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2026-09-22 - 20:59

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 792 highest latencies:
System rackeslot6s.osadl.org (updated Tue Sep 22, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
92490199735,19cyclictest1660-21snmpd11:20:001
924901996626,10cyclictest0-21swapper/107:15:301
924901996618,13cyclictest927047-21/usr/sbin/munin07:20:191
924901996245,11cyclictest930302-21sendmail07:40:001
924901996131,8cyclictest0-21swapper/109:15:311
92489899521,42cyclictest0-21swapper/012:30:010
92489899521,42cyclictest0-21swapper/012:30:010
924902995143,4cyclictest951708-21unixbench_singl09:40:272
924902995139,9cyclictest953448-21munin-plugin-st09:55:012
92489899513,22cyclictest15-21rcuc/010:30:010
92489899506,32cyclictest15-21rcuc/010:10:220
924898995033,13cyclictest131ktimers/011:50:160
924902994915,16cyclictest954504-21/usr/sbin/munin10:00:202
924901994920,26cyclictest958728-21/usr/sbin/munin10:25:181
924901994836,8cyclictest1283-21cron09:49:591
924902994729,9cyclictest0-21swapper/210:45:012
924902994720,16cyclictest927792-21cmp07:25:012
924901994735,6cyclictest167450irq/126-8000000.ethernet-tx107:50:291
92489899470,14cyclictest20850irq/208-8000000.ethernet07:20:000
924901994633,9cyclictest0-21swapper/108:35:001
924898994636,6cyclictest944517-21sh09:00:210
92489899461,9cyclictest0-21swapper/008:25:020
92489899461,9cyclictest0-21swapper/008:25:010
924902994536,4cyclictest975502-21grep12:00:292
924902994531,8cyclictest0-21swapper/210:20:292
924902994531,8cyclictest0-21swapper/210:20:292
924898994536,5cyclictest924065-21kworker/u8:0-events_freezable_power_08:15:000
924898994534,8cyclictest0-21swapper/008:30:290
924898994531,7cyclictest0-21swapper/008:35:280
924901994434,5cyclictest972151-21grep11:40:301
924901994432,9cyclictest943227-21munin-plugin-st08:55:001
924901994421,8cyclictest953645-21/usr/sbin/munin09:55:201
924898994430,9cyclictest0-21swapper/008:00:010
924902994320,15cyclictest0-21swapper/208:05:302
92490199431,31cyclictest948283-21grep09:20:311
924898994330,9cyclictest0-21swapper/010:40:260
924902994232,7cyclictest926839-21sendmail07:19:592
924902994230,8cyclictest0-21swapper/211:15:282
924902994229,9cyclictest981369-21grep12:35:272
924902994229,8cyclictest0-21swapper/210:50:322
924901994231,6cyclictest167450irq/126-8000000.ethernet-tx109:35:291
924901994230,8cyclictest974737-21sendmail12:00:001
92490199421,37cyclictest949124-21grep09:25:271
924898994229,9cyclictest0-21swapper/011:30:270
92489899421,39cyclictest0-21swapper/008:40:050
92489899421,39cyclictest0-21swapper/008:40:050
924902994131,4cyclictest0-21swapper/210:25:292
924902994130,7cyclictest0-21swapper/210:30:322
92490199419,16cyclictest965566-21/usr/sbin/munin11:05:211
92490199419,16cyclictest965566-21/usr/sbin/munin11:05:201
92490199413,5cyclictest970403-21grep11:30:281
92490199411,29cyclictest978858-21unixbench_multi12:20:281
92489899417,31cyclictest949188-21grep09:25:280
924898994136,2cyclictest0-21swapper/012:00:020
924898994135,4cyclictest20850irq/208-8000000.ethernet09:25:000
924898994134,4cyclictest20850irq/208-8000000.ethernet07:25:270
924898994130,8cyclictest0-21swapper/008:55:280
924898994130,8cyclictest0-21swapper/008:55:270
924898994130,7cyclictest0-21swapper/007:50:290
924898994130,5cyclictest0-21swapper/012:00:210
924902994031,4cyclictest0-21swapper/207:55:272
924902994029,8cyclictest0-21swapper/211:55:282
924902994029,7cyclictest0-21swapper/208:50:292
924902994026,9cyclictest0-21swapper/209:15:302
924902994023,9cyclictest0-21swapper/211:00:282
924902994023,10cyclictest0-21swapper/211:45:292
924902994020,11cyclictest0-21swapper/212:25:282
924902994020,11cyclictest0-21swapper/212:25:282
924901994029,5cyclictest167450irq/126-8000000.ethernet-tx110:55:281
924901994027,9cyclictest0-21swapper/110:35:271
924901994027,9cyclictest0-21swapper/110:35:271
924898994032,3cyclictest971977-21ptp4l11:40:280
924898994031,6cyclictest978049-21grep12:15:280
924898994031,6cyclictest930236-21grep07:35:280
924898994031,5cyclictest0-21swapper/009:30:320
924898994030,7cyclictest981175-21phc2sys12:35:260
924898994030,6cyclictest0-21swapper/011:10:020
924898994028,8cyclictest0-21swapper/011:35:190
92489899401,5cyclictest0-21swapper/008:15:200
92489899401,12cyclictest927113-21/usr/sbin/munin07:20:180
924902993930,7cyclictest936206-21munin-plugin-st08:15:002
924902993928,7cyclictest0-21swapper/210:35:282
924902993928,7cyclictest0-21swapper/210:35:272
924902993925,9cyclictest0-21swapper/209:35:292
924902993925,9cyclictest0-21swapper/207:10:212
924902993921,8cyclictest0-21swapper/212:10:302
924901993929,5cyclictest0-21swapper/111:00:291
924901993928,7cyclictest940833-21wc08:40:011
924901993924,9cyclictest0-21swapper/112:10:211
924901993912,19cyclictest969032-21/usr/sbin/munin11:25:181
924898993932,4cyclictest20850irq/208-8000000.ethernet11:00:000
924898993932,3cyclictest0-21swapper/009:50:150
924898993929,5cyclictest969740-21latency_hist11:30:010
92489899391,4cyclictest978397-21diskstats12:20:170
92489899391,35cyclictest0-21swapper/010:30:290
924902993826,7cyclictest0-21swapper/208:30:302
924901993829,5cyclictest0-21swapper/110:45:281
924901993828,5cyclictest977993-21grep12:15:281
924901993826,8cyclictest0-21swapper/112:05:271
924901993826,7cyclictest0-21swapper/108:05:301
924901993825,8cyclictest0-21swapper/112:35:001
924901993825,5cyclictest0-21swapper/109:50:311
924901993822,11cyclictest0-21swapper/108:30:011
92490199381,31cyclictest956185-21/usr/sbin/munin10:10:301
92490199381,29cyclictest979698-21grep12:25:281
92490199381,29cyclictest979698-21grep12:25:281
924898993831,5cyclictest20850irq/208-8000000.ethernet10:00:120
924898993831,4cyclictest20650irq/252-8000000.ethernet08:50:170
924898993827,8cyclictest0-21swapper/011:05:300
924898993825,9cyclictest0-21swapper/009:55:220
92489899381,5cyclictest967451-21grep11:15:180
92489899381,35cyclictest0-21swapper/010:15:250
924898993813,23cyclictest0-21swapper/008:00:210
924902993728,5cyclictest0-21swapper/208:15:282
924902993727,6cyclictest0-21swapper/211:34:592
924902993727,5cyclictest0-21swapper/208:55:292
924902993727,5cyclictest0-21swapper/208:55:292
924902993726,7cyclictest0-21swapper/210:10:312
92490199371,2cyclictest0-21swapper/108:45:021
92490199371,2cyclictest0-21swapper/108:45:011
924898993730,4cyclictest167350irq/118-8000000.ethernet-tx011:10:240
924898993730,4cyclictest167350irq/118-8000000.ethernet-tx011:10:230
924898993726,8cyclictest0-21swapper/008:45:290
924898993722,10cyclictest0-21swapper/009:40:020
92490299365,19cyclictest929654-21/usr/sbin/munin07:35:192
924902993630,4cyclictest955987-21munin-plugin-st10:10:002
924902993629,4cyclictest167550irq/134-8000000.ethernet-tx211:20:272
924902993628,4cyclictest0-21swapper/209:10:302
924902993628,4cyclictest0-21swapper/209:10:292
924902993627,6cyclictest0-21swapper/210:15:292
924902993627,4cyclictest0-21swapper/211:10:272
924902993627,4cyclictest0-21swapper/211:10:272
924902993625,8cyclictest966123-21grep11:05:292
924902993625,8cyclictest966123-21grep11:05:292
924902993624,9cyclictest0-21swapper/208:40:282
924902993624,9cyclictest0-21swapper/208:40:282
924902993622,9cyclictest0-21swapper/212:30:272
924901993622,10cyclictest0-21swapper/110:15:231
924901993620,9cyclictest0-21swapper/109:05:261
92490199361,9cyclictest0-21swapper/108:25:011
92490199361,9cyclictest0-21swapper/108:25:011
92490199361,8cyclictest0-21swapper/112:05:011
924898993630,3cyclictest0-21swapper/007:10:010
924898993629,4cyclictest20850irq/208-8000000.ethernet10:45:240
924898993629,4cyclictest20650irq/252-8000000.ethernet10:20:240
924898993629,4cyclictest20650irq/252-8000000.ethernet10:20:240
924898993629,4cyclictest20650irq/252-8000000.ethernet07:40:250
924898993627,7cyclictest20850irq/208-8000000.ethernet12:30:150
924898993626,5cyclictest0-21swapper/009:45:270
92489899362,4cyclictest947402-21find09:15:300
924898993624,8cyclictest968780-21grep11:20:280
924898993624,8cyclictest131ktimers/007:45:150
92489899361,33cyclictest0-21swapper/012:05:140
92489899361,33cyclictest0-21swapper/007:30:130
924902993526,6cyclictest969612-21unixbench_singl11:25:292
924902993525,7cyclictest0-21swapper/208:45:282
924902993524,8cyclictest0-21swapper/208:25:282
924902993524,7cyclictest0-21swapper/207:45:022
924902993524,4cyclictest0-21swapper/207:45:222
924902993522,8cyclictest0-21swapper/210:55:272
924901993525,6cyclictest0-21swapper/108:45:291
924901993525,5cyclictest0-21swapper/107:25:281
924901993521,9cyclictest0-21swapper/110:30:311
92490199351,4cyclictest0-21swapper/109:15:011
92490199351,4cyclictest0-21swapper/109:15:011
92490199351,27cyclictest973027-21sshd11:46:371
92489899357,4cyclictest932491-21kworker/0:2+events08:10:010
924898993529,3cyclictest0-21swapper/009:15:010
924898993529,3cyclictest0-21swapper/009:15:010
924898993528,4cyclictest20650irq/252-8000000.ethernet10:05:170
924898993528,4cyclictest20650irq/252-8000000.ethernet09:05:220
924898993527,5cyclictest0-21swapper/012:10:170
92489899351,32cyclictest0-21swapper/010:50:430
924902993423,7cyclictest0-21swapper/211:35:282
924902993420,9cyclictest0-21swapper/209:25:192
924902993414,15cyclictest0-21swapper/212:20:012
92490299341,2cyclictest0-21swapper/209:05:222
92490199346,15cyclictest931352-21/usr/sbin/munin07:45:191
924901993426,6cyclictest934463-21unixbench_singl08:00:301
924901993419,11cyclictest0-21swapper/110:20:281
924901993419,11cyclictest0-21swapper/110:20:271
924898993428,4cyclictest0-21swapper/008:25:140
924898993427,4cyclictest20650irq/252-8000000.ethernet09:40:120
924898993425,5cyclictest0-21swapper/010:35:240
924898993425,5cyclictest0-21swapper/010:35:240
924898993424,7cyclictest0-21swapper/011:04:590
92489899341,31cyclictest0-21swapper/011:47:240
924902993321,9cyclictest0-21swapper/207:50:262
924902993318,10cyclictest0-21swapper/207:30:262
924901993325,5cyclictest925704-21munin-run07:15:011
924898993327,3cyclictest924900-21date07:10:000
924902993222,5cyclictest0-21swapper/212:05:202
92490299321,25cyclictest0-21swapper/209:00:122
92490199328,11cyclictest22-21rcuc/107:40:021
92490199326,12cyclictest968193-21/usr/sbin/munin11:20:191
924901993227,3cyclictest937141-21sendmail08:19:591
92490299317,19cyclictest978324-21/usr/sbin/munin12:20:182
924902993121,7cyclictest0-21swapper/211:50:312
924902993120,9cyclictest311ktimers/210:45:052
924902993120,7cyclictest0-21swapper/209:45:292
92490199314,12cyclictest980844-21/usr/sbin/munin12:35:191
924901993122,7cyclictest933029-21/usr/sbin/munin07:55:191
924901993121,8cyclictest231ktimers/110:50:301
924902993022,2cyclictest0-21swapper/208:00:122
924902993019,6cyclictest0-21swapper/209:20:302
924902993016,7cyclictest940528-21grep08:35:292
924901993022,5cyclictest950072-21munin-plugin-st09:34:591
924901993021,5cyclictest0-21swapper/109:40:191
924901993021,5cyclictest0-21swapper/108:55:201
924901993021,5cyclictest0-21swapper/108:55:201
924901993020,6cyclictest936209-21http08:15:001
924902992921,5cyclictest14-21rcu_preempt09:30:192
924902992920,6cyclictest972189-21sshd11:42:372
924902992820,5cyclictest937134-21apt-get08:20:042
924902992820,5cyclictest937134-21apt-get08:20:042
924902992810,14cyclictest311ktimers/207:25:142
92490199277,16cyclictest966493-21/usr/sbin/munin11:10:171
92490199277,16cyclictest966493-21/usr/sbin/munin11:10:171
924901992720,4cyclictest0-21swapper/109:00:271
924901992718,7cyclictest231ktimers/110:40:191
92490199271,7cyclictest0-21swapper/111:40:011
92490199271,24cyclictest0-21swapper/107:32:371
924901992616,6cyclictest0-21swapper/110:00:191
92490199261,22cyclictest0-21swapper/111:53:041
924902992516,6cyclictest0-21swapper/209:55:312
924901992516,7cyclictest231ktimers/110:05:261
92490199249,6cyclictest0-21swapper/107:10:001
924902991914,3cyclictest925025-21latency_hist07:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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