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2025-12-12 - 18:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 highest latencies:
System rack4slot1s.osadl.org (updated Fri Dec 12, 2025 06:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
633221400,1sleep30-21swapper/306:14:513
633221400,1sleep30-21swapper/306:14:513
633221400,1sleep30-21swapper/306:14:513
1304721390,5sleep013050-21wc05:41:000
1304721390,5sleep013050-21wc05:41:000
1304721390,5sleep013050-21wc05:41:000
1093121390,4chrt10913-21sh06:13:240
1093121390,4chrt10913-21sh06:13:240
1093121390,4chrt10913-21sh06:13:240
2869521330,3sleep20-21swapper/206:16:022
2869521330,3sleep20-21swapper/206:16:022
2869521330,3sleep20-21swapper/206:16:022
1072021300,2sleep20-21swapper/205:30:162
1072021300,2sleep20-21swapper/205:30:162
1072021300,2sleep20-21swapper/205:30:162
1103321190,3chrt0-21swapper/306:01:213
1103321190,3chrt0-21swapper/306:01:213
2878921160,2sleep128825-21sh06:14:171
2878921160,2sleep128825-21sh06:14:171
2878921160,2sleep128825-21sh06:14:171
1451221140,2sleep30-21swapper/305:45:453
910821120,3chrt0-21swapper/305:28:483
910821120,3chrt0-21swapper/305:28:483
915421100,2chrt0-21swapper/105:28:541
915421100,2chrt0-21swapper/105:28:541
1298721070,2sleep30-21swapper/306:04:313
1298721070,2sleep30-21swapper/306:04:313
1336921050,2chrt13371-21expr05:45:420
1137321050,2chrt11372-21pipe06:03:451
1137321050,2chrt11372-21pipe06:03:451
887221030,3chrt0-21swapper/305:54:363
887221030,3chrt0-21swapper/305:54:363
41921020,2sleep0445-21sh06:14:300
41921020,2sleep0445-21sh06:14:300
41921020,2sleep0445-21sh06:14:300
2063221020,2sleep30-21swapper/306:13:533
2063221020,2sleep30-21swapper/306:13:533
2063221020,2sleep30-21swapper/306:13:533
3223621010,2chrt32237-21expr06:12:571
3223621010,2chrt32237-21expr06:12:571
3223621010,2chrt32237-21expr06:12:571
1098521000,14sleep30-21swapper/305:32:593
1098521000,14sleep30-21swapper/305:32:593
1098521000,14sleep30-21swapper/305:32:593
1067921000,3sleep10-21swapper/105:29:511
1067921000,3sleep10-21swapper/105:29:511
1067921000,3sleep10-21swapper/105:29:511
112312940,2chrt0-21swapper/206:02:532
112312940,2chrt0-21swapper/206:02:532
84952920,2chrt7421-21execl05:54:221
84952920,2chrt7421-21execl05:54:221
126872910,2chrt0-21swapper/106:04:251
126872910,2chrt0-21swapper/106:04:251
130182890,1sleep20-21swapper/206:04:392
130182890,1sleep20-21swapper/206:04:392
50052820,3sleep15009-21rm05:43:471
50052820,3sleep15009-21rm05:43:471
50052820,3sleep15009-21rm05:43:471
72682810,2sleep07263-21execl05:53:280
72682810,2sleep07263-21execl05:53:280
180442790,2sleep018055-21spawn06:07:020
180442790,2sleep018055-21spawn06:07:020
65852770,4sleep16486-21dhry2reg05:48:581
33162740,1sleep20-21swapper/205:45:152
72862710,3sleep30-21swapper/305:53:433
72862710,3sleep30-21swapper/305:53:433
88302700,2sleep30-21swapper/305:43:583
88302700,2sleep30-21swapper/305:43:583
88302700,2sleep30-21swapper/305:43:583
202492650,1sleep20-21swapper/206:13:512
202492650,1sleep20-21swapper/206:13:512
202492650,1sleep20-21swapper/206:13:512
112142620,1sleep011227-21pipe06:02:520
112142620,1sleep011227-21pipe06:02:520
102632600,2sleep10-21swapper/105:38:081
127822590,2chrt0-21swapper/205:35:352
87582570,4chrt201rcuc/005:24:590
87582570,4chrt201rcuc/005:24:590
122742550,3sleep20-21swapper/205:42:322
122742550,3sleep20-21swapper/205:42:322
122742550,3sleep20-21swapper/205:42:322
91422520,2sleep20-21swapper/205:57:212
91422520,2sleep20-21swapper/205:57:212
88962520,3sleep20-21swapper/205:26:302
88962520,3sleep20-21swapper/205:26:302
127202520,3chrt0-21swapper/305:35:043
72852500,2chrt0-21swapper/205:53:422
72852500,2chrt0-21swapper/205:53:422
2857994416,3cyclictest0-21swapper/005:54:210
2857994416,3cyclictest0-21swapper/005:54:210
85252430,3sleep20-21swapper/205:23:572
2857994117,4cyclictest146-21systemd-journal06:22:540
2857994117,4cyclictest146-21systemd-journal06:22:540
2857993933,4cyclictest8421-21cron05:23:540
182762380,2sleep1271rcuc/106:29:131
182762380,2sleep1271rcuc/106:29:131
106832370,2sleep010255-21fstime05:29:550
106832370,2sleep010255-21fstime05:29:550
106832370,2sleep010255-21fstime05:29:550
16592350,1sleep03380-21spawn05:38:040
2858993124,5cyclictest23971-21kernelversion06:44:101
2858993124,5cyclictest23971-21kernelversion06:44:101
2858993124,5cyclictest23971-21kernelversion06:44:101
222512290,1sleep122289-21/usr/sbin/munin06:39:151
222512290,1sleep122289-21/usr/sbin/munin06:39:151
2858992820,6cyclictest7262-21execl05:53:301
2858992820,6cyclictest7262-21execl05:53:301
2858992719,6cyclictest6795-21fschecks_time05:19:091
2857992619,5cyclictest20200-21kernelversion06:34:080
2857992619,5cyclictest20200-21kernelversion06:34:080
2858992418,4cyclictest16590-21ntp_kernel_pll_06:24:131
2858992418,4cyclictest16590-21ntp_kernel_pll_06:24:131
2858992418,4cyclictest16590-21ntp_kernel_pll_06:24:131
2857992419,4cyclictest2856-21cyclictest06:39:160
2857992419,4cyclictest2856-21cyclictest06:39:160
2858992319,2cyclictest0-21swapper/106:19:101
2858992319,2cyclictest0-21swapper/106:19:101
2857992216,4cyclictest0-21swapper/006:44:060
2857992216,4cyclictest0-21swapper/006:44:060
2857992216,4cyclictest0-21swapper/006:44:060
2857992215,5cyclictest17769-21latency_hist06:29:040
2857992215,5cyclictest17769-21latency_hist06:29:040
2857992215,5cyclictest17769-21latency_hist06:29:040
2858992013,5cyclictest0-21swapper/106:34:151
2858992013,5cyclictest0-21swapper/106:34:151
2857992013,5cyclictest0-21swapper/006:29:110
2857992013,5cyclictest0-21swapper/006:29:110
286299181,12cyclictest18689-21chrt06:29:193
286299181,12cyclictest18689-21chrt06:29:193
286299171,12cyclictest23224-21chrt06:43:543
286299171,12cyclictest23224-21chrt06:43:543
285999173,10cyclictest0-21swapper/206:19:272
285999173,10cyclictest0-21swapper/206:19:272
286299162,10cyclictest0-21swapper/306:21:273
286299162,10cyclictest0-21swapper/306:21:273
286299161,11cyclictest24716-21chrt06:44:183
286299161,11cyclictest24716-21chrt06:44:183
286299161,11cyclictest24716-21chrt06:44:183
285999163,9cyclictest0-21swapper/206:43:372
285999163,9cyclictest0-21swapper/206:43:372
285999161,11cyclictest20279-21chrt06:34:082
285999161,11cyclictest20279-21chrt06:34:082
285999153,9cyclictest0-21swapper/206:27:272
285999153,9cyclictest0-21swapper/206:27:272
285999153,9cyclictest0-21swapper/206:27:272
286299146,5cyclictest161942sleep306:24:093
286299146,5cyclictest161942sleep306:24:093
286299146,5cyclictest161942sleep306:24:093
286299141,9cyclictest7077-21taskset05:19:113
285999145,6cyclictest19250-21chrt06:31:072
285999145,6cyclictest19250-21chrt06:31:072
286299131,9cyclictest20982-21chrt06:34:173
286299131,9cyclictest20982-21chrt06:34:173
285999135,6cyclictest25029-21chrt06:47:472
285999135,6cyclictest25029-21chrt06:47:472
285999135,6cyclictest25029-21chrt06:47:472
plot12:06:258
setyrange[0.8:*]5
setylabel"Numberoflatencysamples"6
setxrange[0:400]4
setxlabel"Latencyus-Maximumusplottedon2
settitle"Latencyrack4slot1s"0
setterminalpbmcolor1
setoutput"r4s1s.ppm"7
setlogscaley3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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