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2026-08-23 - 08:47

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 Sun Aug 23, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
233399912421220,18cyclictest6861-21strings22:55:231
233399911591143,13cyclictest0-21swapper/119:25:121
233389911361089,43cyclictest23532-21aten_r4power_en19:25:110
225942578532,32sleep00-21swapper/019:20:280
230162564518,31sleep10-21swapper/119:22:101
2333899212189,7cyclictest0-21swapper/022:55:220
309542870,3sleep130955-21tail19:40:291
137122820,8sleep12333999cyclictest23:15:111
301842780,4sleep0111rcuc/019:40:150
39002550,7sleep02333899cyclictest00:15:110
291332540,7sleep02333899cyclictest19:35:310
23338994821,6cyclictest3-21ksoftirqd/023:41:290
184252440,6sleep02333899cyclictest23:25:270
293202380,4sleep1211ktimersoftd/121:05:011
299052361,29sleep029921-21wget21:05:190
263932361,3sleep081rcu_preempt20:55:240
23338993520,5cyclictest3-21ksoftirqd/021:14:250
23338993520,5cyclictest3-21ksoftirqd/021:14:240
23338993519,5cyclictest3-21ksoftirqd/020:51:580
23338993518,6cyclictest3-21ksoftirqd/023:35:250
2333899351,22cyclictest3132-21fschecks_time21:20:170
2333899351,21cyclictest4799-21idleruntime-cro20:00:000
2333899351,21cyclictest24529-21grep22:15:290
274752341,29sleep027503-21fschecks_count22:25:150
2333999341,5cyclictest81rcu_preempt00:21:411
2333899349,12cyclictest11976-21latency_hist21:45:010
267842330,2sleep126783-21nfs4_client19:30:221
2333899338,11cyclictest11565-21gdbus23:55:060
2333899332,6cyclictest18854-21needreboot20:35:240
23338993318,5cyclictest3-21ksoftirqd/019:33:080
253662321,4sleep125528-21cstates22:20:121
2333999322,16cyclictest440-21users19:45:291
23339993218,8cyclictest4898-21diskstats21:25:141
2333899322,15cyclictest7927-21df_inode00:25:130
23338993216,5cyclictest3-21ksoftirqd/022:20:380
2333899321,16cyclictest10344-21ntp_states00:30:250
32452311,26sleep13311-21iostat21:20:201
244002311,5sleep10-21swapper/123:41:121
23339993121,6cyclictest16686-21tune2fs20:30:151
23339993117,7cyclictest21820-21diskstats22:10:151
2333999311,18cyclictest3250-21users00:10:311
2333899319,7cyclictest10364-21fschecks_time23:05:180
2333899313,15cyclictest27824-21python23:50:280
2333899312,13cyclictest18069-21diskstats22:00:160
23338993117,4cyclictest3-21ksoftirqd/020:32:510
23338993116,5cyclictest3-21ksoftirqd/022:13:070
23338993112,6cyclictest14829-21ntp_states21:50:230
2333899311,25cyclictest30772-21munin-run22:35:010
23338993110,10cyclictest3-21ksoftirqd/000:12:410
225822311,5sleep10-21swapper/123:37:041
67702301,4sleep16775-21diskstats21:30:151
301562301,5sleep10-21swapper/123:57:321
2333999301,16cyclictest25289-21cut23:45:151
2333899308,11cyclictest11565-21gdbus20:24:010
23338993016,4cyclictest3-21ksoftirqd/023:24:400
23338993014,6cyclictest3-21ksoftirqd/021:15:060
23338993013,6cyclictest3-21ksoftirqd/019:50:220
23338993011,5cyclictest6456-21memory00:20:230
23338993011,5cyclictest11691-21diskstats00:35:160
23338993010,6cyclictest19489-21cut23:30:120
23338993010,16cyclictest149102chrt00:43:590
196632301,5sleep10-21swapper/120:38:311
136552301,5sleep10-21swapper/121:48:051
97782291,5sleep00-21swapper/021:37:030
92632291,5sleep10-21swapper/100:29:051
63312291,5sleep00-21swapper/020:01:390
54782291,5sleep10-21swapper/100:18:591
46372291,5sleep10-21swapper/119:58:431
37672291,5sleep10-21swapper/122:46:521
288332291,5sleep10-21swapper/122:29:271
281442291,5sleep10-21swapper/123:51:051
278332290,5sleep023336-21cyclictest21:00:160
2333999296,4cyclictest81rcu_preempt19:38:251
2333999294,19cyclictest17703-21diskstats23:25:151
2333999292,6cyclictest0-21swapper/122:01:411
2333999292,12cyclictest30772-21munin-run22:35:001
2333999291,4cyclictest81rcu_preempt22:44:361
2333999291,4cyclictest81rcu_preempt22:44:351
2333999291,4cyclictest81rcu_preempt00:51:141
2333899296,11cyclictest8983-21df20:10:130
2333899292,13cyclictest31600-21python00:00:300
2333899292,12cyclictest23114-21unixbench_singl20:45:320
23338992913,6cyclictest3-21ksoftirqd/020:19:110
23338992911,6cyclictest25286-21/usr/sbin/munin23:45:160
23338992911,5cyclictest6824-21/usr/sbin/munin20:05:120
2333899291,15cyclictest31618-21memory22:35:230
23338992911,5cyclictest2564-21df_inode22:45:130
23338992911,5cyclictest16219-21python00:45:280
209702291,5sleep10-21swapper/122:06:011
16072291,5sleep00-21swapper/000:08:530
159972291,5sleep10-21swapper/120:29:241
56682281,5sleep10-21swapper/122:52:071
327572281,5sleep10-21swapper/121:12:261
327572281,5sleep10-21swapper/121:12:261
309832281,5sleep10-21swapper/121:08:341
271372281,5sleep10-21swapper/120:57:541
2333999287,8cyclictest11565-21gdbus23:13:111
2333999287,7cyclictest0-21swapper/123:00:271
2333999286,4cyclictest81rcu_preempt21:18:371
2333999284,18cyclictest10547-21diskstats21:40:161
2333999283,4cyclictest81rcu_preempt20:54:431
2333999281,7cyclictest9522-21ntp_states20:10:241
2333999281,4cyclictest81rcu_preempt23:34:141
23339992810,5cyclictest13456-21sendmail_mailtr20:20:271
23339992810,14cyclictest15886-21hostname21:55:101
2333899289,6cyclictest19944-21diskstats22:05:160
2333899288,6cyclictest12304-21/usr/sbin/munin21:45:110
2333899288,10cyclictest3-21ksoftirqd/023:16:050
23338992814,4cyclictest3-21ksoftirqd/023:14:560
2333899281,13cyclictest15302-21seq20:25:260
2333899281,12cyclictest8169-21runrttasks21:34:470
23338992810,6cyclictest21165-21/usr/sbin/munin20:40:300
232142281,5sleep10-21swapper/120:46:121
18202281,5sleep00-21swapper/022:42:170
18202281,5sleep00-21swapper/022:42:160
158672281,5sleep00-21swapper/021:55:040
113522281,5sleep10-21swapper/123:07:331
97662271,5sleep10-21swapper/121:36:571
25572271,5sleep10-21swapper/119:52:271
2333999275,4cyclictest81rcu_preempt22:15:201
2333999275,4cyclictest81rcu_preempt20:05:101
2333999274,8cyclictest15828-21diskstats23:20:151
2333999273,9cyclictest9808-21df_inode00:30:141
2333999271,22cyclictest31848-21users00:00:311
2333899273,18cyclictest5614-21python21:25:270
2333899272,13cyclictest17657-21/usr/sbin/munin00:50:180
23338992713,4cyclictest81rcu_preempt19:47:120
156112271,5sleep10-21swapper/121:53:581
13032271,5sleep10-21swapper/100:05:481
121472271,5sleep10-21swapper/120:18:341
2333999263,7cyclictest31531-21iostat_ios22:35:211
23339992612,10cyclictest21152-21cat20:40:301
2333899262,21cyclictest0-21swapper/023:02:150
23338992610,5cyclictest5063-21/usr/sbin/munin22:50:260
168702261,5sleep10-21swapper/100:49:341
2333999255,16cyclictest0-21swapper/120:00:261
2333999252,10cyclictest11691-21diskstats00:35:151
2333999242,7cyclictest13664-21tune2fs00:40:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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