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2026-08-22 - 14:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #5

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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  Eltec
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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack3slot5s.osadl.org (updated Sat Aug 22, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1898521660sleep1121650irq/29-eth0_g0_10:02:201
1211070ksoftirqd/1121750irq/30-eth0_g0_07:56:351
121900ksoftirqd/1121750irq/30-eth0_g0_12:07:131
121750ksoftirqd/1121750irq/30-eth0_g0_07:46:351
89872730sleep1121750irq/30-eth0_g0_09:21:441
201562610sleep1121750irq/30-eth0_g0_10:06:441
312712580sleep0121750irq/30-eth0_g0_10:52:520
312712580sleep0121750irq/30-eth0_g0_10:52:520
121580ksoftirqd/133092sleep011:11:390
76952500sleep0121750irq/30-eth0_g0_11:31:060
121500ksoftirqd/1121650irq/29-eth0_g0_09:44:101
121500ksoftirqd/1121650irq/29-eth0_g0_09:44:101
121470ksoftirqd/1121750irq/30-eth0_g0_11:32:051
137052460sleep1121750irq/30-eth0_g0_11:54:491
121460ksoftirqd/1121750irq/30-eth0_g0_11:10:551
121460ksoftirqd/1121750irq/30-eth0_g0_09:36:461
121460ksoftirqd/1121650irq/29-eth0_g0_10:38:580
89272450sleep0121750irq/30-eth0_g0_11:36:090
121650450irq/29-eth0_g0_7226-21unixbench_singl07:01:410
121650450irq/29-eth0_g0_16212-21proc_pri09:51:400
121450ksoftirqd/1121750irq/30-eth0_g0_11:52:180
121750440irq/30-eth0_g0_1219-21kworker/1:212:19:331
121750440irq/30-eth0_g0_0-21swapper/107:11:341
121650440irq/29-eth0_g0_6586-21unixbench_multi09:11:430
121650440irq/29-eth0_g0_18266-21unixbench_multi12:11:420
121440ksoftirqd/1121650irq/29-eth0_g0_11:20:070
121750430irq/30-eth0_g0_63732sleep109:11:391
121750430irq/30-eth0_g0_1219-21kworker/1:212:34:561
121750430irq/30-eth0_g0_1219-21kworker/1:210:28:031
121430ksoftirqd/1121650irq/29-eth0_g0_10:57:260
121750420irq/30-eth0_g0_7685-21munin-plugin-st07:06:201
121750420irq/30-eth0_g0_1219-21kworker/1:211:05:051
121650420irq/29-eth0_g0_31ksoftirqd/012:16:360
121650420irq/29-eth0_g0_13-21kworker/0:112:29:350
121420ksoftirqd/1121750irq/30-eth0_g0_10:57:331
121420ksoftirqd/1121650irq/29-eth0_g0_11:19:141
121420ksoftirqd/1121650irq/29-eth0_g0_10:36:371
769299411cyclictest341-21awk08:46:421
154242410sleep0121650irq/29-eth0_g0_09:48:390
121750410irq/30-eth0_g0_1219-21kworker/1:211:37:441
121650410irq/29-eth0_g0_31ksoftirqd/012:21:340
121650410irq/29-eth0_g0_13-21kworker/0:111:48:160
121650410irq/29-eth0_g0_121ksoftirqd/109:40:480
121410ksoftirqd/1121750irq/30-eth0_g0_12:32:240
121410ksoftirqd/1121650irq/29-eth0_g0_10:20:590
769299401cyclictest157322sleep112:01:421
769299401cyclictest11010-21df_inode09:31:331
121750400irq/30-eth0_g0_4636-21diskmemload12:23:511
121750400irq/30-eth0_g0_121ksoftirqd/111:30:161
121650400irq/29-eth0_g0_13-21kworker/0:109:27:230
121650400irq/29-eth0_g0_121ksoftirqd/111:38:320
7692993929cyclictest14365-21proc_pri07:31:411
769299391cyclictest10234-21egrep07:16:331
121750390irq/30-eth0_g0_1219-21kworker/1:211:41:231
121750390irq/30-eth0_g0_1219-21kworker/1:209:20:271
121750390irq/30-eth0_g0_121ksoftirqd/111:22:381
121750390irq/30-eth0_g0_121ksoftirqd/110:49:351
121750390irq/30-eth0_g0_121ksoftirqd/110:21:511
121750390irq/30-eth0_g0_0-21swapper/110:32:211
121650390irq/29-eth0_g0_31ksoftirqd/011:06:450
121650390irq/29-eth0_g0_31ksoftirqd/009:56:250
121650390irq/29-eth0_g0_31ksoftirqd/007:41:220
121650390irq/29-eth0_g0_31ksoftirqd/007:41:220
121650390irq/29-eth0_g0_26678-21mailstats08:21:420
121650390irq/29-eth0_g0_21393-21/usr/sbin/munin08:01:350
121650390irq/29-eth0_g0_20244-21irqstats07:56:360
121650390irq/29-eth0_g0_1964-21runrttasks08:46:550
121650390irq/29-eth0_g0_14484-21timerandwakeup07:31:430
121650390irq/29-eth0_g0_13-21kworker/0:110:47:540
121650390irq/29-eth0_g0_13-21kworker/0:110:34:170
121650390irq/29-eth0_g0_13-21kworker/0:110:11:390
121650390irq/29-eth0_g0_13-21kworker/0:109:41:450
121650390irq/29-eth0_g0_13-21kworker/0:109:41:450
769299386cyclictest2109-21lldpd08:35:241
769299381cyclictest28716-21/usr/sbin/munin10:41:451
769299381cyclictest22985-21sendmail_mailqu08:06:401
769299381cyclictest17032-21grep07:41:421
121750380irq/30-eth0_g0_2682-21ntpq08:56:391
121750380irq/30-eth0_g0_14723-21if_eth009:46:341
121750380irq/30-eth0_g0_13-21kworker/0:109:31:350
121750380irq/30-eth0_g0_1219-21kworker/1:211:15:391
121750380irq/30-eth0_g0_1219-21kworker/1:210:17:401
121750380irq/30-eth0_g0_121ksoftirqd/111:59:501
121650380irq/29-eth0_g0_9542-21find07:11:410
121650380irq/29-eth0_g0_2820-21fgrep08:56:410
121650380irq/29-eth0_g0_2093-21snmpd10:04:160
121650380irq/29-eth0_g0_1964-21runrttasks10:26:400
121650380irq/29-eth0_g0_16617-21irqstats12:06:350
121650380irq/29-eth0_g0_1590-21latency_hist11:06:210
121650380irq/29-eth0_g0_13-21kworker/0:111:24:500
121650380irq/29-eth0_g0_13-21kworker/0:109:22:180
121650380irq/29-eth0_g0_121ksoftirqd/112:12:431
121650380irq/29-eth0_g0_10786-21taskset11:41:410
121380ksoftirqd/1121650irq/29-eth0_g0_09:07:030
121380ksoftirqd/1121650irq/29-eth0_g0_09:07:030
7692993722cyclictest11781-21missed_timers07:21:361
7692993722cyclictest11781-21missed_timers07:21:361
769299372cyclictest8455-21unixbench_singl07:06:411
769299372cyclictest21869-21sed08:01:451
769299371cyclictest4163-21grep09:01:431
769299371cyclictest31121-21grep10:51:431
769299371cyclictest31121-21grep10:51:431
769299371cyclictest16134-21ntp_kernel_pll_09:51:381
769299371cyclictest103022sleep109:26:441
121750370irq/30-eth0_g0_1219-21kworker/1:211:49:261
121750370irq/30-eth0_g0_121ksoftirqd/109:56:311
121750370irq/30-eth0_g0_0-21swapper/112:26:421
121750370irq/30-eth0_g0_0-21swapper/109:07:371
121750370irq/30-eth0_g0_0-21swapper/109:07:371
121650370irq/29-eth0_g0_25418-21ps08:16:410
121650370irq/29-eth0_g0_1964-21runrttasks09:02:490
121650370irq/29-eth0_g0_13-21kworker/0:112:02:110
121650370irq/29-eth0_g0_13-21kworker/0:111:58:510
121650370irq/29-eth0_g0_13-21kworker/0:110:43:230
121650370irq/29-eth0_g0_13-21kworker/0:110:24:430
121650370irq/29-eth0_g0_13-21kworker/0:110:06:400
121650370irq/29-eth0_g0_12808-21sed07:26:330
769299362cyclictest2252-21latency_hist08:56:211
769299362cyclictest19322-21fgrep07:51:411
769299362cyclictest19322-21fgrep07:51:411
769299361cyclictest30068-21cat08:36:361
769299361cyclictest21119-21grep10:11:421
121750360irq/30-eth0_g0_0-21swapper/108:31:211
121650360irq/29-eth0_g0_7612-21seq09:16:400
121650360irq/29-eth0_g0_30104-21grep08:36:370
121650360irq/29-eth0_g0_1964-21runrttasks07:23:250
121650360irq/29-eth0_g0_1964-21runrttasks07:23:250
121650360irq/29-eth0_g0_17888-21missed_timers07:46:360
7692993520cyclictest27320-21grep08:26:211
769299351cyclictest25496-21cat08:16:421
121750350irq/30-eth0_g0_24307-21unixbench_multi08:11:420
121650350irq/29-eth0_g0_22911-21proc_pri08:06:390
121650350irq/29-eth0_g0_1964-21runrttasks08:44:180
121650350irq/29-eth0_g0_19383-21cat07:51:420
121650350irq/29-eth0_g0_19383-21cat07:51:420
121650350irq/29-eth0_g0_1718-21sed08:51:430
121650350irq/29-eth0_g0_10438-21if_eth007:16:360
769299341cyclictest0-21swapper/108:46:211
769299341cyclictest0-21swapper/108:11:391
121650340irq/29-eth0_g0_29709-21sh08:36:200
121650340irq/29-eth0_g0_27743-21ntp_offset08:26:380
7692993317cyclictest13336-21unixbench_multi07:26:421
121750330irq/30-eth0_g0_15795-21unixbench_singl07:36:441
121750330irq/30-eth0_g0_15795-21unixbench_singl07:36:441
121650330irq/29-eth0_g0_8340-21mailstats07:06:400
121650330irq/29-eth0_g0_16474-21df07:41:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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