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2026-07-03 - 05:13

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 Jul 03, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
112469911131080,30cyclictest0-21swapper/019:26:280
108012565517,32sleep10-21swapper/119:20:551
108862562518,29sleep00-21swapper/019:21:460
1124799140131,6cyclictest0-21swapper/119:26:281
91682990,9sleep11124799cyclictest22:09:001
41332800,6sleep11124799cyclictest23:20:231
28732680,3sleep12871-21uname20:25:191
292702660,5sleep00-21swapper/020:10:140
89132640,3sleep1211ktimersoftd/123:35:011
268542560,7sleep11124799cyclictest22:55:171
314322550,9sleep01124699cyclictest21:40:260
105012480,9sleep01124699cyclictest23:37:060
15472410,4sleep1211ktimersoftd/120:20:311
253652401,4sleep125439-21iostat21:25:191
11247993922,5cyclictest20222-21idleruntime-cro00:05:001
69022380,13sleep1211ktimersoftd/122:00:301
288972351,30sleep028903-21/usr/sbin/munin21:35:170
242132351,30sleep124382-21expr00:15:131
11247993524,7cyclictest18340-21/usr/sbin/munin19:40:201
1124799351,9cyclictest27748-21smartctl-wrappe21:30:301
55352341,29sleep15536-21sshd20:31:441
1124799341,5cyclictest81rcu_preempt23:00:251
1124699346,5cyclictest81rcu_preempt22:55:120
1124699341,13cyclictest0-21swapper/022:38:420
217222331,28sleep021728-21diskstats19:50:150
1124799339,4cyclictest18864-21cut22:35:101
1124799337,4cyclictest81rcu_preempt22:35:001
1124699337,14cyclictest2225-21dbus-daemon22:13:070
1124699331,20cyclictest2629-21fschecks_time20:25:140
61142321,27sleep06296-21expr20:35:120
209122321,26sleep120921-21munin-run21:15:001
11247993213,7cyclictest13039-21sendmail22:19:591
1124699327,5cyclictest24683-21cpuspeed_turbos22:50:130
11246993223,6cyclictest21696-21pidof00:06:000
1124699321,19cyclictest13699-21perl22:20:170
261582311,5sleep00-21swapper/021:25:500
1124799319,19cyclictest22-21ksoftirqd/121:02:441
1124799314,20cyclictest2415-21iostat_ios21:50:201
1124799311,4cyclictest81rcu_preempt19:49:031
1124799311,17cyclictest29141-21sort20:10:111
1124699319,12cyclictest25359-21sed00:15:300
1124699317,13cyclictest5900-21cstates22:00:120
1124699315,4cyclictest81rcu_preempt21:30:490
1124699315,13cyclictest773-21unixbench_singl23:10:280
1124699312,17cyclictest0-21swapper/019:45:170
1124699312,15cyclictest13539-21memory23:45:240
1124699311,4cyclictest81rcu_preempt23:02:270
246212301,5sleep00-21swapper/019:55:530
180352301,5sleep00-21swapper/023:57:080
151332301,5sleep00-21swapper/020:58:410
126722301,5sleep10-21swapper/123:44:551
114002301,5sleep10-21swapper/120:48:541
1124799305,13cyclictest40250irq/92-i91522:21:001
11247993012,4cyclictest81rcu_preempt21:45:221
11246993017,8cyclictest32669-21diskstats21:45:150
11246993012,5cyclictest7033-21sh23:30:010
1124699301,24cyclictest16297-21/usr/sbin/munin22:25:280
1124699301,16cyclictest21899-21/usr/sbin/munin21:15:240
1124699301,15cyclictest27730-21cron00:25:010
265212291,5sleep10-21swapper/120:00:551
244862291,5sleep00-21swapper/021:22:560
191012291,5sleep00-21swapper/019:41:580
18672291,5sleep00-21swapper/020:23:440
137182291,5sleep10-21swapper/120:55:111
1124799295,4cyclictest81rcu_preempt00:29:041
1124799295,12cyclictest81rcu_preempt00:49:551
1124799294,9cyclictest31945-21diskstats00:35:151
1124799293,9cyclictest1381-21diskstats00:40:141
1124799293,14cyclictest0-21swapper/122:12:461
11247992923,4cyclictest22-21ksoftirqd/123:10:001
11247992918,7cyclictest29224-21uname21:35:231
11247992918,6cyclictest30859-21wget20:15:091
1124799291,4cyclictest81rcu_preempt19:35:061
11247992914,12cyclictest17262-21latency23:55:221
1124699299,7cyclictest21423-21memory22:40:210
1124699299,5cyclictest7880-21memory23:30:210
1124699291,4cyclictest81rcu_preempt00:14:340
1124699291,20cyclictest0-21swapper/021:57:320
11246992911,5cyclictest14202-21df_inode19:30:140
1124699291,14cyclictest30523-21grep00:30:230
1124699291,12cyclictest0-21swapper/020:53:330
11246992910,7cyclictest17385-21taskset19:38:500
11246992910,6cyclictest31659-21ntp_states20:15:230
111972291,5sleep00-21swapper/020:46:530
104362291,5sleep10-21swapper/123:36:281
91142281,5sleep00-21swapper/022:08:290
67672281,5sleep10-21swapper/123:27:171
4912281,5sleep00-21swapper/000:35:490
314412281,5sleep10-21swapper/100:34:351
294742281,5sleep00-21swapper/000:28:390
29242281,5sleep00-21swapper/023:16:430
258552281,5sleep10-21swapper/122:51:281
228072281,5sleep10-21swapper/119:51:331
220212281,5sleep10-21swapper/100:09:241
188612281,5sleep00-21swapper/021:08:110
160872281,4sleep00-21swapper/023:51:240
126522281,5sleep00-21swapper/022:16:090
125042281,5sleep00-21swapper/023:43:070
1124799285,4cyclictest81rcu_preempt00:54:341
1124799281,5cyclictest0-21swapper/121:57:511
1124799281,14cyclictest27750-21munin-run00:25:001
1124799281,14cyclictest12270-21iostat_ios20:50:201
11247992810,14cyclictest239002chrt22:45:391
1124699282,12cyclictest18985-21hddtemp_smartct00:00:160
11246992811,6cyclictest1827-21aten_r4power_en21:50:110
1124699281,14cyclictest5006-21/usr/sbin/munin20:30:260
1124699281,14cyclictest4716-21sshd00:48:510
11246992810,5cyclictest17557-21iostat22:30:200
58692271,5sleep10-21swapper/120:35:011
283852271,5sleep10-21swapper/120:05:481
250082271,4sleep10-21swapper/119:59:551
226782271,5sleep10-21swapper/121:18:511
1124799275,3cyclictest81rcu_preempt22:40:091
1124799274,4cyclictest81rcu_preempt19:33:461
1124799273,8cyclictest13149-21diskstats23:45:171
1124799273,4cyclictest81rcu_preempt22:26:351
1124799272,12cyclictest0-21swapper/123:51:191
1124699273,6cyclictest28872-21latency_hist20:10:010
11246992717,6cyclictest4111-21ls23:20:210
1124699271,13cyclictest19491-21df_inode21:10:130
11246992710,13cyclictest2225-21dbus-daemon00:43:340
301222261,5sleep00-21swapper/023:05:030
222322261,5sleep10-21swapper/100:10:021
1124799265,4cyclictest81rcu_preempt21:41:341
1124799264,14cyclictest0-21swapper/123:18:321
1124799261,4cyclictest81rcu_preempt21:06:341
1124699269,5cyclictest81rcu_preempt20:04:590
1124699263,17cyclictest16463-21python21:00:290
1124699261,16cyclictest0-21swapper/000:52:040
1124799253,18cyclictest24161-21unixbench_multi21:20:301
1124799251,11cyclictest32576-21if_eth023:10:161
1124799251,10cyclictest81rcu_preempt20:40:291
1124699258,4cyclictest0-21swapper/020:40:170
1124699251,16cyclictest0-21swapper/022:48:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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