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2026-08-30 - 14:15

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 30, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1174421450,3chrt0-21swapper/212:29:252
1174421450,3chrt0-21swapper/212:29:252
2288421320,3sleep20-21swapper/211:34:182
1202921010,2sleep010762-21/usr/sbin/munin12:29:270
1202921010,2sleep010762-21/usr/sbin/munin12:29:270
307232900,2sleep030725-21cut11:54:220
307232900,2sleep030725-21cut11:54:220
107992790,3chrt0-21swapper/208:09:162
107992790,3chrt0-21swapper/208:09:162
99992770,4chrt0-21swapper/209:34:102
99992770,4chrt0-21swapper/209:34:102
120102760,2sleep012011-21gzip11:04:210
120102760,2sleep012011-21gzip11:04:210
22392720,4chrt0-21swapper/212:04:252
310022710,3sleep20-21swapper/207:34:262
310022710,3sleep20-21swapper/207:34:262
107822680,3chrt0-21swapper/209:34:222
27962610,3sleep00-21swapper/010:39:240
27962610,3sleep00-21swapper/010:39:240
161602580,3sleep116166-21run-parts12:44:031
161602580,3sleep116166-21run-parts12:44:031
36922570,1chrt3690-21memory07:49:200
250552490,3sleep00-21swapper/011:39:180
250552490,3sleep00-21swapper/011:39:180
137152430,3chrt0-21swapper/211:09:172
137652420,2sleep113768-21timerwakeupswit12:34:271
137652420,2sleep113768-21timerwakeupswit12:34:271
22670994134,5cyclictest1-21systemd09:24:030
22670994134,5cyclictest1-21systemd09:24:030
140582400,4sleep00-21swapper/009:44:170
59982350,2sleep30-21swapper/310:49:163
59982350,2sleep30-21swapper/310:49:163
208962330,3sleep30-21swapper/308:34:253
22675993227,4cyclictest16043-21latency_hist08:24:031
22675993227,4cyclictest16043-21latency_hist08:24:031
22670993226,4cyclictest13852-21missed_timers11:09:190
22670993224,6cyclictest18044-21kernelversion09:54:180
22670993224,6cyclictest18044-21kernelversion09:54:180
22670993218,12cyclictest22653-21cyclictest10:25:250
22670993218,12cyclictest22653-21cyclictest10:25:250
22686993122,5cyclictest111212sleep311:04:043
22686993122,5cyclictest111212sleep311:04:043
22675993122,7cyclictest25726-21netstat10:14:201
22675993122,7cyclictest25726-21netstat10:14:201
22670993126,4cyclictest8496-21latency_hist08:04:030
22670993126,4cyclictest8496-21latency_hist08:04:030
22670993125,5cyclictest6023-21gltestperf10:49:160
22670993125,5cyclictest6023-21gltestperf10:49:160
22670993125,5cyclictest4470-21unixbench_singl12:09:270
22670993125,5cyclictest4470-21unixbench_singl12:09:270
22670993125,4cyclictest545-21in:imuxsock09:14:030
22670993125,4cyclictest545-21in:imuxsock09:14:030
22670993125,4cyclictest2806-21gltestperf09:14:170
22670993125,4cyclictest2806-21gltestperf09:14:170
22670993124,5cyclictest27731-21fschecks_time08:54:160
22670993124,5cyclictest27731-21fschecks_time08:54:160
22670993123,6cyclictest8633-21sendmail12:24:030
22670993123,6cyclictest8633-21sendmail12:24:030
22675993023,5cyclictest25839-21cut08:49:151
22675993023,5cyclictest25839-21cut08:49:151
22675993023,4cyclictest0-21swapper/110:04:031
22675993023,4cyclictest0-21swapper/110:04:031
22675993022,6cyclictest9075-21fschecks_count12:24:161
22675993022,6cyclictest6556-21fschecks_time09:24:191
22675993022,6cyclictest6556-21fschecks_time09:24:191
22670993023,5cyclictest1600-21cut12:04:170
22670993016,12cyclictest0-21swapper/011:59:160
22670993016,12cyclictest0-21swapper/011:59:160
22675992923,4cyclictest545-21in:imuxsock07:59:031
22670992921,6cyclictest545-21in:imuxsock08:35:180
22675992822,5cyclictest19341-21kernelversion11:24:171
22675992822,5cyclictest19341-21kernelversion11:24:171
22675992820,5cyclictest20716-21ntp_kernel_pll_08:34:221
22670992822,5cyclictest9965-21kernelversion10:59:190
22670992822,5cyclictest9965-21kernelversion10:59:190
22670992819,7cyclictest15268-21fschecks_count11:14:160
22670992819,7cyclictest15268-21fschecks_count11:14:160
22670992819,7cyclictest15268-21fschecks_count11:14:160
305392270,2sleep130538-21sshd11:54:191
305392270,2sleep130538-21sshd11:54:191
22675992722,3cyclictest0-21swapper/108:04:031
22675992722,3cyclictest0-21swapper/108:04:031
22675992719,6cyclictest9407-21unixbench_singl09:29:271
22675992719,6cyclictest9407-21unixbench_singl09:29:271
22675992719,6cyclictest28090-21latency_hist11:49:071
22675992719,6cyclictest28090-21latency_hist11:49:071
2267099272,9cyclictest700-21192.168.115.40-manager08:25:250
2267099272,9cyclictest700-21192.168.115.40-manager08:25:250
22670992721,4cyclictest1285-21cpu07:44:150
22670992721,4cyclictest1285-21cpu07:44:150
22670992721,4cyclictest11339-21ntp_kernel_pll_08:09:210
22670992721,4cyclictest11339-21ntp_kernel_pll_08:09:210
22670992721,4cyclictest0-21swapper/008:04:190
22670992720,5cyclictest13442-21switchtime08:14:250
22670992720,5cyclictest13442-21switchtime08:14:250
22670992720,4cyclictest0-21swapper/008:39:250
22670992720,4cyclictest0-21swapper/008:39:250
22670992719,6cyclictest570-21latency_hist09:09:080
22675992621,3cyclictest0-21swapper/111:49:261
22675992620,4cyclictest24029-21gltestperf08:44:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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