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2026-07-21 - 03:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Tue Jul 21, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
114422116105,6sleep20-21swapper/219:09:382
11215210998,6sleep30-21swapper/319:06:443
2930721070,1sleep00-21swapper/021:44:580
11378210685,16sleep00-21swapper/019:08:480
11359210695,6sleep10-21swapper/119:08:331
94742920,0sleep30-21swapper/300:10:153
246332760,0sleep00-21swapper/022:45:300
163272740,1sleep20-21swapper/222:37:022
101792730,1sleep0101ktimersoftd/023:04:540
254242700,1sleep20-21swapper/223:53:342
36392670,0sleep10-21swapper/121:18:051
34732290,0sleep30-21swapper/300:04:413
1149899230,2cyclictest27571-21diskmemload23:15:121
1149799230,21cyclictest0-21swapper/022:30:110
11500992219,2cyclictest1302-21kworker/u8:121:56:053
11499992219,2cyclictest3638-21kworker/u8:222:40:052
11499992219,2cyclictest24853-21kworker/u8:222:02:052
11499992218,2cyclictest5322-21kworker/u8:021:22:042
1149799220,2cyclictest0-21swapper/020:55:130
314622210,1sleep10-21swapper/121:13:321
11500992118,2cyclictest29895-21kworker/u8:321:12:013
11500992117,2cyclictest12166-21kworker/u8:123:43:043
11499992118,2cyclictest3638-21kworker/u8:222:55:042
11499992118,2cyclictest3638-21kworker/u8:222:55:042
11499992118,2cyclictest3638-21kworker/u8:222:25:042
11499992118,2cyclictest29895-21kworker/u8:321:18:042
11499992118,2cyclictest22665-21kworker/u8:223:45:042
11499992118,2cyclictest22665-21kworker/u8:223:44:042
1149799210,2cyclictest0-21swapper/023:10:110
190602200,0sleep00-21swapper/020:46:030
11500992017,2cyclictest9778-21kworker/u8:120:36:043
11500992017,2cyclictest6072-21kworker/u8:000:39:043
11500992017,2cyclictest5322-21kworker/u8:021:34:043
11500992017,2cyclictest29664-21kworker/u8:122:54:013
11500992017,2cyclictest27938-21kworker/u8:020:00:043
11500992017,2cyclictest11854-21kworker/u8:121:38:043
11500992016,2cyclictest17811-21kworker/u8:122:42:043
1150099201,17cyclictest0-21swapper/323:15:133
11499992017,2cyclictest9778-21kworker/u8:120:34:042
11499992017,2cyclictest7352-21kworker/u8:221:09:052
11499992017,2cyclictest5322-21kworker/u8:021:48:012
11499992017,2cyclictest3638-21kworker/u8:222:48:012
11499992017,2cyclictest31547-21kworker/u8:200:06:052
11499992017,2cyclictest26152-21kworker/u8:200:30:052
11499992017,2cyclictest21737-21kworker/u8:222:13:042
11499992017,2cyclictest1302-21kworker/u8:121:50:042
1149799204,14cyclictest2486-21df_abs21:50:140
1150099192,2cyclictest0-21swapper/321:43:053
11500991916,2cyclictest7352-21kworker/u8:221:02:013
11500991916,2cyclictest29174-21kworker/u8:122:17:043
11500991916,2cyclictest27938-21kworker/u8:019:59:043
11500991916,2cyclictest27938-21kworker/u8:019:54:043
11500991916,2cyclictest21737-21kworker/u8:222:12:043
11500991916,2cyclictest16805-21kworker/u8:219:28:043
11500991916,2cyclictest12166-21kworker/u8:123:57:043
11500991915,3cyclictest19387-21kworker/u8:020:56:053
1150099190,2cyclictest0-21swapper/322:38:053
1150099190,14cyclictest0-21swapper/322:06:053
11499991916,2cyclictest9182-21kworker/u8:019:18:042
11499991916,2cyclictest9182-21kworker/u8:019:14:012
11499991916,2cyclictest8318-21kworker/u8:223:03:042
11499991916,2cyclictest7352-21kworker/u8:220:42:022
11499991916,2cyclictest7352-21kworker/u8:220:29:042
11499991916,2cyclictest6072-21kworker/u8:000:36:042
11499991916,2cyclictest27938-21kworker/u8:020:21:042
11499991916,2cyclictest27938-21kworker/u8:019:56:052
11499991916,2cyclictest26152-21kworker/u8:200:27:042
11499991916,2cyclictest22665-21kworker/u8:223:27:042
11499991916,2cyclictest22665-21kworker/u8:223:18:042
11499991916,2cyclictest21737-21kworker/u8:222:15:042
11499991916,2cyclictest19795-21kworker/u8:120:12:042
11499991916,2cyclictest19795-21kworker/u8:119:44:042
11499991916,2cyclictest17611-21kworker/u8:023:22:042
11499991916,2cyclictest16805-21kworker/u8:219:26:042
11499991916,2cyclictest16726-21kworker/u8:122:09:042
11499991916,2cyclictest11854-21kworker/u8:121:40:042
1149999190,2cyclictest0-21swapper/200:00:052
1149899190,4cyclictest0-21swapper/100:31:041
1149899190,14cyclictest7296-21unixbench_singl21:21:041
11497991914,3cyclictest15063-21ssh21:30:120
11497991913,4cyclictest8049-21rm21:22:120
202242180,0sleep00-21swapper/019:30:140
202242180,0sleep00-21swapper/019:30:140
11500991815,2cyclictest8318-21kworker/u8:223:11:043
11500991815,2cyclictest7352-21kworker/u8:220:44:043
11500991815,2cyclictest7352-21kworker/u8:220:27:043
11500991815,2cyclictest6309-21kworker/u8:023:35:043
11500991815,2cyclictest5322-21kworker/u8:021:48:053
11500991815,2cyclictest29895-21kworker/u8:321:20:043
11500991815,2cyclictest29664-21kworker/u8:123:04:043
11500991815,2cyclictest29174-21kworker/u8:122:20:043
11500991815,2cyclictest26152-21kworker/u8:200:32:043
11500991815,2cyclictest26152-21kworker/u8:200:28:013
11500991815,2cyclictest19795-21kworker/u8:120:14:043
11500991815,2cyclictest17811-21kworker/u8:122:45:043
11499991815,2cyclictest9778-21kworker/u8:120:47:042
11499991815,2cyclictest7352-21kworker/u8:221:04:012
11499991815,2cyclictest29664-21kworker/u8:123:05:042
11499991815,2cyclictest27938-21kworker/u8:020:05:042
11499991815,2cyclictest23861-21kworker/u8:219:47:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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