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2026-08-01 - 02:43

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 Fri Jul 31, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
354063996152,6cyclictest389023-21munin-plugin-st10:35:001
354062995512,38cyclictest0-21swapper/007:55:180
354062995442,8cyclictest363608-21munin-plugin-st08:05:010
35406299511,45cyclictest373793-21grep09:00:300
354063995042,5cyclictest356845-21cron07:25:001
354062995042,5cyclictest392402-21munin-plugin-st10:55:010
354066994839,4cyclictest0-21swapper/210:15:202
354063994841,4cyclictest360233-21munin-plugin-st07:44:591
35406299481,27cyclictest0-21swapper/007:50:010
354063994735,8cyclictest388148-21grep10:25:301
354062994638,4cyclictest167350irq/118-8000000.ethernet-tx008:35:000
354066994532,10cyclictest372976-21sendmail09:00:002
354063994532,8cyclictest0-21swapper/111:25:291
354062994535,7cyclictest0-21swapper/012:10:010
354062994523,19cyclictest20650irq/252-8000000.ethernet07:50:250
354062994523,19cyclictest20650irq/252-8000000.ethernet07:50:250
354066994435,5cyclictest0-21swapper/210:25:012
354066994432,8cyclictest0-21swapper/208:20:302
354063994434,6cyclictest383064-21unixbench_singl09:55:301
354063994434,6cyclictest383064-21unixbench_singl09:55:301
354062994437,4cyclictest167350irq/118-8000000.ethernet-tx012:30:220
354062994437,4cyclictest167350irq/118-8000000.ethernet-tx010:45:250
354066994331,9cyclictest406848-21sendmail12:19:592
354063994334,5cyclictest0-21swapper/108:05:311
354063994332,8cyclictest385642-21munin-plugin-st10:15:001
354063994329,9cyclictest0-21swapper/111:55:181
35406399432,33cyclictest397458-21unixbench_multi11:20:291
354062994334,5cyclictest376160-21sendmail_mailqu09:15:280
354062994334,5cyclictest376160-21sendmail_mailqu09:15:270
354062994334,5cyclictest0-21swapper/008:10:290
354062994329,10cyclictest0-21swapper/009:15:000
354062994328,11cyclictest0-21swapper/012:00:000
354066994231,8cyclictest0-21swapper/209:55:002
354063994233,5cyclictest0-21swapper/109:00:001
354063994223,7cyclictest0-21swapper/112:30:291
354062994236,3cyclictest20650irq/252-8000000.ethernet09:55:250
354062994236,3cyclictest20650irq/252-8000000.ethernet09:55:240
354062994236,3cyclictest0-21swapper/007:10:290
354062994236,3cyclictest0-21swapper/007:10:290
354062994231,7cyclictest0-21swapper/009:35:290
35406299421,38cyclictest380015-21df_inode09:40:170
354066994129,8cyclictest0-21swapper/212:05:292
354066994128,9cyclictest0-21swapper/210:30:012
354063994132,5cyclictest0-21swapper/108:45:301
354063994131,6cyclictest390621-21grep10:40:291
354063994131,5cyclictest400035-21grep11:35:281
354063994127,9cyclictest0-21swapper/107:10:301
354063994127,9cyclictest0-21swapper/107:10:301
354066994031,6cyclictest358441-21grep07:30:302
354066994030,7cyclictest398300-21grep11:25:272
354066994029,6cyclictest0-21swapper/208:25:302
354063994032,5cyclictest410221-21run-parts12:40:011
354063994031,6cyclictest361855-21grep07:50:331
354063994031,6cyclictest361855-21grep07:50:331
354063994031,5cyclictest0-21swapper/109:30:311
354063994030,7cyclictest0-21swapper/107:35:291
354063994029,7cyclictest0-21swapper/107:30:301
354063994027,7cyclictest402556-21grep11:50:291
354063994027,7cyclictest0-21swapper/112:00:291
354063994026,9cyclictest0-21swapper/110:55:021
354063994025,9cyclictest0-21swapper/110:20:291
35406399401,32cyclictest0-21swapper/108:00:291
354062994034,4cyclictest20850irq/208-8000000.ethernet09:55:000
354062994031,5cyclictest20850irq/208-8000000.ethernet07:40:000
35406299401,7cyclictest387234-21unixbench_multi10:20:290
354062994013,25cyclictest131ktimers/009:30:190
354066993930,4cyclictest0-21swapper/207:15:012
354066993926,9cyclictest0-21swapper/211:00:282
354066993926,8cyclictest0-21swapper/210:55:302
354066993924,11cyclictest0-21swapper/211:45:202
35406699391,32cyclictest410161-21unixbench_singl12:35:322
354063993930,5cyclictest0-21swapper/110:35:311
35406299393,31cyclictest0-21swapper/011:55:000
354062993931,4cyclictest167350irq/118-8000000.ethernet-tx008:25:210
354062993918,19cyclictest363873-21/usr/sbin/munin08:05:200
35406299391,36cyclictest0-21swapper/007:30:160
354066993830,4cyclictest0-21swapper/210:35:302
354066993828,6cyclictest0-21swapper/209:00:222
354066993827,8cyclictest0-21swapper/212:30:292
35406699382,32cyclictest407903-21/usr/sbin/munin12:25:192
35406399386,25cyclictest370011-21kernelversion08:40:241
354063993828,7cyclictest372015-21grep08:50:291
354063993828,7cyclictest372015-21grep08:50:291
354063993828,6cyclictest393224-21grep10:55:291
354063993828,6cyclictest360973-21grep07:45:301
354062993830,5cyclictest0-21swapper/011:15:180
354062993830,5cyclictest0-21swapper/011:15:180
354062993830,4cyclictest167350irq/118-8000000.ethernet-tx012:35:280
35406299381,4cyclictest0-21swapper/008:50:150
35406299381,4cyclictest0-21swapper/008:50:140
35406299381,3cyclictest404296-21users12:00:290
35406299381,2cyclictest0-21swapper/010:25:200
354066993727,7cyclictest0-21swapper/209:55:292
354066993727,7cyclictest0-21swapper/209:55:292
354066993727,6cyclictest0-21swapper/208:35:292
354066993727,5cyclictest0-21swapper/207:50:322
354066993727,5cyclictest0-21swapper/207:50:322
354066993725,7cyclictest0-21swapper/207:45:312
354063993729,5cyclictest407590-21grep12:20:251
354063993729,5cyclictest407590-21grep12:20:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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