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2026-08-19 - 09:48

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 Wed Aug 19, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
250921450,1sleep10-21swapper/121:29:091
3153921420,3sleep10-21swapper/100:14:071
277492920,2sleep10-21swapper/100:04:061
277492920,2sleep10-21swapper/100:04:061
16742920,2chrt1677-21timerwakeupswit19:59:171
16742920,2chrt1677-21timerwakeupswit19:59:171
229962840,3sleep123001-21unixbench_multi19:29:141
191242590,3sleep119125-21/usr/sbin/munin23:39:141
191242590,3sleep119125-21/usr/sbin/munin23:39:141
191242590,3sleep119125-21/usr/sbin/munin23:39:141
21632500,2sleep2351rcuc/221:29:062
9182450,2sleep20-21swapper/200:19:072
9182450,2sleep20-21swapper/200:19:072
9182450,2sleep20-21swapper/200:19:072
1658499422,28cyclictest27498-21chrt00:03:563
1658499422,28cyclictest27498-21chrt00:03:563
16582993931,6cyclictest25535-21latency_hist23:58:531
16582993931,6cyclictest25535-21latency_hist23:58:531
213452360,4sleep021347-21grep23:44:150
213452360,4sleep021347-21grep23:44:150
16580993623,11cyclictest0-21swapper/000:04:070
16580993623,11cyclictest0-21swapper/000:04:070
70132350,2sleep07118-21mailstats20:14:160
70132350,2sleep07118-21mailstats20:14:160
16582993530,3cyclictest17304-21sendmail20:43:531
16582993530,3cyclictest17304-21sendmail20:43:531
101082350,2sleep20-21swapper/221:49:122
1658499342,25cyclictest28307-21chrt00:04:123
1658499342,25cyclictest28307-21chrt00:04:123
16580993428,4cyclictest25905-21cut19:39:070
16580993428,4cyclictest25905-21cut19:39:070
16580993426,6cyclictest16565-21cyclictest21:29:070
244172330,4sleep10-21swapper/119:34:121
267172320,3sleep00-21swapper/021:08:550
267172320,3sleep00-21swapper/021:08:550
168862320,2chrt0-21swapper/223:34:082
168862320,2chrt0-21swapper/223:34:082
1658399321,20cyclictest27619-21chrt00:04:032
16582993227,4cyclictest30001-21netstat19:49:121
16582993227,4cyclictest30001-21netstat19:49:121
16582993225,5cyclictest4053-21sshd20:08:051
16582993225,5cyclictest4053-21sshd20:08:051
16582993223,8cyclictest13689-21threads23:24:121
16582993223,8cyclictest13689-21threads23:24:121
16580993222,8cyclictest8650-21latency_hist23:13:530
16580993222,8cyclictest8650-21latency_hist23:13:530
187242310,1sleep30-21swapper/320:44:173
174772310,2sleep00-21swapper/022:09:080
174772310,2sleep00-21swapper/022:09:080
16582993126,3cyclictest16565-21cyclictest22:29:141
16582993126,3cyclictest0-21swapper/100:23:531
16582993126,3cyclictest0-21swapper/100:23:531
16582993126,3cyclictest0-21swapper/100:23:531
16582993126,2cyclictest0-21swapper/119:58:531
16582993126,2cyclictest0-21swapper/119:58:531
16582993125,4cyclictest0-21swapper/123:08:521
16582993125,4cyclictest0-21swapper/119:39:071
16582993125,4cyclictest0-21swapper/119:39:071
16580993125,5cyclictest27401-21latency_hist00:03:520
16580993125,5cyclictest27401-21latency_hist00:03:520
16580993125,4cyclictest23444-21cut20:59:070
16580993125,4cyclictest23444-21cut20:59:070
16580993122,7cyclictest5511-21cut00:29:160
16580993122,7cyclictest31854-21kernelversion00:14:100
16582993026,2cyclictest0-21swapper/122:24:121
16582993026,2cyclictest0-21swapper/122:24:121
16580993025,4cyclictest11657-21idleruntime-cro20:28:520
16580993025,4cyclictest11657-21idleruntime-cro20:28:520
16580993022,6cyclictest25137-21needreboot22:29:120
16580993022,6cyclictest11111-21head23:19:070
16580993022,6cyclictest11111-21head23:19:070
16580993022,6cyclictest11111-21head23:19:070
16584992913,6cyclictest0-21swapper/322:34:433
16582992924,3cyclictest0-21swapper/120:49:091
16582992924,3cyclictest0-21swapper/120:49:091
16582992923,4cyclictest0-21swapper/121:39:131
16582992923,4cyclictest0-21swapper/121:39:131
16580992924,4cyclictest19183-21gltestperf22:14:070
16580992924,4cyclictest19183-21gltestperf22:14:070
16580992923,4cyclictest31256-21tail22:44:150
16580992923,4cyclictest31256-21tail22:44:150
16580992923,4cyclictest3035-21latency_hist22:58:530
16580992922,5cyclictest27129-21sshd21:09:060
16580992922,5cyclictest21768-21latency20:54:090
16580992921,6cyclictest10451-21threads21:49:170
16584992813,6cyclictest0-21swapper/320:21:393
16584992813,6cyclictest0-21swapper/320:21:393
16582992823,4cyclictest14678-21systemd-journal22:58:071
16582992823,3cyclictest0-21swapper/100:43:521
16582992823,3cyclictest0-21swapper/100:43:521
16582992823,3cyclictest0-21swapper/100:43:521
16582992822,3cyclictest0-21swapper/123:19:151
16582992822,3cyclictest0-21swapper/123:19:151
16582992822,3cyclictest0-21swapper/123:19:151
16582992821,5cyclictest6930-21kernelversion00:34:081
16582992821,5cyclictest6930-21kernelversion00:34:081
16582992821,5cyclictest23265-21unixbench_singl23:49:171
16582992821,5cyclictest0-21swapper/121:44:151
16582992819,7cyclictest20529-21awk22:18:541
16582992819,7cyclictest20529-21awk22:18:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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