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2026-08-29 - 15:48

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 Sat Aug 29, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
98669912351184,31cyclictest6912-21fschecks_time10:05:181
98669911611139,18cyclictest10036-21wget07:25:111
98659911321096,20cyclictest0-21swapper/007:25:120
97792653606,32sleep00-21swapper/007:24:380
94692563518,30sleep10-21swapper/107:21:231
986599158135,4cyclictest6914-21fschecks_time10:05:180
160092500,9sleep0986599cyclictest11:55:190
172742420,4sleep1201rcuc/109:05:301
178232380,3sleep1201rcuc/107:40:311
986599371,19cyclictest0-21swapper/009:15:130
986599361,22cyclictest17868-21hddtemp_smartct12:00:160
986599353,16cyclictest11044-21hddtemp_smartct08:50:190
986599352,7cyclictest23736-21munin-node09:25:100
9865993524,6cyclictest6030-21date11:30:010
986599351,21cyclictest32071-21chrt12:38:150
986599346,16cyclictest29338-21chrt08:12:520
986599342,20cyclictest18743-21python10:35:300
986599341,21cyclictest5958-21taskset10:01:490
184932341,28sleep00-21swapper/007:45:120
160332341,29sleep12291-21irqbalance07:38:271
986699333,16cyclictest0-21swapper/108:25:141
986599334,15cyclictest14985-21python10:25:280
986599333,15cyclictest1268-21iostat_ios09:50:200
986599332,19cyclictest23415-21/usr/sbin/munin10:50:120
9865993312,8cyclictest0-21swapper/009:05:010
9865993312,6cyclictest17285-21ntp_states07:40:260
9865993310,10cyclictest0-21swapper/011:05:590
218582331,3sleep021898-21/usr/sbin/munin09:20:110
184352331,3sleep118491-21/usr/sbin/munin07:45:121
986699327,21cyclictest0-21swapper/108:50:271
9866993221,6cyclictest14287-21memory11:50:211
986699321,4cyclictest81rcu_preempt09:10:121
986599321,20cyclictest3290-21/usr/sbin/munin09:55:220
233662322,26sleep10-21swapper/109:22:571
986699317,4cyclictest81rcu_preempt11:11:301
986699315,4cyclictest81rcu_preempt12:05:441
986699315,4cyclictest81rcu_preempt08:47:291
986699311,11cyclictest56352timerandwakeup10:00:301
986599319,9cyclictest0-21swapper/007:59:480
986599315,13cyclictest7111-21fschecks_count08:40:170
9865993112,14cyclictest30895-21cron09:43:000
986599311,18cyclictest9195-21processes10:10:260
9865993111,7cyclictest4165-21/usr/sbin/munin12:50:160
986599311,15cyclictest0-21swapper/012:33:330
9865993110,6cyclictest23343-21sed10:50:010
25432311,26sleep12595-21memory12:45:231
189192311,5sleep10-21swapper/112:03:171
11142311,4sleep11161-21hddtemp_smartct09:50:181
986699306,4cyclictest81rcu_preempt08:08:041
986699305,3cyclictest81rcu_preempt08:40:541
986699301,5cyclictest81rcu_preempt10:55:231
986699301,27cyclictest0-21swapper/108:37:101
986699301,11cyclictest239592expr12:15:281
986599308,7cyclictest3306-21diskstats08:30:140
986599307,11cyclictest1886-21runrttasks11:18:320
986599302,14cyclictest6673-21irqstats11:30:200
986599301,4cyclictest81rcu_preempt10:57:040
277752301,25sleep127781-21diskstats09:35:161
25822301,25sleep12678-21/usr/sbin/munin09:55:121
986699299,6cyclictest2225-21dbus-daemon07:30:131
986699295,6cyclictest81rcu_preempt10:25:141
986699295,4cyclictest81rcu_preempt07:51:031
986699295,18cyclictest27077-21diskstats12:25:191
986699293,13cyclictest29483-21perl11:05:161
9866992919,6cyclictest32362-21needreboot08:20:231
986699291,4cyclictest81rcu_preempt10:31:001
986699291,4cyclictest81rcu_preempt09:18:531
9866992911,6cyclictest3286-21runrttasks09:02:511
986599299,16cyclictest26618-21latency_hist12:25:000
986599292,14cyclictest28501-21/usr/sbin/munin09:35:290
986599292,13cyclictest5190-21diskstats08:35:160
9865992920,5cyclictest13068-21cat08:55:210
9865992920,5cyclictest12809-21cat10:20:250
9865992912,5cyclictest20807-21hddtemp_smartct07:50:170
9865992911,6cyclictest13894-21diskstats11:50:140
9865992911,6cyclictest10006-21awk11:40:120
986599291,15cyclictest9715-21/usr/sbin/munin08:45:280
9865992910,6cyclictest27955-21sed12:25:330
9865992910,6cyclictest20225-21irqstats10:40:210
9865992910,5cyclictest29937-21cstates08:15:120
323822291,5sleep00-21swapper/011:12:440
274092291,5sleep00-21swapper/008:07:180
270652291,5sleep00-21swapper/009:32:210
254572291,5sleep10-21swapper/108:01:301
246302291,5sleep00-21swapper/012:19:060
116962291,5sleep00-21swapper/010:17:510
986699284,4cyclictest81rcu_preempt08:33:321
986699284,13cyclictest40250irq/92-i91512:10:281
9866992820,5cyclictest12189-21tune2fs11:45:161
9866992819,5cyclictest31147-21uname12:35:221
986699281,4cyclictest81rcu_preempt09:47:491
986599289,6cyclictest18878-21grep09:10:230
986599289,6cyclictest14757-21df07:35:130
986599288,6cyclictest20327-21grep12:05:270
986599286,11cyclictest16228-21cut09:05:110
986599282,14cyclictest2179-21df_inode12:45:150
986599282,14cyclictest0-21swapper/007:30:130
986599281,4cyclictest81rcu_preempt08:02:510
986599281,24cyclictest111-21usb-storage11:39:380
986599281,13cyclictest27428-21df11:00:150
986599281,13cyclictest16438-21iostat10:30:190
9865992810,6cyclictest1133-21aten_r4power_vo08:25:140
98282281,5sleep10-21swapper/110:13:021
56242281,5sleep10-21swapper/111:27:031
40052281,5sleep10-21swapper/111:24:471
286272281,5sleep10-21swapper/111:02:421
227982281,5sleep10-21swapper/110:45:481
227372281,5sleep00-21swapper/012:14:000
134202281,5sleep10-21swapper/110:21:021
986699278,6cyclictest31435-21idleruntime-cro08:20:001
986699275,4cyclictest81rcu_preempt12:52:201
986699275,4cyclictest81rcu_preempt11:18:501
986699274,4cyclictest81rcu_preempt11:55:531
986699273,18cyclictest23736-21/usr/sbin/munin09:25:311
986699273,18cyclictest18990-21users10:35:331
986699272,4cyclictest81rcu_preempt10:41:591
9866992716,6cyclictest26122-21sed12:20:281
9866992711,5cyclictest40250irq/92-i91509:40:181
986699271,13cyclictest29552-21latency_hist08:15:011
986599279,6cyclictest12536-21/usr/sbin/munin11:45:240
986599272,13cyclictest31854-21irqstats09:45:200
96362271,5sleep10-21swapper/111:39:501
236162271,5sleep10-21swapper/107:57:051
16472271,4sleep10-21swapper/112:44:411
138542271,5sleep10-21swapper/108:57:051
115062271,7sleep10-21swapper/110:15:571
9866992618,5cyclictest24122-21needreboot10:50:241
9866992617,6cyclictest22-21ksoftirqd/111:31:561
986599261,13cyclictest31817-21tr08:20:130
15222261,5sleep00-21swapper/012:43:210
111282261,5sleep10-21swapper/111:40:331
986699256,6cyclictest40250irq/92-i91509:30:171
986699252,9cyclictest29339-21memory12:30:221
9865992514,6cyclictest2448-21cut11:20:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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