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2025-12-10 - 13:55

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Wed Dec 10, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1480721470sleep0121550irq/30-eth0_g0_11:35:420
1478121340sleep1121450irq/29-eth0_g0_11:35:231
1626821060sleep1121450irq/29-eth0_g0_11:43:301
158612690sleep0121550irq/30-eth0_g0_11:40:190
283452670sleep1121450irq/29-eth0_g0_12:31:371
109962670chrt121550irq/30-eth0_g0_11:20:210
144192640sleep1121550irq/30-eth0_g0_07:10:171
133042620sleep1121450irq/29-eth0_g0_09:19:471
121610ksoftirqd/1121550irq/30-eth0_g0_10:45:531
179312600sleep1121550irq/30-eth0_g0_07:25:131
270262560sleep0121450irq/29-eth0_g0_12:25:310
121550ksoftirqd/1121550irq/30-eth0_g0_10:56:561
305402530sleep0121550irq/30-eth0_g0_10:30:000
121530ksoftirqd/1121450irq/29-eth0_g0_12:06:041
121490ksoftirqd/1121550irq/30-eth0_g0_09:31:441
121450480irq/29-eth0_g0_8599-21chrt11:10:200
121460ksoftirqd/1121450irq/29-eth0_g0_10:37:131
121460ksoftirqd/1121450irq/29-eth0_g0_08:32:281
121450450irq/29-eth0_g0_16821-21missed_timers11:45:150
121450440irq/29-eth0_g0_31ksoftirqd/011:30:090
121440ksoftirqd/1121450irq/29-eth0_g0_11:56:470
121440ksoftirqd/1121450irq/29-eth0_g0_11:56:470
276782430sleep0121550irq/30-eth0_g0_10:16:030
276782430sleep0121550irq/30-eth0_g0_10:16:030
121550430irq/30-eth0_g0_121ksoftirqd/112:20:201
121450430irq/29-eth0_g0_31ksoftirqd/010:22:560
121450430irq/29-eth0_g0_13-21kworker/0:111:50:160
121430ksoftirqd/1121550irq/30-eth0_g0_10:28:560
1393799421cyclictest604-21head08:25:201
1393799421cyclictest12308-21uptime11:25:211
121550420irq/30-eth0_g0_23949-21taskset10:00:231
121550420irq/30-eth0_g0_121ksoftirqd/109:54:521
121450420irq/29-eth0_g0_10877-21munin-run09:09:580
121420ksoftirqd/1121550irq/30-eth0_g0_10:17:271
121420ksoftirqd/1121550irq/30-eth0_g0_10:17:271
121420ksoftirqd/1121450irq/29-eth0_g0_10:04:591
34262410sleep1121450irq/29-eth0_g0_10:50:171
1393799411cyclictest20629-21wc12:00:191
121550410irq/30-eth0_g0_470-21kworker/1:111:05:381
121550410irq/30-eth0_g0_470-21kworker/1:110:31:241
121450410irq/29-eth0_g0_31ksoftirqd/009:49:110
121450410irq/29-eth0_g0_13-21kworker/0:109:55:220
121410ksoftirqd/1121450irq/29-eth0_g0_12:10:201
121410ksoftirqd/1121450irq/29-eth0_g0_11:58:491
121410ksoftirqd/1121450irq/29-eth0_g0_11:58:491
121410ksoftirqd/1121450irq/29-eth0_g0_11:16:011
121410ksoftirqd/1121450irq/29-eth0_g0_09:11:371
121550400irq/30-eth0_g0_17954-21runrttasks09:36:551
121550400irq/30-eth0_g0_121ksoftirqd/112:15:221
121550400irq/30-eth0_g0_121ksoftirqd/109:56:401
121550400irq/30-eth0_g0_121ksoftirqd/109:21:311
121450400irq/29-eth0_g0_6531-21runrttasks11:04:100
121450400irq/29-eth0_g0_3158-21df_abs10:50:110
121450400irq/29-eth0_g0_31ksoftirqd/012:04:320
121450400irq/29-eth0_g0_31ksoftirqd/011:19:580
121450400irq/29-eth0_g0_1984-21runrttasks10:02:220
121450400irq/29-eth0_g0_18282-21sort09:39:590
121450400irq/29-eth0_g0_13488-21grep07:05:250
121450400irq/29-eth0_g0_13-21kworker/0:111:29:200
121450400irq/29-eth0_g0_13-21kworker/0:109:42:410
121400ksoftirqd/1121450irq/29-eth0_g0_11:13:031
121400ksoftirqd/1121450irq/29-eth0_g0_09:44:111
121400ksoftirqd/1121450irq/29-eth0_g0_09:09:581
1393799391cyclictest0-21swapper/107:42:001
1393799391cyclictest0-21swapper/107:42:001
121550390irq/30-eth0_g0_470-21kworker/1:111:52:341
121550390irq/30-eth0_g0_0-21swapper/109:25:271
121450390irq/29-eth0_g0_13-21kworker/0:112:23:340
121450390irq/29-eth0_g0_13-21kworker/0:111:08:290
121450390irq/29-eth0_g0_13-21kworker/0:110:36:320
121450390irq/29-eth0_g0_13-21kworker/0:110:10:100
121450390irq/29-eth0_g0_13-21kworker/0:109:17:320
121450390irq/29-eth0_g0_13-21kworker/0:109:10:020
121450390irq/29-eth0_g0_0-21swapper/008:00:210
121390ksoftirqd/1121450irq/29-eth0_g0_07:24:431
1393799382cyclictest20673-21awk07:35:201
121550380irq/30-eth0_g0_121ksoftirqd/111:24:501
121550380irq/30-eth0_g0_121ksoftirqd/111:03:041
121450380irq/29-eth0_g0_31ksoftirqd/010:44:380
121450380irq/29-eth0_g0_22050-21unixbench_multi12:05:220
121450380irq/29-eth0_g0_1984-21runrttasks07:33:510
121450380irq/29-eth0_g0_1393699cyclictest10:05:240
121450380irq/29-eth0_g0_13-21kworker/0:112:33:130
121450380irq/29-eth0_g0_13-21kworker/0:112:16:370
121450380irq/29-eth0_g0_13-21kworker/0:109:29:170
121450380irq/29-eth0_g0_13-21kworker/0:109:24:280
121450380irq/29-eth0_g0_121ksoftirqd/111:48:041
121450380irq/29-eth0_g0_121ksoftirqd/111:31:081
121450380irq/29-eth0_g0_121ksoftirqd/109:45:121
121450380irq/29-eth0_g0_0-21swapper/007:14:590
1393799372cyclictest240712sleep107:50:141
1393799371cyclictest5594-21vmstat08:45:231
121550370irq/30-eth0_g0_470-21kworker/1:112:39:131
121550370irq/30-eth0_g0_28483-21taskset08:08:281
121550370irq/30-eth0_g0_121ksoftirqd/110:28:291
121550370irq/30-eth0_g0_121ksoftirqd/110:14:251
121550370irq/30-eth0_g0_0-21swapper/110:24:061
121450370irq/29-eth0_g0_6473-21ntp_offset08:50:160
121450370irq/29-eth0_g0_4522-21cat10:55:140
121450370irq/29-eth0_g0_31183-21cpu08:20:100
121450370irq/29-eth0_g0_22076-21sed07:40:230
121450370irq/29-eth0_g0_22076-21sed07:40:230
121450370irq/29-eth0_g0_1984-21runrttasks08:58:310
121450370irq/29-eth0_g0_1984-21runrttasks08:18:110
121450370irq/29-eth0_g0_1984-21runrttasks07:18:260
121450370irq/29-eth0_g0_13469-21unixbench_singl07:05:251
121450370irq/29-eth0_g0_13-21kworker/0:112:36:380
121450370irq/29-eth0_g0_13-21kworker/0:112:10:300
121450370irq/29-eth0_g0_13-21kworker/0:110:45:230
121370ksoftirqd/1121450irq/29-eth0_g0_08:00:061
1393799362cyclictest38982sleep108:40:171
1393799361cyclictest8013-21grep08:55:351
1393799361cyclictest156462sleep107:15:191
121450360irq/29-eth0_g0_4026-21ntp_offset08:40:190
121450360irq/29-eth0_g0_25044-21/usr/sbin/munin07:55:180
121450360irq/29-eth0_g0_20448-21cat07:35:150
121450360irq/29-eth0_g0_1984-21runrttasks09:01:010
121450360irq/29-eth0_g0_1984-21runrttasks08:34:300
121450360irq/29-eth0_g0_17016-21sendmail_mailqu07:20:250
121450360irq/29-eth0_g0_13-21kworker/0:109:52:370
121450360irq/29-eth0_g0_13-21kworker/0:109:33:510
121360ksoftirqd/1121550irq/30-eth0_g0_07:51:520
121360ksoftirqd/1121550irq/30-eth0_g0_07:45:420
13937993523cyclictest19302-21/usr/sbin/munin07:30:181
1393799352cyclictest30237-21wc08:15:161
1393799351cyclictest91482sleep109:00:211
121550350irq/30-eth0_g0_0-21swapper/112:26:381
121450350irq/29-eth0_g0_523-21cat08:25:190
121450350irq/29-eth0_g0_1984-21runrttasks08:48:130
121450350irq/29-eth0_g0_1984-21runrttasks08:11:100
121450350irq/29-eth0_g0_17964-21latency07:25:140
121450350irq/29-eth0_g0_121ksoftirqd/110:40:481
121350ksoftirqd/1121450irq/29-eth0_g0_07:57:491
121350ksoftirqd/1121450irq/29-eth0_g0_07:45:291
1393799341cyclictest28152sleep108:35:171
121550340irq/30-eth0_g0_29628-21runrttasks08:12:321
121450340irq/29-eth0_g0_3071-21grep08:35:210
121450340irq/29-eth0_g0_28665-21cut08:09:590
121340ksoftirqd/16616-21taskset08:50:191
1393799321cyclictest0-21swapper/108:21:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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