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2026-08-05 - 12:56

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 highest latencies:
System rack9slot4s (updated Wed Aug 05, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23289911211098,20cyclictest8229-21kworker/0:219:27:580
21082604558,31sleep10-21swapper/119:23:191
22272598550,32sleep00-21swapper/019:24:330
232999113104,6cyclictest0-21swapper/119:27:571
47592820,4sleep1232999cyclictest20:55:151
163832480,8sleep0232899cyclictest00:15:280
2329994427,13cyclictest6721-21ntp_states23:50:231
232899392,15cyclictest17738-21munin-run21:30:000
232899392,15cyclictest17738-21munin-run21:30:000
2328993825,4cyclictest0-21swapper/022:50:270
2328993813,8cyclictest6904-21df_inode21:00:150
232899381,18cyclictest0-21swapper/019:50:320
48632371,5sleep14901-21fschecks_time19:30:061
2329993718,9cyclictest22-21ksoftirqd/120:47:211
232899372,5cyclictest25881-21fschecks_time21:50:140
2328993723,4cyclictest0-21swapper/020:24:250
2328993713,8cyclictest5412-21memory20:55:240
2328993711,9cyclictest31260-21munin-run20:40:000
2328993711,6cyclictest5580-21hddtemp_smartct19:30:180
251422361,4sleep02225-21dbus-daemon21:48:550
232999368,6cyclictest11565-21gdbus20:06:521
2328993611,7cyclictest11395-21munin-run00:05:010
2328993611,15cyclictest0-21swapper/022:19:380
2328993610,9cyclictest32024-21iostat20:40:220
2328993610,9cyclictest32024-21iostat20:40:210
2328993610,9cyclictest19087-21ntp_states20:05:250
2328993610,17cyclictest0-21swapper/020:34:160
2328993610,16cyclictest0-21swapper/000:22:230
273192350,4sleep0111rcuc/021:55:120
232899357,5cyclictest16568-21tr20:00:130
2328993526,5cyclictest19360-21df_inode00:25:160
2328993526,5cyclictest19360-21df_inode00:25:150
232899352,16cyclictest0-21swapper/019:36:220
232899351,7cyclictest18531-21cut21:30:210
232899351,5cyclictest1123-21taskset20:45:110
2328993512,6cyclictest27220-21iostat00:45:190
232899351,13cyclictest10850-21fschecks_time21:10:170
214782351,30sleep021490-21munin-run21:39:590
232999346,25cyclictest6760-21smartctl22:25:181
232899349,8cyclictest4512-21hddtemp_smartct23:45:180
2328993424,6cyclictest24957-21latency_hist23:15:010
232899341,5cyclictest8368-21/usr/sbin/munin22:30:120
2328993410,15cyclictest0-21swapper/022:22:190
2328993410,15cyclictest0-21swapper/022:00:380
2328993410,15cyclictest0-21swapper/020:18:500
232999332,10cyclictest8784-21df_inode21:05:161
232899336,9cyclictest28375-21runrttasks23:22:000
2328993323,6cyclictest25961-21head00:40:290
2328993323,5cyclictest21919-21grep00:30:270
232899331,12cyclictest2421-21fschecks_count23:40:160
232899331,12cyclictest2421-21fschecks_count23:40:160
2328993311,12cyclictest0-21swapper/020:13:390
2328993310,7cyclictest32746-21ls23:35:150
2328993310,14cyclictest0-21swapper/023:31:300
2328993310,14cyclictest0-21swapper/022:07:170
2328993310,14cyclictest0-21swapper/000:11:280
232999327,8cyclictest28242-21interrupts20:30:191
232999324,9cyclictest23782-21iostat_ios23:10:211
232899329,7cyclictest12200-21df_inode22:40:140
232899324,16cyclictest21307-21/usr/sbin/munin23:05:190
2328993219,5cyclictest0-21swapper/019:55:240
2328993219,5cyclictest0-21swapper/019:55:230
232899321,13cyclictest0-21swapper/021:05:170
2328993211,12cyclictest0-21swapper/023:59:160
2328993211,12cyclictest0-21swapper/021:40:450
232899321,10cyclictest0-21swapper/020:25:190
2328993210,13cyclictest0-21swapper/023:15:320
2328993210,13cyclictest0-21swapper/021:15:070
2328993210,13cyclictest0-21swapper/000:38:310
2328993210,12cyclictest0-21swapper/022:56:010
169302321,5sleep10-21swapper/100:19:111
124092321,8sleep00-21swapper/019:49:390
232999317,5cyclictest40250irq/92-i91520:40:221
232999317,5cyclictest40250irq/92-i91520:40:211
232999314,7cyclictest2389-21/usr/sbin/munin22:15:311
232899312,5cyclictest0-21swapper/023:25:130
232899312,16cyclictest10828-21/usr/sbin/munin22:35:240
232899311,5cyclictest14082-21sshd22:45:160
232899311,10cyclictest7165-21vmstat23:50:300
2328993110,13cyclictest0-21swapper/022:13:000
2328993110,13cyclictest0-21swapper/022:13:000
2328993110,12cyclictest0-21swapper/022:26:270
2328993110,12cyclictest0-21swapper/019:44:170
2328993110,12cyclictest0-21swapper/000:53:130
2328993110,12cyclictest0-21swapper/000:06:360
224372311,5sleep10-21swapper/100:32:461
21462311,4sleep12324-21df23:40:141
21462311,4sleep12324-21df23:40:141
169422311,5sleep10-21swapper/122:50:331
266662301,5sleep10-21swapper/123:18:591
232999309,5cyclictest40250irq/92-i91519:45:211
232999307,5cyclictest40250irq/92-i91500:10:221
2329993015,11cyclictest26824-21sed20:25:281
232999301,14cyclictest2695-21snmpd20:01:171
232999301,14cyclictest0-21swapper/122:47:251
2329993011,15cyclictest23391-21latency_hist21:45:001
2329993010,5cyclictest40250irq/92-i91523:31:191
2328993010,11cyclictest0-21swapper/021:21:020
2328993010,11cyclictest0-21swapper/020:51:180
187382301,5sleep10-21swapper/100:23:171
60542291,5sleep10-21swapper/122:24:371
53512291,5sleep10-21swapper/123:46:021
307532291,5sleep10-21swapper/122:03:311
232999299,16cyclictest0-21swapper/123:23:471
232999298,5cyclictest40250irq/92-i91520:35:211
232999297,5cyclictest40250irq/92-i91521:25:101
232999297,5cyclictest40250irq/92-i91521:25:101
232999297,5cyclictest40250irq/92-i91519:40:191
232999296,5cyclictest40250irq/92-i91500:45:301
232999292,8cyclictest14142-21seq21:20:091
232999292,21cyclictest25967-21grep00:40:291
2329992919,6cyclictest25786-21cut21:50:141
232999291,8cyclictest14416-21sed19:55:011
2329992910,4cyclictest200892sleep100:25:301
2329992910,4cyclictest200892sleep100:25:301
2328992911,5cyclictest0-21swapper/023:00:080
192462291,5sleep10-21swapper/121:31:151
110102291,6sleep10-21swapper/100:01:111
106562291,24sleep110665-21diskstats21:10:151
242132281,5sleep10-21swapper/100:36:451
232999288,5cyclictest40250irq/92-i91522:55:171
232999288,5cyclictest40250irq/92-i91521:15:181
232999288,4cyclictest40250irq/92-i91520:53:051
232999287,5cyclictest40250irq/92-i91522:30:111
232999287,5cyclictest40250irq/92-i91520:10:261
232999287,5cyclictest40250irq/92-i91519:35:291
232999286,5cyclictest40250irq/92-i91523:35:261
232999285,5cyclictest40250irq/92-i91500:05:221
232999284,18cyclictest27585-21diskstats21:55:161
232999282,6cyclictest21851-21/usr/sbin/munin23:05:191
2329992819,5cyclictest22112-21wget20:15:121
2329992814,8cyclictest31663-21iostat_ios22:05:211
232999281,23cyclictest20022-21iostat23:00:201
21552281,5sleep10-21swapper/122:14:281
21552281,5sleep10-21swapper/122:14:271
159672281,5sleep10-21swapper/119:57:381
159672281,5sleep10-21swapper/119:57:381
92722271,5sleep10-21swapper/123:57:491
69472273,6sleep122-21ksoftirqd/121:00:181
232999278,4cyclictest40250irq/92-i91522:40:151
232999278,4cyclictest40250irq/92-i91521:35:231
232999276,5cyclictest40250irq/92-i91520:20:171
232999275,5cyclictest40250irq/92-i91522:35:241
232999272,7cyclictest23832-21diskstats21:45:141
232999271,23cyclictest0-21swapper/123:25:171
232999261,7cyclictest29871-21taskset00:51:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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