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2026-08-09 - 14:10

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 Sun Aug 09, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24069912551218,22cyclictest2695-21snmpd19:50:211
24069911581149,6cyclictest0-21swapper/119:25:091
20352577533,29sleep10-21swapper/119:21:501
20252488440,32sleep00-21swapper/019:21:430
240599186168,14cyclictest0-21swapper/019:25:090
232672810,5sleep123270-21aten_r4power_cu23:10:111
2405995814,6cyclictest13280-21iostat_ios19:50:210
19402450,22sleep03-21ksoftirqd/020:45:280
2406994023,6cyclictest22-21ksoftirqd/123:21:141
2406993821,6cyclictest22-21ksoftirqd/120:07:081
2406993720,6cyclictest22-21ksoftirqd/122:41:151
2406993619,6cyclictest22-21ksoftirqd/100:03:451
2406993617,6cyclictest22-21ksoftirqd/100:13:451
2406993520,6cyclictest22-21ksoftirqd/122:22:571
2406993520,5cyclictest22-21ksoftirqd/100:43:241
2406993519,6cyclictest22-21ksoftirqd/123:51:551
2406993519,5cyclictest22-21ksoftirqd/100:19:091
240599355,4cyclictest81rcu_preempt00:28:490
240699346,25cyclictest18215-21iostat_ios22:55:201
240699342,10cyclictest3286-21runrttasks22:07:371
2406993419,5cyclictest22-21ksoftirqd/120:36:171
2406993418,6cyclictest22-21ksoftirqd/120:40:531
2406993418,6cyclictest22-21ksoftirqd/100:21:291
2406993418,5cyclictest22-21ksoftirqd/122:35:141
2406993418,5cyclictest22-21ksoftirqd/119:56:201
57562331,28sleep15839-21memory19:30:201
240699333,11cyclictest17828-21turbostat.cron21:30:001
240699333,10cyclictest26883-21watchsnmpd23:20:011
2406993316,6cyclictest22-21ksoftirqd/120:32:181
2406993316,4cyclictest7476-21fschecks_time19:35:171
240699331,13cyclictest0-21swapper/122:30:001
179862331,5sleep10-21swapper/120:03:091
152422332,27sleep10-21swapper/122:46:311
13602331,4sleep11411-21hddtemp_smartct20:45:191
253102321,5sleep10-21swapper/120:21:031
240699324,25cyclictest5290-21smartctl20:55:181
2406993218,5cyclictest22-21ksoftirqd/120:10:511
2406993218,5cyclictest22-21ksoftirqd/120:10:511
2406993216,6cyclictest22-21ksoftirqd/121:03:431
2406993215,6cyclictest22-21ksoftirqd/121:21:521
2406993210,6cyclictest22-21ksoftirqd/122:10:301
240599329,11cyclictest8119-21latency_hist22:30:010
240599324,13cyclictest24413-21fschecks_time20:20:160
240599323,4cyclictest81rcu_preempt21:00:160
240599322,26cyclictest3605-21/usr/sbin/munin20:50:220
240599321,5cyclictest5270-21cpu19:30:110
2405993213,6cyclictest26897-21munin-run23:20:000
2405993212,6cyclictest25296-21/usr/sbin/munin00:40:180
2406993124,4cyclictest9431-21smartctl19:40:191
2406993117,4cyclictest22-21ksoftirqd/123:35:131
2406993116,5cyclictest22-21ksoftirqd/122:31:121
2406993115,5cyclictest22-21ksoftirqd/100:37:571
240599317,12cyclictest26238-21fschecks_count20:25:170
240599313,21cyclictest0-21swapper/021:33:010
240599313,18cyclictest0-21swapper/022:09:020
240599312,15cyclictest23905-21/usr/sbin/munin21:45:120
240599311,4cyclictest81rcu_preempt00:15:180
2405993113,5cyclictest32100-21irqstats20:40:200
2405993112,6cyclictest3125-21if_eth022:15:190
2405993111,6cyclictest20529-21python23:00:280
2406993015,5cyclictest22-21ksoftirqd/121:05:031
240699301,13cyclictest9063-21grep23:55:291
240599307,12cyclictest40250irq/92-i91521:35:310
240599303,4cyclictest81rcu_preempt00:37:440
240599303,24cyclictest0-21swapper/022:43:560
240599303,14cyclictest0-21swapper/023:39:530
240599301,6cyclictest2695-21snmpd20:15:250
240599301,4cyclictest81rcu_preempt20:38:310
2405993012,5cyclictest30839-21aten_r4power_en23:30:130
240599301,22cyclictest0-21swapper/021:53:050
230702301,4sleep10-21swapper/121:40:581
121432301,5sleep10-21swapper/121:14:511
291132291,5sleep00-21swapper/020:31:360
285712291,5sleep00-21swapper/023:23:080
281102291,5sleep10-21swapper/100:46:461
258542291,4sleep10-21swapper/120:25:111
251242291,5sleep10-21swapper/121:47:471
240699295,6cyclictest22848-21netstat20:15:251
240699292,13cyclictest0-21swapper/123:00:171
240699291,14cyclictest21715-21latency_hist21:40:001
240599299,6cyclictest9037-21grep23:55:290
2405992919,7cyclictest4214-21aten_r4power_vo23:45:130
2405992919,5cyclictest28966-21wget23:25:100
240599291,5cyclictest81rcu_preempt22:10:180
240599291,4cyclictest81rcu_preempt22:52:200
240599291,20cyclictest0-21swapper/023:52:050
2405992911,5cyclictest23861-21iostat_ios23:10:200
240599291,15cyclictest13280-21/usr/sbin/munin21:15:270
240599291,14cyclictest7475-21seq19:35:170
240599291,14cyclictest20490-21df20:10:140
240599291,14cyclictest20490-21df20:10:130
2405992910,7cyclictest18104-21perl22:55:160
2405992910,6cyclictest14700-21ntp_states22:45:250
232332291,5sleep00-21swapper/021:42:380
226872291,5sleep10-21swapper/100:34:281
129482291,5sleep10-21swapper/100:05:561
61312281,5sleep00-21swapper/020:56:090
54292281,4sleep10-21swapper/123:46:011
324462281,5sleep10-21swapper/123:34:261
303122281,5sleep10-21swapper/123:26:471
282172281,5sleep00-21swapper/000:47:510
268352281,5sleep10-21swapper/121:51:061
240699282,12cyclictest2479-21/usr/sbin/munin22:15:191
240699281,8cyclictest11334-21idleruntime19:45:181
2406992814,5cyclictest22-21ksoftirqd/100:54:011
2406992811,6cyclictest22-21ksoftirqd/123:44:151
240699281,13cyclictest3286-21runrttasks21:32:071
240599289,6cyclictest15241-21python21:20:280
240599285,7cyclictest81rcu_preempt00:10:100
240599283,16cyclictest0-21swapper/019:43:090
240599282,4cyclictest81rcu_preempt22:30:110
240599282,13cyclictest4465-21/usr/sbin/munin22:20:300
240599282,13cyclictest11565-21gdbus00:50:190
2405992818,6cyclictest9747-21unixbench_multi21:05:290
240599281,14cyclictest17055-21seq20:00:230
240599281,13cyclictest21863-21ntp_states00:30:260
240599281,13cyclictest17189-21ls21:25:290
240599280,4cyclictest81rcu_preempt19:57:090
228812281,6sleep00-21swapper/023:07:440
206782281,5sleep10-21swapper/100:28:031
185612281,5sleep00-21swapper/020:05:140
138272281,5sleep10-21swapper/121:17:471
131752281,5sleep00-21swapper/000:08:140
114922281,5sleep00-21swapper/022:36:470
110942281,5sleep00-21swapper/000:01:080
36632271,5sleep00-21swapper/023:42:080
306502271,5sleep00-21swapper/022:01:340
240699273,8cyclictest3203-21diskstats20:50:151
240699271,17cyclictest0-21swapper/121:57:021
187262271,5sleep00-21swapper/000:22:160
174382271,4sleep10-21swapper/122:54:521
121372271,4sleep00-21swapper/019:46:020
240699267,7cyclictest40250irq/92-i91522:00:151
240599263,15cyclictest0-21swapper/021:13:390
240599261,12cyclictest27366-21taskset21:55:030
227922261,4sleep10-21swapper/123:06:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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