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2026-09-02 - 23:49

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 Wed Sep 02, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25309912291203,20cyclictest1957-21smartctl10:10:281
25309911941176,15cyclictest2697-21wget07:25:101
25299911011064,33cyclictest2782-21wget07:25:110
21602669562,32sleep00-21swapper/007:21:550
20562578532,30sleep10-21swapper/107:20:491
252999183160,20cyclictest0-21swapper/010:10:280
292802381,33sleep129305-21wget11:25:111
252999379,13cyclictest2944-21aten_r4power_cu10:15:110
252999371,14cyclictest18531-21sort09:30:130
252999363,27cyclictest27699-21diskstats11:20:140
256162351,30sleep111038-21snmpd09:49:061
252999351,22cyclictest29240-21diskstats12:50:120
252999351,22cyclictest12857-21/usr/sbin/munin10:40:170
252999351,21cyclictest21078-21/usr/sbin/munin08:10:170
47342341,29sleep04835-21users07:30:030
2530993410,5cyclictest23596-21latency_hist11:10:021
252999349,12cyclictest20695-21unixbench_multi12:25:290
2529993425,5cyclictest31582-21cut10:05:110
252999342,20cyclictest18577-21iostat10:55:200
166722341,4sleep116756-21sensors_temp12:15:281
252999333,12cyclictest29997-21wget08:35:120
252999331,21cyclictest0-21swapper/011:54:500
252999331,17cyclictest4548-21wget11:45:090
131622330,22sleep03-21ksoftirqd/007:50:130
316622321,9sleep10-21swapper/108:39:491
283752321,27sleep128384-21df_inode08:30:141
253099327,5cyclictest40250irq/92-i91509:15:211
253099321,7cyclictest28057-21latency_hist08:30:001
252999328,12cyclictest25674-21cpuspeed_turbos11:15:140
252999321,19cyclictest25419-21taskset09:47:040
2529993210,10cyclictest11891-21missed_timers07:45:220
231472321,27sleep123294-21grep09:40:291
185262321,5sleep118530-21cron08:05:001
151912321,4sleep12291-21irqbalance12:10:581
253099314,4cyclictest81rcu_preempt12:33:241
253099312,7cyclictest0-21swapper/109:55:291
2530993121,6cyclictest9405-21cpu07:40:121
2530993112,6cyclictest3286-21runrttasks07:59:441
252999317,12cyclictest24706-21seq12:37:080
252999317,12cyclictest24706-21seq12:37:070
252999311,7cyclictest25733-21sshd08:21:410
2529993116,11cyclictest3116-21latency_hist08:50:000
252999311,5cyclictest81rcu_preempt12:40:120
252999311,4cyclictest81rcu_preempt12:30:270
2529993112,5cyclictest27129-21/usr/sbin/munin12:45:110
2529993111,6cyclictest29618-21seq08:33:030
157222311,5sleep10-21swapper/110:47:451
113032310,4sleep10-21swapper/109:10:161
253099305,4cyclictest81rcu_preempt11:42:591
253099305,4cyclictest81rcu_preempt10:29:061
253099304,4cyclictest81rcu_preempt09:52:481
253099304,19cyclictest24639-21diskstats08:20:161
253099301,4cyclictest81rcu_preempt10:43:031
2530993011,5cyclictest8365-21cpu11:55:121
252999308,4cyclictest12746-21wget09:15:100
252999302,14cyclictest32697-21ntp_states08:40:240
252999302,11cyclictest0-21swapper/012:00:230
252999301,4cyclictest81rcu_preempt09:52:550
252999301,4cyclictest81rcu_preempt09:22:140
2529993013,6cyclictest8333-21tr11:55:110
252999301,26cyclictest8504-21sshd07:35:410
252999301,26cyclictest8504-21sshd07:35:410
2529993011,7cyclictest3812-21/usr/sbin/munin11:40:300
252999301,16cyclictest29659-21fschecks_count11:25:160
2529993011,6cyclictest20313-21chrt08:09:030
252999301,13cyclictest17168-21ls09:25:230
248382301,5sleep10-21swapper/112:38:321
248382301,5sleep10-21swapper/112:38:321
217352301,5sleep10-21swapper/109:38:001
176542301,5sleep10-21swapper/110:53:201
84432291,4sleep10-21swapper/110:30:011
78702291,5sleep10-21swapper/111:53:041
48482291,5sleep10-21swapper/108:53:301
47172291,5sleep00-21swapper/008:52:070
260042291,5sleep10-21swapper/111:15:201
253099298,5cyclictest81rcu_preempt07:35:301
253099298,5cyclictest81rcu_preempt07:35:291
253099295,4cyclictest81rcu_preempt11:21:041
253099295,4cyclictest81rcu_preempt10:04:191
253099293,4cyclictest81rcu_preempt08:42:581
253099292,4cyclictest81rcu_preempt11:13:351
2530992919,6cyclictest26005-21/usr/sbin/munin12:40:251
253099291,15cyclictest1368-21/usr/sbin/munin08:45:101
253099291,15cyclictest13503-21chrt12:07:551
2530992910,4cyclictest40250irq/92-i91507:30:311
252999298,10cyclictest12254-21taskset09:12:080
252999292,14cyclictest15472-21grep10:45:290
252999292,13cyclictest31658-21/usr/sbin/munin11:30:160
252999292,13cyclictest28757-21python09:55:290
2529992911,5cyclictest17136-21fschecks_count08:00:150
2529992911,5cyclictest15752-21ntp_states07:55:250
2529992910,5cyclictest22980-21/usr/sbin/munin09:40:260
252999290,4cyclictest81rcu_preempt10:37:490
252999290,4cyclictest81rcu_preempt09:01:140
197542291,5sleep10-21swapper/109:31:541
178072291,5sleep00-21swapper/010:54:560
106262291,5sleep00-21swapper/007:41:050
101062291,5sleep10-21swapper/112:00:041
64412281,5sleep10-21swapper/108:55:331
61182281,5sleep00-21swapper/010:20:360
325672281,5sleep10-21swapper/111:31:551
253099288,17cyclictest0-21swapper/107:46:421
253099286,4cyclictest40250irq/92-i91508:10:281
253099285,4cyclictest81rcu_preempt12:47:431
253099283,4cyclictest81rcu_preempt10:55:441
253099282,4cyclictest81rcu_preempt11:46:471
2530992812,12cyclictest22-21ksoftirqd/109:03:471
252999282,14cyclictest0-21swapper/012:18:390
252999282,13cyclictest22566-21ntpdc11:05:230
252999282,13cyclictest14176-21/usr/sbin/munin12:10:150
252999282,13cyclictest12822-21ntp_states12:05:240
2529992818,6cyclictest0-21swapper/011:02:520
252999281,23cyclictest8878-21diskstats10:30:160
252999281,15cyclictest5500-21fschecks_count08:55:160
252999281,14cyclictest23032-21iostat08:15:190
252362281,5sleep00-21swapper/011:13:570
239402281,5sleep10-21swapper/108:17:471
23002281,5sleep00-21swapper/011:39:560
192312281,5sleep10-21swapper/112:23:441
191682281,5sleep00-21swapper/012:23:030
19042281,5sleep10-21swapper/111:35:591
179592281,5sleep10-21swapper/109:27:441
106312281,5sleep00-21swapper/009:09:530
103932281,5sleep10-21swapper/109:07:261
6102271,5sleep10-21swapper/110:08:261
267302271,5sleep00-21swapper/008:25:200
253099275,3cyclictest81rcu_preempt09:22:201
253099272,11cyclictest0-21swapper/108:05:171
253099271,9cyclictest2947-21aten_r4power_cu10:15:111
212842271,5sleep10-21swapper/111:01:511
121302271,4sleep10-21swapper/110:39:381
75402261,5sleep00-21swapper/010:25:260
253099268,5cyclictest40250irq/92-i91510:20:231
252999261,4cyclictest81rcu_preempt10:00:170
252999261,13cyclictest21560-21taskset09:36:080
147192268,7sleep122-21ksoftirqd/107:54:381
253099252,11cyclictest0-21swapper/112:25:191
253099251,4cyclictest81rcu_preempt12:52:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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