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2025-09-13 - 17:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

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 rackeslot6s.osadl.org (updated Sat Sep 13, 2025 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3925115999017,2cyclictest0-21swapper/010:10:010
392512099711,18cyclictest0-21swapper/211:10:012
3925120996931,32cyclictest0-21swapper/210:40:292
392511599681,3cyclictest0-21swapper/009:35:010
392511599681,3cyclictest0-21swapper/009:35:010
3925115996727,35cyclictest0-21swapper/010:00:300
3925115996726,4cyclictest0-21swapper/007:45:290
3925120996629,32cyclictest0-21swapper/207:10:282
3925115996618,7cyclictest0-21swapper/011:30:010
392512099654,35cyclictest0-21swapper/212:40:012
392511599652,4cyclictest3966648-21/usr/sbin/munin11:10:220
3925120996223,34cyclictest0-21swapper/207:45:232
3925120996220,7cyclictest0-21swapper/209:25:202
3925120996123,9cyclictest0-21swapper/208:30:192
3925120996120,4cyclictest168450irq/135-8000000.ethernet-tx209:20:192
3925117996127,29cyclictest3952571-21unixbench_multi09:45:331
3925115996124,11cyclictest3942333-21grep08:45:290
392512099601,33cyclictest0-21swapper/208:40:002
3925120995923,5cyclictest0-21swapper/211:30:292
3925117995945,8cyclictest3927841-21grep07:20:311
3925120995820,4cyclictest0-21swapper/207:55:222
3925117995817,17cyclictest3929789-21/usr/sbin/munin07:35:201
3925115995830,4cyclictest20950irq/209-8000000.ethernet07:15:020
3925115995714,18cyclictest3925110-21cyclictest11:30:140
3925120995520,5cyclictest0-21swapper/210:00:012
3925120995516,11cyclictest0-21swapper/212:30:012
3925115995528,4cyclictest20950irq/209-8000000.ethernet09:05:190
3925115995513,12cyclictest0-21swapper/007:12:310
3925120995424,5cyclictest0-21swapper/209:45:332
3925120995423,4cyclictest3941798-21/usr/sbin/munin08:45:182
3925117995445,5cyclictest3927117-21latency_hist07:20:001
392511599541,28cyclictest0-21swapper/011:00:080
3925120995325,6cyclictest0-21swapper/209:55:002
3925120995322,4cyclictest0-21swapper/212:05:212
3925120995316,13cyclictest0-21swapper/209:00:312
392511599531,25cyclictest0-21swapper/011:52:040
3925120995226,2cyclictest0-21swapper/208:00:302
3925120995223,9cyclictest3980601-21grep12:30:302
392512099521,4cyclictest3960774-21meminfo10:35:272
3925115995223,4cyclictest20950irq/209-8000000.ethernet10:30:330
3925120995122,4cyclictest3927792-21unixbench_multi07:20:302
3925120995117,7cyclictest0-21swapper/209:45:012
392511599517,23cyclictest3962062-21latency_hist10:45:010
3925115995127,4cyclictest3933724-21grep07:55:290
392511599511,4cyclictest0-21swapper/012:40:010
3925115995112,13cyclictest0-21swapper/008:39:120
3925117995027,16cyclictest231ktimers/109:05:121
3925115995028,4cyclictest20950irq/209-8000000.ethernet12:10:000
392511599501,43cyclictest0-21swapper/009:15:150
3925115995012,12cyclictest0-21swapper/011:07:470
3925120994919,8cyclictest0-21swapper/211:10:192
3925120994917,7cyclictest0-21swapper/210:49:592
392511599495,8cyclictest15-21rcuc/009:50:010
3925120994833,11cyclictest311ktimers/209:10:162
3925120994823,4cyclictest0-21swapper/209:30:192
3925120994823,4cyclictest0-21swapper/209:30:192
3925120994821,9cyclictest3957722-21sshd10:17:332
3925120994821,22cyclictest0-21swapper/210:30:322
3925120994817,8cyclictest0-21swapper/212:10:222
392512099481,29cyclictest0-21swapper/208:30:022
392512099481,29cyclictest0-21swapper/208:30:012
3925117994840,4cyclictest3935502-21munin-plugin-st08:09:591
3925117994828,13cyclictest3973787-21grep11:50:291
3925115994819,8cyclictest0-21swapper/012:30:300
392512099464,18cyclictest0-21swapper/208:10:012
3925120994617,4cyclictest0-21swapper/210:25:012
3925115994627,15cyclictest131ktimers/009:25:150
3925115994625,4cyclictest20950irq/209-8000000.ethernet11:20:130
3925115994625,4cyclictest20950irq/209-8000000.ethernet11:20:130
392512099451,29cyclictest0-21swapper/210:05:232
392512099451,27cyclictest0-21swapper/208:45:012
392512099451,24cyclictest0-21swapper/208:15:012
392511799456,8cyclictest24-21ksoftirqd/108:15:011
3925117994534,7cyclictest3970440-21grep11:30:301
3925117994434,6cyclictest3962751-21grep10:45:301
3925117994413,13cyclictest3925110-21cyclictest07:30:011
3925115994436,4cyclictest20750irq/251-8000000.ethernet07:20:150
3925117994328,10cyclictest0-21swapper/112:10:291
3925117994323,14cyclictest231ktimers/111:10:131
3925115994336,4cyclictest0-21swapper/008:55:150
3925115994318,6cyclictest27350irq/343-s-wl18xx09:40:290
392511599431,4cyclictest3948052-21tail09:20:280
392511599431,3cyclictest0-21swapper/008:30:130
392512099421,33cyclictest0-21swapper/210:55:002
3925117994230,8cyclictest0-21swapper/109:15:001
3925117994230,8cyclictest0-21swapper/108:55:331
3925117994229,8cyclictest3934606-21grep08:00:301
3925117994227,10cyclictest231ktimers/110:20:161
392511599424,5cyclictest0-21swapper/012:05:020
3925115994221,18cyclictest20750irq/251-8000000.ethernet10:10:150
3925120994133,5cyclictest3938025-21unixbench_multi08:20:292
392512099411,2cyclictest0-21swapper/207:50:012
3925117994128,6cyclictest0-21swapper/108:40:221
3925117994126,7cyclictest0-21swapper/111:25:311
3925117994125,10cyclictest0-21swapper/110:30:011
3925117994125,10cyclictest0-21swapper/110:30:011
3925115994132,5cyclictest0-21swapper/008:50:300
392511599411,8cyclictest3944929-21grep09:00:310
3925120994031,5cyclictest0-21swapper/208:55:332
3925120994030,7cyclictest3969622-21latency_hist11:30:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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