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2026-03-18 - 17:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rack2slot7s.osadl.org (updated Wed Mar 18, 2026 07:54:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1149034996856,8cyclictest1390418-21sort05:40:350
1149034996856,8cyclictest1390418-21sort05:40:350
1149034996555,7cyclictest1975544-21rm06:10:520
1149036996251,8cyclictest2026266-21sh06:13:012
1149035996137,21cyclictest1985014-21multi.sh06:11:191
114903599601,54cyclictest0-21swapper/106:07:461
114903599601,54cyclictest0-21swapper/106:07:461
1149036995946,9cyclictest1392345-21sh05:40:422
1149036995946,9cyclictest1392345-21sh05:40:422
1149034995942,13cyclictest0-21swapper/005:50:430
1149035995832,23cyclictest1398564-21sh05:40:581
1149035995832,23cyclictest1398564-21sh05:40:581
1149034995536,11cyclictest1958905-21sh06:10:020
1149034995536,11cyclictest1958905-21sh06:10:020
114903599491,36cyclictest0-21swapper/106:25:351
1149036994840,5cyclictest1892304-21multi.sh06:07:212
1149036994840,5cyclictest1892304-21multi.sh06:07:212
1149036994735,5cyclictest0-21swapper/205:50:432
114903599471,39cyclictest1151480-21ntpq05:10:361
114903599441,39cyclictest2031803-21ntpq06:30:381
114903599441,36cyclictest2027178-21ntpq06:15:331
114903599432,37cyclictest2028670-21ntpq06:20:361
1149035994321,19cyclictest0-21swapper/105:45:361
1149035994319,21cyclictest1150538-21systemd-run05:10:011
114903599431,38cyclictest2033241-21ntpq06:35:341
1149035994226,12cyclictest1848151-21spawn06:04:251
1149035994224,15cyclictest1463465-21systemd-run06:00:011
114903599421,37cyclictest1460952-21ntpq05:50:391
1149034994230,9cyclictest0-21swapper/005:49:350
1149036994133,5cyclictest1460048-21execl05:50:032
1149036994132,5cyclictest0-21swapper/205:20:332
114903599412,36cyclictest1157802-21ntpq05:30:331
1149034994127,11cyclictest1285197-21spawn05:35:010
1149036994032,5cyclictest2029318-21cron06:25:012
114903599391,35cyclictest1154913-21/usr/sbin/munin05:20:421
1149036993830,5cyclictest1152017-21cron05:15:012
1149036993829,6cyclictest1815415-21spawn06:04:172
1149034993831,4cyclictest1154451-21wc05:20:270
1149034993828,5cyclictest0-21swapper/005:10:350
1149035993714,21cyclictest1365420-21sh05:38:381
114903599361,31cyclictest1156180-21ntpq05:25:311
114903599361,31cyclictest1152938-21ntpq05:15:311
1149034993632,2cyclictest0-21swapper/005:20:010
1149034993629,5cyclictest1461917-21Run05:55:160
1149034993627,7cyclictest1804165-21spawn06:04:150
1149036993523,9cyclictest1381935-21wc05:40:022
114903599351,31cyclictest1148987-21munin-run05:05:011
1149034993528,4cyclictest1381892-21sh05:40:020
1149034993424,6cyclictest2029361-21rotate-stats06:25:010
114903499342,28cyclictest1155533-21fstime05:25:310
1149036993326,4cyclictest1158314-21grep05:30:452
1149034993318,11cyclictest0-21swapper/006:30:440
1149036993226,4cyclictest1149033-21cyclictest05:56:162
114903499328,17cyclictest151ktimers/006:25:380
1149036993125,3cyclictest0-21swapper/206:40:012
1149036993117,3cyclictest0-21swapper/205:25:342
1149036992921,5cyclictest1152626-21grep05:15:262
114903699285,6cyclictest36-21ksoftirqd/206:25:392
1149036992714,3cyclictest171rcu_preempt06:15:452
1149034992713,11cyclictest2026838-21fschecks_time06:15:270
114903699256,4cyclictest36-21ksoftirqd/206:30:372
1149036992519,4cyclictest351ktimers/205:10:012
1149034992519,3cyclictest3606335-21systemd-logind05:10:010
1149034992419,2cyclictest0-21swapper/006:35:440
114903699227,13cyclictest351ktimers/205:05:022
114903799194,9cyclictest0-21swapper/306:10:413
114903799193,9cyclictest0-21swapper/305:50:493
1149034991914,3cyclictest0-21swapper/005:05:020
114903799184,8cyclictest0-21swapper/305:40:403
114903799184,8cyclictest0-21swapper/305:40:403
114903799184,4cyclictest0-21swapper/305:15:333
114903799173,8cyclictest0-21swapper/305:55:433
114903799172,7cyclictest0-21swapper/305:45:353
114903799172,7cyclictest0-21swapper/305:30:363
114903799171,8cyclictest0-21swapper/306:05:343
114903799171,8cyclictest0-21swapper/306:05:343
114903799162,5cyclictest0-21swapper/306:00:253
114903799141,5cyclictest0-21swapper/305:05:313
114903799134,6cyclictest0-21swapper/306:25:013
114903799131,7cyclictest0-21swapper/305:35:343
114903799121,8cyclictest0-21swapper/305:20:313
114903799121,7cyclictest0-21swapper/305:10:353
114903799121,6cyclictest0-21swapper/306:30:353
114903799114,5cyclictest0-21swapper/305:25:323
114903799112,5cyclictest0-21swapper/306:25:333
114903799111,6cyclictest0-21swapper/306:35:343
114903799111,6cyclictest0-21swapper/306:20:013
11490379982,4cyclictest0-21swapper/305:05:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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