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2026-05-18 - 08:38

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 376 highest latencies:
System rack9slot4s (updated Mon May 18, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63779911661127,26cyclictest7013-21hddtemp_smartct19:25:170
63789910911069,18cyclictest6868-21tune2fs19:25:161
59572638590,32sleep00-21swapper/019:21:100
63002616571,30sleep10-21swapper/119:24:471
6377994014,14cyclictest3330-21df_inode20:40:140
157552381,33sleep115788-21df_inode00:05:141
6378993621,11cyclictest13164-21/usr/sbin/munin19:40:161
6377993616,6cyclictest28496-21munin-run00:40:010
6377993613,11cyclictest0-21swapper/021:20:110
55052361,31sleep15512-21iostat_ios20:45:201
36412361,31sleep13724-21memory20:40:221
6377993516,6cyclictest2431-21munin-run22:05:000
90662341,29sleep19160-21hddtemp_smartct20:55:161
6377993417,5cyclictest20266-21df_inode21:25:130
217852341,29sleep021864-21fschecks_count22:55:150
6377993317,5cyclictest9702-21munin-run23:50:010
6377993314,10cyclictest0-21swapper/000:26:450
262682331,28sleep026326-21switchtime23:05:280
6377993216,5cyclictest5211-21diskstats20:45:160
6377993216,5cyclictest22683-21ntp_states21:30:250
6377993215,6cyclictest7283-21perl20:50:160
6377993215,6cyclictest26090-21perl21:40:170
6377993215,6cyclictest23197-21sendmail_mailtr20:05:290
6377993215,6cyclictest17815-21seq21:18:570
6377993215,5cyclictest3583-21users23:30:290
6377993215,5cyclictest17001-21timerwakeupswit22:40:280
6377993215,5cyclictest10768-21munin-run19:35:000
6377993213,4cyclictest0-21swapper/021:15:000
279182320,9sleep0637799cyclictest20:20:140
138022326,21sleep013917-21latency_hist22:35:000
637799319,18cyclictest2225-21dbus-daemon20:57:050
637799318,7cyclictest11565-21gdbus00:18:420
6377993116,5cyclictest21650-21http_loadtime00:20:180
6377993116,11cyclictest16519-21/usr/sbin/munin00:05:270
6377993115,6cyclictest2620-21aten_r4power_cu22:05:110
6377993115,6cyclictest19811-21taskset19:56:310
6377993115,5cyclictest14674-21runrttasks19:45:020
6377993115,5cyclictest12555-21ntp_states23:55:240
637799311,12cyclictest12913-21aten_r4power_vo19:40:120
6377993110,13cyclictest0-21swapper/023:13:590
306582312,3sleep130806-21cstates00:45:131
79092301,5sleep10-21swapper/122:17:301
6378993015,10cyclictest27919-21/usr/sbin/munin20:20:141
6377993015,5cyclictest11564-21packagekitd00:11:310
6377993015,4cyclictest0-21swapper/000:00:250
6377993015,4cyclictest0-21swapper/000:00:240
6377993014,6cyclictest30472-21grep20:25:210
6377993014,5cyclictest31706-21basename20:30:130
6377993014,5cyclictest24005-21tr23:00:230
6377993013,6cyclictest31214-21entropy23:20:160
6377993013,6cyclictest29305-21diskstats23:15:150
6377993013,6cyclictest11710-21taskset22:27:460
6377993013,6cyclictest10951-21aten_r4power_en19:35:120
6377993012,9cyclictest0-21swapper/022:50:200
637799301,26cyclictest0-21swapper/021:50:190
637799301,25cyclictest2225-21dbus-daemon21:58:330
6377993011,10cyclictest0-21swapper/021:35:150
43602301,5sleep10-21swapper/122:09:441
324382301,5sleep10-21swapper/123:23:051
290292301,5sleep10-21swapper/121:48:081
271562301,5sleep10-21swapper/121:43:101
187422301,4sleep118903-21perl19:55:161
186142301,25sleep118693-21iostat21:20:201
111622301,4sleep111167-21iostat_ios21:00:211
637899297,18cyclictest0-21swapper/100:50:251
637899293,20cyclictest5155-21iostat_ios22:10:211
6378992910,15cyclictest21631-21cpu22:55:111
637799298,5cyclictest0-21swapper/023:37:070
637799295,20cyclictest4634-21aten_r4power_po22:10:120
637799295,19cyclictest30670-21aten_r4power_vo00:45:120
6377992914,5cyclictest32447-21taskset00:50:020
6377992914,5cyclictest25458-21if_eth000:30:200
6377992913,6cyclictest0-21swapper/020:10:510
6377992913,5cyclictest7495-21taskset23:41:460
6377992913,5cyclictest13020-21awk21:05:200
637799291,24cyclictest0-21swapper/000:40:110
6377992911,8cyclictest0-21swapper/022:15:240
285322291,5sleep10-21swapper/123:11:471
274472291,5sleep00-21swapper/020:17:410
268352291,5sleep10-21swapper/123:08:371
253032291,5sleep10-21swapper/121:38:371
243712291,4sleep124378-21diskstats20:10:141
237392291,5sleep10-21swapper/120:08:071
179442291,5sleep00-21swapper/019:51:350
176442291,5sleep10-21swapper/121:17:081
122282291,5sleep00-21swapper/021:04:280
112672291,6sleep10-21swapper/123:51:581
109132291,24sleep110953-21/usr/sbin/munin19:35:111
6842281,5sleep10-21swapper/120:33:121
6378992810,14cyclictest6128-21cut23:40:101
6377992813,5cyclictest28336-21ntpq21:45:280
6377992812,8cyclictest0-21swapper/023:25:270
6377992810,9cyclictest0-21swapper/022:20:250
310092281,5sleep10-21swapper/121:54:131
275022281,5sleep10-21swapper/120:18:141
248852281,5sleep10-21swapper/100:30:031
24222281,5sleep00-21swapper/020:36:290
226802281,5sleep10-21swapper/100:23:091
218812281,5sleep10-21swapper/120:03:181
217622281,5sleep00-21swapper/020:02:020
192462281,5sleep10-21swapper/100:15:071
190972281,5sleep10-21swapper/122:46:211
177152281,5sleep00-21swapper/022:45:020
172152281,5sleep10-21swapper/122:41:171
160442281,5sleep10-21swapper/119:46:211
154452281,5sleep10-21swapper/122:37:351
150872281,5sleep10-21swapper/100:02:271
150872281,5sleep10-21swapper/100:02:261
131572281,5sleep10-21swapper/123:57:031
113682281,5sleep00-21swapper/023:53:000
637899274,17cyclictest19910-21diskstats22:50:151
6378992715,7cyclictest8273-21diskstats23:45:171
637899271,13cyclictest9037-21/usr/sbin/munin19:30:281
6377992712,4cyclictest15552-21taskset22:38:420
54842271,5sleep10-21swapper/123:35:381
325422271,5sleep10-21swapper/121:55:431
313292271,5sleep10-21swapper/120:28:521
280532271,5sleep10-21swapper/100:35:341
25952271,5sleep10-21swapper/120:38:121
179312271,5sleep10-21swapper/119:51:281
156272271,5sleep10-21swapper/121:10:441
139242271,5sleep10-21swapper/121:07:351
99412261,5sleep10-21swapper/122:23:551
637899266,15cyclictest0-21swapper/123:15:291
637899262,11cyclictest0-21swapper/123:30:181
6378992617,6cyclictest29597-21awk00:40:271
6378992616,6cyclictest22336-21grep21:30:171
637899253,17cyclictest23984-21iostat_ios23:00:211
6378992510,12cyclictest0-21swapper/122:00:241
247102251,5sleep10-21swapper/100:29:491
19752251,5sleep10-21swapper/123:29:141
135222251,5sleep10-21swapper/122:32:041
637899247,14cyclictest20868-21processes21:25:241
637899243,19cyclictest0-21swapper/100:11:281
6378992415,5cyclictest0-21swapper/120:50:281
637899232,16cyclictest10498-21df22:25:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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