-21swapper/309:48:443
310092470,3chrt0-21swapper/208:04:112
310092470,3chrt0-21swapper/208:04:112
92322450,3sleep20-21swapper/211:24:192
172402450,2sleep00-21swapper/011:48:570
172402450,2sleep00-21swapper/011:48:570
114312450,3sleep30-21swapper/308:39:093
114312450,3sleep30-21swapper/308:39:093
190252430,3sleep20-21swapper/210:24:172
190252430,3sleep20-21swapper/210:24:172
165162390,3sleep30-21swapper/308:53:573
165162390,3sleep30-21swapper/308:53:573
12058993912,4cyclictest0-21swapper/110:34:171
12058993911,3cyclictest0-21swapper/112:04:181
12058993832,4cyclictest17788-21sendmail10:23:551
12058993832,4cyclictest17788-21sendmail10:23:551
1205899372,10cyclictest749-21runrttasks09:55:161
1205899372,10cyclictest749-21runrttasks09:55:161
1205899371,11cyclictest28660-21/usr/sbin/munin12:19:171
1205899371,11cyclictest28660-21/usr/sbin/munin12:19:171
1205899371,11cyclictest28660-21/usr/sbin/munin12:19:171
242552360,3chrt0-21swapper/210:39:122
242552360,3chrt0-21swapper/210:39:122
142402360,2sleep20-21swapper/208:44:192
1205899362,10cyclictest24890-21/usr/sbin/munin12:09:171
1205899362,10cyclictest24890-21/usr/sbin/munin12:09:171
12058993614,2cyclictest0-21swapper/109:29:091
12058993614,2cyclictest0-21swapper/109:29:091
12058993612,2cyclictest0-21swapper/110:44:171
12058993611,3cyclictest0-21swapper/111:14:081
12058993611,2cyclictest0-21swapper/111:54:181
12058993611,2cyclictest0-21swapper/111:54:181
1205899361,11cyclictest10870-21ls11:29:161
1205899361,11cyclictest10870-21ls11:29:161
49592350,2sleep2351rcuc/211:14:142
1205899351,12cyclictest9782-21grep09:59:161
1205899351,12cyclictest9782-21grep09:59:161
1205899351,12cyclictest25921-21unixbench_multi07:49:191
1205899351,12cyclictest25921-21unixbench_multi07:49:191
1205899351,11cyclictest27047-21awk07:54:081
1205899351,11cyclictest22640-21latency_hist07:43:591
1205899351,11cyclictest22640-21latency_hist07:43:591
1205899351,11cyclictest17919-21grep08:54:191
1205899350,12cyclictest27924-21/usr/sbin/munin09:24:121
1205899343,9cyclictest2564-21ntp_kernel_err12:34:121
12058993416,15cyclictest0-21swapper/110:33:551
12058993416,15cyclictest0-21swapper/110:33:551
12058993413,2cyclictest0-21swapper/110:43:551
12058993413,2cyclictest0-21swapper/110:43:551
12058993413,2cyclictest0-21swapper/108:44:051
1205899341,12cyclictest8774-21ntp_states11:24:151
1205899341,12cyclictest5463-21latency_hist12:43:571
1205899341,12cyclictest5463-21latency_hist12:43:571
1205899341,12cyclictest11222-21awk10:04:131
1205899341,12cyclictest11222-21awk10:04:131
1205899341,11cyclictest749-21runrttasks08:18:181
1205899341,11cyclictest11713-21tail08:39:121
1205899341,11cyclictest11713-21tail08:39:121
12057993429,3cyclictest32695-21cron11:03:550
12057993429,3cyclictest32695-21cron11:03:550
1205899338,3cyclictest0-21swapper/108:19:171
1205899338,3cyclictest0-21swapper/108:19:171
12058993313,2cyclictest0-21swapper/112:29:071
1205899331,12cyclictest3887-21mailstats09:44:181
1205899331,12cyclictest3887-21mailstats09:44:181
1205899331,12cyclictest29326-21grep10:54:061
1205899331,12cyclictest29326-21grep10:54:061
1205899331,11cyclictest433-21/usr/sbin/munin11:04:081
1205899331,11cyclictest433-21/usr/sbin/munin11:04:081
1205899331,11cyclictest27183-21grep09:19:181
1205899331,11cyclictest27183-21grep09:19:181
1205899331,11cyclictest15310-21latency_hist11:44:001
1205899331,11cyclictest15310-21latency_hist11:44:001
1205899331,11cyclictest15310-21latency_hist11:44:001
1205899331,10cyclictest749-21runrttasks10:26:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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