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2026-05-26 - 10:40

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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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 Tue May 26, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37490899700,38cyclictest0-21swapper/119:15:011
37490799701,59cyclictest0-21swapper/023:15:120
37490799701,59cyclictest0-21swapper/023:15:120
37490799651,61cyclictest0-21swapper/019:30:110
374911995649,4cyclictest311ktimers/200:10:012
374911995649,4cyclictest311ktimers/200:10:012
37490799561,53cyclictest0-21swapper/020:15:130
37491199548,11cyclictest30-21rcuc/223:05:002
374907995244,5cyclictest393051-21munin-plugin-st20:55:000
374908995136,9cyclictest0-21swapper/123:10:291
374907995139,9cyclictest0-21swapper/000:30:000
374907995135,10cyclictest0-21swapper/022:00:000
374907995043,4cyclictest167350irq/118-8000000.ethernet-tx022:20:180
374907995032,15cyclictest167350irq/118-8000000.ethernet-tx019:40:230
374907994915,31cyclictest397481-21latency_hist21:20:020
374907994840,5cyclictest405810-21munin-plugin-st22:10:000
374908994736,7cyclictest410787-21unixbench_multi22:35:281
374908994735,8cyclictest0-21swapper/123:40:011
374908994731,10cyclictest0-21swapper/120:15:301
374908994726,14cyclictest0-21swapper/100:15:291
374911994635,8cyclictest0-21swapper/223:45:002
374911994610,32cyclictest0-21swapper/219:20:022
374908994611,27cyclictest0-21swapper/120:55:291
374907994632,11cyclictest431332-21munin-plugin-st00:40:010
37490799461,2cyclictest0-21swapper/021:45:010
374907994610,4cyclictest131ktimers/022:53:180
374907994610,4cyclictest131ktimers/022:53:180
374911994529,13cyclictest311ktimers/223:55:132
374908994513,4cyclictest0-21swapper/123:50:281
37490899451,33cyclictest431220-21unixbench_multi00:35:291
374907994538,4cyclictest20650irq/252-8000000.ethernet23:55:250
374907994538,4cyclictest167350irq/118-8000000.ethernet-tx023:05:280
374907994537,4cyclictest167350irq/118-8000000.ethernet-tx019:45:240
374907994535,6cyclictest19750irq/27-20000000.i2c23:25:270
374907994528,14cyclictest167350irq/118-8000000.ethernet-tx022:47:180
37490799451,42cyclictest0-21swapper/023:35:120
37490799451,14cyclictest0-21swapper/019:25:200
37490799451,14cyclictest0-21swapper/019:25:200
37490899441,36cyclictest22-21rcuc/122:05:281
374907994437,4cyclictest167350irq/118-8000000.ethernet-tx021:35:270
374907994436,5cyclictest0-21swapper/020:45:000
374907994436,4cyclictest0-21swapper/023:20:280
37490799441,4cyclictest376284-21unixbench_multi19:15:100
374908994338,3cyclictest14-21rcu_preempt19:35:011
37490899431,34cyclictest380268-21unixbench_multi19:35:271
374907994338,3cyclictest0-21swapper/020:45:250
374907994338,3cyclictest0-21swapper/020:45:250
374907994336,4cyclictest167350irq/118-8000000.ethernet-tx000:30:170
374907994332,8cyclictest375019-21apt-key19:10:020
37490799432,38cyclictest0-21swapper/023:40:190
37490799431,4cyclictest386292-21munin-run20:15:000
37490799431,40cyclictest0-21swapper/000:20:300
374911994232,7cyclictest375782-21munin-plugin-st19:15:002
374911994230,9cyclictest387146-21sendmail20:19:592
374911994227,8cyclictest0-21swapper/219:25:302
374911994227,8cyclictest0-21swapper/219:25:302
374911994227,10cyclictest0-21swapper/220:10:292
374911994223,13cyclictest311ktimers/220:35:122
374908994230,8cyclictest0-21swapper/121:10:271
374908994230,7cyclictest397291-21http21:20:011
374908994229,8cyclictest274-21systemd-journal21:40:001
374908994228,6cyclictest409957-21grep22:30:301
37490799422,5cyclictest425492-21sed00:05:010
37490799421,38cyclictest411090-21grep22:40:170
37490799421,37cyclictest0-21swapper/020:00:190
37490799421,2cyclictest0-21swapper/021:05:010
374911994132,4cyclictest0-21swapper/221:25:302
374911994130,7cyclictest0-21swapper/200:25:302
374911994129,7cyclictest411683-21unixbench_singl22:40:302
374911994124,9cyclictest0-21swapper/221:00:282
374911994122,11cyclictest0-21swapper/220:40:272
374911994119,10cyclictest311ktimers/221:20:162
374908994129,9cyclictest0-21swapper/121:25:011
374908994128,8cyclictest0-21swapper/122:20:301
374908994127,9cyclictest0-21swapper/120:30:191
374907994135,3cyclictest0-21swapper/021:10:010
374907994133,4cyclictest167350irq/118-8000000.ethernet-tx000:10:170
374907994130,8cyclictest396429-21munin-plugin-st21:15:000
37490799412,5cyclictest427557-21irqstats00:15:240
37490799411,4cyclictest0-21swapper/023:05:010
37490799411,38cyclictest0-21swapper/021:20:170
374911994029,6cyclictest396323-21grep21:10:272
374908994028,8cyclictest0-21swapper/119:25:301
374908994028,8cyclictest0-21swapper/119:25:301
374908994028,7cyclictest0-21swapper/122:50:281
374908994028,7cyclictest0-21swapper/122:50:281
374908994027,9cyclictest0-21swapper/120:45:291
374908994027,9cyclictest0-21swapper/120:45:291
374908994027,8cyclictest0-21swapper/121:05:291
374908994025,9cyclictest0-21swapper/122:05:011
374908994016,12cyclictest394705-21grep21:00:291
374907994034,4cyclictest0-21swapper/019:55:130
374907994030,4cyclictest23850irq/422-mmc119:15:000
37490799401,4cyclictest402052-21/usr/sbin/munin21:45:230
37490799401,34cyclictest0-21swapper/023:00:010
37491199399,28cyclictest404675-21phc2sys-jitter22:00:272
374911993927,8cyclictest425346-21grep00:00:302
374911993927,7cyclictest0-21swapper/220:25:302
37490899394,10cyclictest418642-21gpgconf23:25:011
374908993929,5cyclictest0-21swapper/123:15:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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