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2026-06-28 - 03:10

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 Jun 27, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3900956996037,18cyclictest131ktimers/008:00:110
390096099597,11cyclictest32-21ksoftirqd/208:55:002
3900960995912,26cyclictest0-21swapper/210:40:012
3900960995343,6cyclictest3929243-21munin-plugin-st09:55:002
390095999536,32cyclictest3900953-21cyclictest10:05:011
3900956995340,10cyclictest3930084-21sendmail10:00:000
3900960995244,4cyclictest3948763-21munin-plugin-st11:50:002
3900960995215,12cyclictest30-21rcuc/208:15:012
3900956995245,4cyclictest3950384-21unixbench_singl11:55:290
3900960995143,5cyclictest3942842-21munin-plugin-st11:15:012
3900960995137,10cyclictest3947070-21munin-plugin-st11:40:002
3900960995137,10cyclictest3947070-21munin-plugin-st11:40:002
3900959995137,10cyclictest3913969-21munin-plugin-st08:25:001
3900959995137,10cyclictest3913969-21munin-plugin-st08:25:001
390095699516,41cyclictest0-21swapper/007:55:290
3900959995031,16cyclictest231ktimers/109:50:161
3900956995037,10cyclictest0-21swapper/008:20:000
3900960994935,8cyclictest0-21swapper/210:05:292
390095999491,27cyclictest0-21swapper/111:05:011
3900960994836,8cyclictest311ktimers/210:50:142
390095699485,29cyclictest20850irq/208-8000000.ethernet08:40:020
3900956994826,19cyclictest20650irq/252-8000000.ethernet11:25:140
390096099479,12cyclictest30-21rcuc/210:45:012
3900960994727,11cyclictest0-21swapper/208:35:242
3900959994739,5cyclictest3938537-21munin-plugin-st10:50:011
3900956994727,16cyclictest3937392-21cut10:40:250
3900960994639,4cyclictest32-21ksoftirqd/210:10:182
3900960994614,17cyclictest0-21swapper/209:55:112
3900956994629,11cyclictest0-21swapper/007:20:210
390095699462,41cyclictest0-21swapper/008:05:270
3900960994532,9cyclictest3957288-21munin-plugin-st12:40:002
3900960994532,7cyclictest0-21swapper/209:15:222
3900960994520,8cyclictest32-21ksoftirqd/208:05:012
3900960994519,9cyclictest30-21rcuc/209:40:022
390095999458,5cyclictest0-21swapper/108:50:011
390095999456,5cyclictest0-21swapper/111:15:021
3900956994537,5cyclictest3917326-21kworker/u8:1-events_power_efficient08:50:000
3900956994537,4cyclictest167350irq/118-8000000.ethernet-tx012:30:260
3900956994529,12cyclictest0-21swapper/011:00:010
390095699452,40cyclictest3923645-21ssh09:20:210
390095699451,42cyclictest0-21swapper/011:10:010
390095699451,41cyclictest0-21swapper/008:55:280
390096099445,14cyclictest32-21ksoftirqd/210:05:012
3900960994433,5cyclictest0-21swapper/208:15:292
3900960994432,7cyclictest3946107-21grep11:30:302
3900960994432,6cyclictest0-21swapper/208:35:012
3900960994429,8cyclictest3902896-21sendmail07:19:592
3900960994426,13cyclictest0-21swapper/207:55:012
3900959994435,5cyclictest0-21swapper/108:10:011
3900956994432,8cyclictest3946487-21df_inode11:35:180
3900956994432,8cyclictest3946487-21df_inode11:35:180
390095699442,4cyclictest3932619-21munin-run10:15:000
3900960994315,14cyclictest0-21swapper/210:20:132
3900956994335,4cyclictest167350irq/118-8000000.ethernet-tx011:20:270
3900956994335,4cyclictest167350irq/118-8000000.ethernet-tx011:20:260
390095699432,38cyclictest0-21swapper/007:53:230
3900960994236,3cyclictest311ktimers/208:40:222
390096099421,35cyclictest0-21swapper/209:45:202
390095999421,33cyclictest1653-21lldpd08:15:291
3900956994235,5cyclictest0-21swapper/008:50:170
3900956994232,5cyclictest3916823-21fschecks_count08:40:210
3900956994232,5cyclictest3906538-21/usr/sbin/munin07:40:160
3900956994228,9cyclictest0-21swapper/010:25:300
390095699421,8cyclictest0-21swapper/010:20:020
390095699421,38cyclictest0-21swapper/010:50:230
3900960994128,6cyclictest0-21swapper/210:30:202
3900960994128,6cyclictest0-21swapper/210:30:202
3900960994126,10cyclictest0-21swapper/212:25:272
390095999416,14cyclictest3901895-21df07:15:021
390095999416,14cyclictest3901895-21df07:15:021
390095999414,4cyclictest0-21swapper/111:55:011
3900959994134,4cyclictest3954758-21cron12:25:001
3900959994133,4cyclictest0-21swapper/107:20:001
3900959994132,5cyclictest3948660-21grep11:45:281
3900956994134,4cyclictest20650irq/252-8000000.ethernet11:45:160
390095699412,4cyclictest3924690-21meminfo09:25:250
390095699412,4cyclictest3924690-21meminfo09:25:250
390095699411,36cyclictest0-21swapper/011:15:010
390095699411,35cyclictest0-21swapper/011:45:010
3900960994035,3cyclictest311ktimers/209:30:012
3900960994035,3cyclictest311ktimers/209:30:012
3900960994030,5cyclictest3922453-21grep09:10:312
3900960994026,5cyclictest0-21swapper/211:50:262
3900960994025,9cyclictest0-21swapper/207:30:202
390095999405,7cyclictest3918180-21apt-get08:50:021
3900959994030,5cyclictest0-21swapper/111:25:001
3900959994030,5cyclictest0-21swapper/111:25:001
3900959994029,7cyclictest0-21swapper/108:10:301
3900959994025,9cyclictest0-21swapper/112:15:001
3900959994025,9cyclictest0-21swapper/112:15:001
3900956994029,8cyclictest0-21swapper/007:15:300
3900956994024,14cyclictest167350irq/118-8000000.ethernet-tx007:35:190
3900956994024,14cyclictest167350irq/118-8000000.ethernet-tx007:35:190
390095699402,3cyclictest3927222-21meminfo09:40:240
390095699401,4cyclictest3956965-21phc2sys12:35:270
390095699401,36cyclictest3950722-21df_inode12:00:180
390095699401,36cyclictest3950722-21df_inode12:00:170
3900960993931,5cyclictest311ktimers/212:00:162
3900960993931,5cyclictest311ktimers/212:00:162
390096099391,2cyclictest0-21swapper/208:25:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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