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2026-06-15 - 08:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 rack9slot4s (updated Mon Jun 15, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
277419911031069,19cyclictest0-21swapper/019:25:170
277429910841064,16cyclictest28170-21df_inode19:25:121
274662575531,29sleep00-21swapper/019:22:400
273462469425,29sleep10-21swapper/119:21:251
192142990,4sleep041ktimersoftd/023:15:290
192142990,4sleep041ktimersoftd/023:15:290
151642410,9sleep02774199cyclictest20:15:140
151642410,9sleep02774199cyclictest20:15:130
27741993810,15cyclictest18304-21iostat_ios00:40:200
69392351,30sleep16943-21cron21:20:001
303842351,30sleep129346-21/usr/sbin/munin23:45:291
297052341,29sleep029767-21cut22:20:100
2774199337,5cyclictest40250irq/92-i91500:50:210
27741993315,14cyclictest3-21ksoftirqd/022:04:500
218102331,28sleep121983-21perl00:50:161
106562331,5sleep10-21swapper/121:29:271
2774199321,20cyclictest22390-21latency_hist20:35:010
2774199321,13cyclictest0-21swapper/000:08:510
2774299312,24cyclictest26057-21hddtemp_smartct23:35:161
27741993123,5cyclictest0-21swapper/021:05:290
27741993122,5cyclictest11565-21gdbus20:52:450
2774199312,23cyclictest11113-21iostat_ios22:55:190
27741993113,6cyclictest1237-21cstates22:30:140
27741993113,6cyclictest1237-21cstates22:30:140
27741993113,5cyclictest12064-21ntp_states20:05:260
27741993110,5cyclictest0-21swapper/019:40:000
196372311,5sleep10-21swapper/123:18:471
196372311,5sleep10-21swapper/123:18:471
27742993022,5cyclictest22-21ksoftirqd/123:20:261
27742993016,7cyclictest24706-21diskstats20:40:151
2774199303,13cyclictest16978-21tr23:10:230
2774199302,15cyclictest0-21swapper/000:03:250
27741993012,5cyclictest8853-21munin-run21:25:010
2774199301,14cyclictest2423-21sendmail00:00:000
27741993010,6cyclictest26710-21timerwakeupswit23:35:280
142872301,5sleep10-21swapper/121:38:071
122062301,5sleep10-21swapper/122:59:471
96082291,5sleep00-21swapper/000:16:010
4652291,5sleep10-21swapper/123:54:591
44032291,5sleep10-21swapper/122:36:551
320562291,5sleep10-21swapper/119:34:271
317792291,5sleep00-21swapper/019:31:330
290252291,5sleep00-21swapper/023:43:240
2774199299,7cyclictest15109-21awk00:30:280
27741992916,7cyclictest13050-21diskstats21:35:160
27741992911,5cyclictest5821-21iostat21:15:200
27741992910,14cyclictest49552chrt21:13:530
27342291,5sleep10-21swapper/121:06:111
25122291,5sleep10-21swapper/122:32:371
25122291,5sleep10-21swapper/122:32:361
231282291,5sleep10-21swapper/123:25:531
152712291,4sleep115280-21diskstats20:15:161
152712291,4sleep115280-21diskstats20:15:161
138572291,5sleep00-21swapper/023:02:140
136682291,5sleep10-21swapper/100:28:591
126172291,5sleep10-21swapper/120:06:391
104282291,5sleep00-21swapper/021:27:030
84712281,5sleep10-21swapper/121:21:131
82982281,5sleep00-21swapper/022:48:100
80732281,5sleep10-21swapper/100:14:351
69822281,5sleep00-21swapper/019:51:490
297692281,5sleep10-21swapper/120:53:561
2774299284,8cyclictest18699-21diskstats21:50:151
2774299284,18cyclictest32571-21diskstats19:35:151
27742992821,4cyclictest2047-21rs:main1
27742992820,5cyclictest26363-21aten_r4power_po20:45:111
27742992819,5cyclictest6243-21sh00:10:001
27742992818,6cyclictest9001-21sort00:15:221
27742992816,8cyclictest9210-21grep20:00:001
27742992811,14cyclictest17996-21taskset00:40:141
2774199289,6cyclictest10180-21ntp_states20:00:250
2774199285,11cyclictest3286-21runrttasks00:49:500
2774199284,17cyclictest4001-21diskstats19:45:150
2774199282,13cyclictest11565-21gdbus21:33:140
27741992812,5cyclictest29935-21interrupts23:45:190
27741992811,5cyclictest32420-21tune2fs21:00:160
2774199281,15cyclictest24659-21expr20:40:130
2774199281,13cyclictest18818-21fschecks_time21:50:160
27741992811,14cyclictest0-21swapper/020:13:200
27741992810,5cyclictest16816-21df_inode21:45:160
27741992810,5cyclictest16816-21df_inode21:45:150
272572281,5sleep00-21swapper/022:11:040
257182281,5sleep10-21swapper/122:09:341
250392281,5sleep10-21swapper/123:31:121
238302281,5sleep10-21swapper/120:35:561
236722281,5sleep10-21swapper/122:02:501
202402281,5sleep10-21swapper/120:27:361
181782281,5sleep10-21swapper/121:49:241
181782281,5sleep10-21swapper/121:49:231
177952281,5sleep10-21swapper/123:14:091
138002281,5sleep10-21swapper/123:01:391
116012281,5sleep00-21swapper/000:22:000
10512281,4sleep10-21swapper/121:03:371
315152271,4sleep10-21swapper/120:57:321
289992271,5sleep10-21swapper/123:43:061
289022271,5sleep10-21swapper/122:15:301
2774299274,17cyclictest10781-21iostat_ios00:20:211
2774299273,18cyclictest17182-21diskstats20:20:161
2774299273,17cyclictest5486-21iostat_ios22:40:201
2774299272,13cyclictest0-21swapper/120:01:171
27742992714,7cyclictest2019-21diskstats19:40:151
2774299271,22cyclictest30118-21fschecks_time22:20:161
2774199279,5cyclictest21331-21switchtime21:55:290
2774199278,6cyclictest31823-21/usr/sbin/munin23:50:210
2774199278,6cyclictest23116-21irqstats20:35:210
2774199272,3cyclictest81rcu_preempt22:18:110
27741992715,7cyclictest1974-21lldpad19:58:280
2774199271,13cyclictest3286-21runrttasks22:40:260
2774199271,11cyclictest837-21cron22:30:000
232702271,5sleep00-21swapper/023:27:210
220282271,5sleep10-21swapper/120:31:431
173342271,5sleep10-21swapper/100:38:041
159512271,4sleep10-21swapper/121:40:461
153372271,5sleep10-21swapper/100:31:501
130972271,5sleep10-21swapper/120:10:051
81222261,5sleep10-21swapper/122:46:211
27742992617,5cyclictest27637-21cron22:15:001
27742992611,11cyclictest0-21swapper/123:05:261
2774199269,5cyclictest12453-21fschecks_time00:25:180
2774199268,5cyclictest1770-21wget19:40:100
2774199263,16cyclictest24292-21irqstats23:30:180
2774199263,16cyclictest19774-21python20:25:280
2774199262,6cyclictest11565-21gdbus22:05:410
2774199261,16cyclictest0-21swapper/023:09:180
2774199261,12cyclictest4642-21seq22:39:230
27741992610,14cyclictest0-21swapper/022:53:310
218862261,5sleep10-21swapper/121:58:591
48882251,4sleep10-21swapper/121:13:101
27742992516,5cyclictest3286-21runrttasks19:45:111
27742992515,6cyclictest11101-21wc21:30:131
2774199258,5cyclictest16381-21iwlist00:35:190
2774199252,7cyclictest17464-21/usr/sbin/munin20:20:180
2774199251,10cyclictest0-21swapper/020:56:300
263122251,5sleep00-21swapper/020:45:100
215122251,3sleep00-21swapper/023:23:330
2774299244,16cyclictest19720-21aten_r4power_vo00:45:121
27742992416,5cyclictest22-21ksoftirqd/119:52:421
27742992414,6cyclictest9728-21ls22:50:291
27742992414,6cyclictest31656-21cut22:25:111
27742992414,6cyclictest2387-21ls00:00:011
2774199241,5cyclictest15480-21chrt21:40:240
27741992414,6cyclictest6452-21hostname00:10:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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