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2026-06-29 - 05:55

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 Mon Jun 29, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2952621120,2sleep029531-21unixbench_multi00:28:300
2952621120,2sleep029531-21unixbench_multi00:28:300
2827121120,3chrt28266-21gzip21:33:241
2827121120,3chrt28266-21gzip21:33:241
525321100,2sleep15255-21awk21:58:241
525321100,2sleep15255-21awk21:58:241
525321100,2sleep15255-21awk21:58:241
2757921030,2chrt27580-21timerwakeupswit00:23:291
2757921030,2chrt27580-21timerwakeupswit00:23:291
152332980,3sleep10-21swapper/120:58:261
152332980,3sleep10-21swapper/120:58:261
324712950,2chrt32473-21sort20:18:221
324712950,2chrt32473-21sort20:18:221
129802920,2sleep30-21swapper/319:28:073
143692850,2sleep014368-21sed19:28:290
143692850,2sleep014368-21sed19:28:290
178532830,2chrt0-21swapper/319:38:293
178532830,2chrt0-21swapper/319:38:293
250552750,3sleep30-21swapper/319:58:233
250552750,3sleep30-21swapper/319:58:233
157472640,5sleep115746-21needreboot19:33:241
157472640,5sleep115746-21needreboot19:33:241
157472640,5sleep115746-21needreboot19:33:241
255212630,2sleep20-21swapper/221:28:062
255212630,2sleep20-21swapper/221:28:062
209192600,3chrt20922-21fschecks_time19:48:201
209192600,3chrt20922-21fschecks_time19:48:201
209192600,3chrt20922-21fschecks_time19:48:201
191372570,3sleep30-21swapper/319:43:193
191372570,3sleep30-21swapper/319:43:193
109342510,3sleep30-21swapper/322:13:263
109342510,3sleep30-21swapper/322:13:263
7911994842,3cyclictest0-21swapper/100:03:121
7911994842,3cyclictest0-21swapper/100:03:121
7911994842,3cyclictest0-21swapper/100:03:121
243952450,2sleep10-21swapper/121:23:231
243952450,2sleep10-21swapper/121:23:231
229152430,3chrt0-21swapper/200:13:212
229152430,3chrt0-21swapper/200:13:212
212632420,3chrt0-21swapper/322:43:093
212632420,3chrt0-21swapper/322:43:093
212632420,3chrt0-21swapper/322:43:093
7911994033,5cyclictest14266-21latency_hist20:58:071
37182400,2sleep13721-21cat23:23:061
7910993927,6cyclictest18905-21cut00:03:150
7910993927,6cyclictest18905-21cut00:03:150
7910993927,6cyclictest18905-21cut00:03:150
791199362,28cyclictest19653-21strings00:03:251
791199362,28cyclictest19653-21strings00:03:251
791099363,27cyclictest19579-21memory00:03:230
791099363,27cyclictest19579-21memory00:03:230
125952360,3sleep10-21swapper/122:18:221
125952360,3sleep10-21swapper/122:18:221
7911993427,5cyclictest3604-21if_err_eth020:28:201
7911993427,5cyclictest3604-21if_err_eth020:28:201
7911993426,5cyclictest32557-21latency_hist23:13:141
7911993426,5cyclictest32557-21latency_hist23:13:141
7910993326,5cyclictest26619-21mailstats21:28:280
7910993326,5cyclictest26619-21mailstats21:28:280
279112330,8sleep1281ktimers/122:58:261
279112330,8sleep1281ktimers/122:58:261
279112330,8sleep1281ktimers/122:58:261
7911993225,5cyclictest7159-21fschecks_time20:38:191
7911993225,5cyclictest7159-21fschecks_time20:38:191
7911993225,5cyclictest29424-21sshd20:08:321
7911993225,5cyclictest29424-21sshd20:08:321
7911993225,5cyclictest29424-21sshd20:08:321
7910993227,4cyclictest545-21in:imuxsock22:23:070
7910993227,4cyclictest545-21in:imuxsock22:23:070
7910993224,6cyclictest15221-21/usr/sbin/munin23:53:180
277602320,3sleep30-21swapper/322:58:243
277602320,3sleep30-21swapper/322:58:243
277602320,3sleep30-21swapper/322:58:243
7911993124,5cyclictest13873-21kernelversion23:48:221
7911993124,5cyclictest13873-21kernelversion23:48:221
7910993125,3cyclictest0-21swapper/020:03:060
7910993125,3cyclictest0-21swapper/020:03:060
7910993122,7cyclictest27090-21processes20:03:260
7910993122,7cyclictest27090-21processes20:03:260
7910993122,7cyclictest27090-21processes20:03:260
117012310,1sleep10-21swapper/123:43:221
117012310,1sleep10-21swapper/123:43:221
101082310,1sleep2351rcuc/220:43:282
101082310,1sleep2351rcuc/220:43:282
7911993025,3cyclictest21652-21kworker/u9:3-xprtiod21:52:251
7911993025,3cyclictest21652-21kworker/u9:3-xprtiod21:52:251
7911993024,4cyclictest26231-21latency_hist00:23:071
7911993024,4cyclictest26231-21latency_hist00:23:071
7911993023,5cyclictest11317-21/usr/sbin/munin19:23:181
7911993022,6cyclictest30711-21latency_hist23:08:171
7911993022,6cyclictest30711-21latency_hist23:08:171
7910993025,3cyclictest0-21swapper/021:23:060
7910993025,3cyclictest0-21swapper/021:23:060
7910993024,5cyclictest15774-21netstat19:33:240
7910993024,5cyclictest15774-21netstat19:33:240
7910993024,5cyclictest15774-21netstat19:33:240
7910993024,4cyclictest716-21latency23:13:220
7910993024,4cyclictest716-21latency23:13:220
7910993024,4cyclictest22886-21gltestperf19:53:210
7910993024,4cyclictest22886-21gltestperf19:53:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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