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2026-08-07 - 20:20

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 Fri Aug 07, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
104609912461212,24cyclictest21929-21kworker/0:007:25:180
104619910961079,14cyclictest0-21swapper/107:25:151
104619910931069,20cyclictest0-21swapper/110:15:001
86882618518,31sleep00-21swapper/007:20:030
101762573528,30sleep10-21swapper/107:22:371
1046099216192,17cyclictest10737-21latency_hist10:15:010
1889121070,6sleep00-21swapper/010:35:190
180342730,4sleep0111rcuc/007:40:280
10461995223,4cyclictest22-21ksoftirqd/110:15:171
10461995122,4cyclictest22-21ksoftirqd/109:45:131
10461995022,10cyclictest22-21ksoftirqd/109:20:011
10461994916,6cyclictest22-21ksoftirqd/107:45:111
10461994915,6cyclictest22-21ksoftirqd/110:45:071
10461994915,6cyclictest22-21ksoftirqd/109:59:031
10461994815,6cyclictest22-21ksoftirqd/112:40:411
10461994815,6cyclictest22-21ksoftirqd/111:41:291
10461994815,6cyclictest22-21ksoftirqd/111:22:581
10461994815,5cyclictest22-21ksoftirqd/112:10:441
10461994814,6cyclictest22-21ksoftirqd/112:54:531
10461994814,6cyclictest22-21ksoftirqd/110:40:511
10461994814,6cyclictest22-21ksoftirqd/110:06:291
10461994814,6cyclictest22-21ksoftirqd/107:40:101
10461994814,6cyclictest22-21ksoftirqd/107:34:251
10461994814,5cyclictest22-21ksoftirqd/112:04:121
10461994814,5cyclictest22-21ksoftirqd/109:21:351
10461994724,4cyclictest22-21ksoftirqd/108:50:151
10461994720,4cyclictest22-21ksoftirqd/112:19:181
10461994715,5cyclictest22-21ksoftirqd/111:56:091
10461994714,6cyclictest22-21ksoftirqd/111:26:551
10461994714,6cyclictest22-21ksoftirqd/110:50:081
10461994714,6cyclictest22-21ksoftirqd/109:10:371
10461994714,6cyclictest22-21ksoftirqd/107:59:491
10461994714,5cyclictest22-21ksoftirqd/112:46:071
10461994714,5cyclictest22-21ksoftirqd/110:55:591
10461994714,5cyclictest22-21ksoftirqd/110:21:551
10461994714,5cyclictest22-21ksoftirqd/110:03:141
10461994714,5cyclictest22-21ksoftirqd/108:45:481
10461994713,5cyclictest22-21ksoftirqd/111:54:451
10461994713,5cyclictest22-21ksoftirqd/111:49:371
10461994713,5cyclictest22-21ksoftirqd/111:00:271
10461994613,6cyclictest22-21ksoftirqd/107:54:371
10461994613,5cyclictest22-21ksoftirqd/108:05:281
10461994524,4cyclictest22-21ksoftirqd/108:55:261
10461994522,4cyclictest22-21ksoftirqd/110:30:151
10461994514,5cyclictest22-21ksoftirqd/110:29:211
10461994513,5cyclictest22-21ksoftirqd/108:42:051
10461994423,4cyclictest22-21ksoftirqd/110:35:211
10461994422,4cyclictest22-21ksoftirqd/111:35:011
1046199441,5cyclictest2225-21dbus-daemon07:35:141
10461994415,5cyclictest22-21ksoftirqd/112:25:141
10461994415,10cyclictest22-21ksoftirqd/109:25:101
10461994415,10cyclictest22-21ksoftirqd/109:04:081
10461994412,5cyclictest22-21ksoftirqd/112:06:291
10461994322,4cyclictest22-21ksoftirqd/109:40:221
10461994316,8cyclictest22-21ksoftirqd/112:39:291
10461994314,5cyclictest22-21ksoftirqd/109:05:141
300772420,4sleep1211ktimersoftd/112:30:251
242502420,9sleep01046099cyclictest10:50:130
10461994223,4cyclictest22-21ksoftirqd/109:50:221
10461994223,4cyclictest22-21ksoftirqd/108:17:411
10461994221,4cyclictest22-21ksoftirqd/111:15:171
10461994211,4cyclictest22-21ksoftirqd/111:07:391
1046199417,5cyclictest29341-21users09:35:311
10461994122,4cyclictest22-21ksoftirqd/108:12:251
10461994112,6cyclictest22-21ksoftirqd/108:25:161
10461994024,4cyclictest22-21ksoftirqd/111:10:151
10461994024,4cyclictest22-21ksoftirqd/108:20:151
10461994019,10cyclictest22-21ksoftirqd/112:20:131
1046099409,5cyclictest17907-21latency_hist12:00:000
311622390,3sleep0111rcuc/012:35:110
1046199395,6cyclictest22-21ksoftirqd/108:00:491
10461993920,4cyclictest22-21ksoftirqd/108:30:311
1046099391,12cyclictest11643-21unixbench_multi11:40:290
1046199382,5cyclictest5741-21cstates08:35:131
1046199381,6cyclictest22-21ksoftirqd/111:35:111
1046099381,24cyclictest10090-21ntp_states08:45:240
10461993721,4cyclictest22-21ksoftirqd/109:30:261
1046099374,17cyclictest11386-21iostat_ios10:15:210
10460993522,10cyclictest14736-21cron09:00:000
1046099347,4cyclictest81rcu_preempt12:30:210
1046099341,13cyclictest0-21swapper/009:10:360
1046099332,8cyclictest13737-21iostat07:30:200
1046099331,11cyclictest29464-21basename11:04:590
1046099323,4cyclictest81rcu_preempt08:25:030
1046099321,19cyclictest27625-21pidof09:32:000
1046099321,19cyclictest2401-21NetworkManager10:28:050
288592311,5sleep00-21swapper/012:27:440
1046099315,12cyclictest25043-21fschecks_count08:00:140
10460993121,6cyclictest28105-21wget09:35:130
10460993117,8cyclictest20844-21diskstats09:15:130
1046099311,5cyclictest81rcu_preempt08:10:150
86582301,5sleep00-21swapper/010:09:070
268282300,4sleep0111rcuc/008:05:160
242822301,5sleep00-21swapper/007:57:460
1046099307,11cyclictest11565-21gdbus08:36:050
1046099303,14cyclictest25792-21diskstats12:20:150
1046099302,15cyclictest1571-21diskstats09:50:160
10460993012,5cyclictest30209-21irqstats11:05:220
10460993012,5cyclictest23936-21sshd09:22:400
1046099301,15cyclictest4987-21pidof10:00:010
10460993011,5cyclictest4221-21irqstats08:30:210
1046099301,13cyclictest0-21swapper/011:25:250
194932291,5sleep00-21swapper/012:03:050
140742291,5sleep00-21swapper/010:21:380
1046099292,14cyclictest20993-21df_inode07:50:120
1046099292,13cyclictest12913-21iostat11:45:190
1046099291,7cyclictest81rcu_preempt12:46:260
1046099291,5cyclictest81rcu_preempt10:30:120
1046099291,4cyclictest81rcu_preempt12:50:590
1046099291,4cyclictest81rcu_preempt10:00:280
1046099291,3cyclictest81rcu_preempt11:18:180
1046099291,19cyclictest0-21swapper/011:52:510
10460992911,5cyclictest18834-21/usr/sbin/munin07:45:110
10460992911,5cyclictest15415-21hddtemp_smartct09:00:160
1046099291,14cyclictest20508-21diskstats10:40:160
10460992910,15cyclictest89522chrt08:43:290
256122281,5sleep00-21swapper/009:25:360
212242281,5sleep00-21swapper/012:06:360
1046099283,7cyclictest0-21swapper/012:16:350
1046099283,14cyclictest0-21swapper/009:45:260
1046099281,9cyclictest9646-21taskset11:35:280
10460992819,5cyclictest11170-21aten_r4power_cu08:50:110
1046099281,4cyclictest81rcu_preempt11:32:100
1046099281,14cyclictest11565-21gdbus11:10:010
1046099280,3cyclictest81rcu_preempt10:45:100
273092271,5sleep00-21swapper/010:57:340
231332271,4sleep00-21swapper/012:11:570
1046099274,8cyclictest17086-21diskstats09:05:130
1046099273,4cyclictest81rcu_preempt08:15:120
1046099272,3cyclictest81rcu_preempt08:20:480
1046099271,4cyclictest81rcu_preempt09:42:090
1046099271,14cyclictest16599-21seq07:38:120
1046099271,13cyclictest11565-21gdbus12:42:290
1046099261,16cyclictest0-21swapper/011:23:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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