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2025-12-10 - 02:06

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 Wed Dec 10, 2025 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2679421290sleep1121450irq/29-eth0_g0_21:14:281
290121080sleep1121550irq/30-eth0_g0_21:49:001
121880ksoftirqd/1121550irq/30-eth0_g0_23:38:241
121770ksoftirqd/1121550irq/30-eth0_g0_23:27:461
121670ksoftirqd/1121550irq/30-eth0_g0_22:17:331
256192660sleep1121550irq/30-eth0_g0_21:09:591
308522610sleep0121450irq/29-eth0_g0_23:41:540
35082520sleep1121450irq/29-eth0_g0_00:03:571
209932510sleep1121450irq/29-eth0_g0_23:01:091
121500ksoftirqd/1121550irq/30-eth0_g0_22:38:451
121450480irq/29-eth0_g0_13-21kworker/0:123:25:160
119062480sleep0121550irq/30-eth0_g0_00:37:040
44802470sleep1121550irq/30-eth0_g0_00:06:011
121450470irq/29-eth0_g0_31ksoftirqd/023:50:160
291972460sleep1121550irq/30-eth0_g0_21:23:551
121550450irq/30-eth0_g0_470-21kworker/1:122:44:591
121450ksoftirqd/1121550irq/30-eth0_g0_22:56:041
121450ksoftirqd/1121450irq/29-eth0_g0_22:30:171
121450ksoftirqd/1121450irq/29-eth0_g0_20:34:491
121550440irq/30-eth0_g0_31ksoftirqd/023:37:240
121450440irq/29-eth0_g0_121ksoftirqd/121:18:430
121440ksoftirqd/1121450irq/29-eth0_g0_22:24:501
121550430irq/30-eth0_g0_121ksoftirqd/123:40:121
121450430irq/29-eth0_g0_132kworker/0:121:55:090
121450430irq/29-eth0_g0_0-21swapper/019:05:220
121430ksoftirqd/1121550irq/30-eth0_g0_00:39:061
121450420irq/29-eth0_g0_13-21kworker/0:121:30:200
2871299412cyclictest31733-21munin-run21:34:591
121550410irq/30-eth0_g0_121ksoftirqd/121:42:281
121550410irq/30-eth0_g0_121ksoftirqd/121:27:161
121450410irq/29-eth0_g0_31ksoftirqd/000:29:450
121450410irq/29-eth0_g0_1984-21runrttasks20:45:520
121450410irq/29-eth0_g0_13-21kworker/0:122:37:550
121450410irq/29-eth0_g0_0-21swapper/022:27:500
121410ksoftirqd/1121450irq/29-eth0_g0_22:51:591
81992400sleep0121450irq/29-eth0_g0_00:21:380
28712994035cyclictest27458-21awk21:15:201
121550400irq/30-eth0_g0_470-21kworker/1:122:06:121
121550400irq/30-eth0_g0_470-21kworker/1:121:59:321
121550400irq/30-eth0_g0_121ksoftirqd/100:22:331
121450400irq/29-eth0_g0_31ksoftirqd/023:23:140
121450400irq/29-eth0_g0_31ksoftirqd/023:16:390
121450400irq/29-eth0_g0_25616-21diskmemload22:30:220
121450400irq/29-eth0_g0_13-21kworker/0:123:02:430
121450400irq/29-eth0_g0_13-21kworker/0:100:11:100
121450400irq/29-eth0_g0_121ksoftirqd/122:54:310
121400ksoftirqd/1121550irq/30-eth0_g0_23:47:380
121400ksoftirqd/1121550irq/30-eth0_g0_23:32:170
121400ksoftirqd/1121550irq/30-eth0_g0_22:47:320
121400ksoftirqd/1121550irq/30-eth0_g0_22:21:390
121400ksoftirqd/1121550irq/30-eth0_g0_21:51:110
121400ksoftirqd/1121550irq/30-eth0_g0_19:41:400
121400ksoftirqd/1121550irq/30-eth0_g0_19:41:400
121400ksoftirqd/1121550irq/30-eth0_g0_19:39:120
121400ksoftirqd/1121550irq/30-eth0_g0_00:06:270
2871299391cyclictest32523-21grep21:35:231
2871299391cyclictest18994-21grep20:40:211
121550390irq/30-eth0_g0_470-21kworker/1:121:53:381
121550390irq/30-eth0_g0_27569-21/usr/sbin/munin19:05:231
121550390irq/30-eth0_g0_121ksoftirqd/123:59:551
121550390irq/30-eth0_g0_121ksoftirqd/100:32:231
121550390irq/30-eth0_g0_0-21swapper/100:27:171
121450390irq/29-eth0_g0_1984-21runrttasks19:55:290
121450390irq/29-eth0_g0_13-21kworker/0:122:13:080
121450390irq/29-eth0_g0_13-21kworker/0:121:49:220
121450390irq/29-eth0_g0_13-21kworker/0:121:24:570
121450390irq/29-eth0_g0_13-21kworker/0:100:00:110
121450390irq/29-eth0_g0_121ksoftirqd/122:40:180
121450390irq/29-eth0_g0_121ksoftirqd/100:18:111
121450390irq/29-eth0_g0_121ksoftirqd/100:18:111
121390ksoftirqd/1121550irq/30-eth0_g0_23:55:010
121390ksoftirqd/1121550irq/30-eth0_g0_23:10:260
121390ksoftirqd/1121550irq/30-eth0_g0_22:55:050
121390ksoftirqd/1121550irq/30-eth0_g0_22:08:290
121390ksoftirqd/1121550irq/30-eth0_g0_22:04:550
121390ksoftirqd/1121550irq/30-eth0_g0_21:36:360
121390ksoftirqd/1121550irq/30-eth0_g0_20:55:180
121390ksoftirqd/1121550irq/30-eth0_g0_20:32:500
121390ksoftirqd/1121550irq/30-eth0_g0_00:18:190
121390ksoftirqd/1121550irq/30-eth0_g0_00:18:190
121390ksoftirqd/1121450irq/29-eth0_g0_22:49:411
2871299381cyclictest17784-21grep20:35:201
121550380irq/30-eth0_g0_470-21kworker/1:123:53:031
121550380irq/30-eth0_g0_470-21kworker/1:123:49:581
121550380irq/30-eth0_g0_470-21kworker/1:123:12:091
121550380irq/30-eth0_g0_470-21kworker/1:122:25:211
121550380irq/30-eth0_g0_470-21kworker/1:100:14:411
121450380irq/29-eth0_g0_1939-21sshd21:26:390
2871299371cyclictest8350-21awk22:10:161
2871299371cyclictest64112sleep122:02:131
2871299371cyclictest21061-21taskset20:50:171
121550370irq/30-eth0_g0_21574-21df_inode23:05:120
121450370irq/29-eth0_g0_26293-21timerandwakeup21:10:220
121450370irq/29-eth0_g0_23831-21taskset21:00:210
121450370irq/29-eth0_g0_18767-21ntp_offset20:40:170
121450370irq/29-eth0_g0_13555-21sed20:20:120
121450370irq/29-eth0_g0_13-21kworker/0:122:17:420
121370ksoftirqd/1121550irq/30-eth0_g0_00:31:150
121370ksoftirqd/1121450irq/29-eth0_g0_19:43:361
121370ksoftirqd/1121450irq/29-eth0_g0_19:43:361
121370ksoftirqd/1121450irq/29-eth0_g0_19:30:191
109172370sleep0121450irq/29-eth0_g0_20:09:400
2871299362cyclictest11643-21cat20:10:231
2871299361cyclictest6065-21munin-run19:49:591
2871299361cyclictest32077-21chrt19:21:371
2871299361cyclictest31154-21cat19:19:591
2871299361cyclictest22169-21grep20:55:141
2871299361cyclictest0-21swapper/123:20:231
121550360irq/30-eth0_g0_470-21kworker/1:123:31:061
121550360irq/30-eth0_g0_470-21kworker/1:123:15:011
121550360irq/30-eth0_g0_470-21kworker/1:123:05:221
121450360irq/29-eth0_g0_1886-21sed19:30:200
121450360irq/29-eth0_g0_17828-21grep20:35:200
121450360irq/29-eth0_g0_15372sleep021:42:360
121450360irq/29-eth0_g0_12277-21cpu20:15:150
121360ksoftirqd/1121450irq/29-eth0_g0_20:15:251
2871299351cyclictest9008-21open_files20:00:201
2871299351cyclictest7912-21sendmail_mailqu19:55:191
2871299351cyclictest137762sleep120:20:151
121450350irq/29-eth0_g0_5258-21missed_timers19:45:150
121450350irq/29-eth0_g0_315-21ls19:25:150
121450350irq/29-eth0_g0_29014-21if_eth019:10:130
121450350irq/29-eth0_g0_2129-21lldpd19:53:410
121450350irq/29-eth0_g0_1984-21runrttasks19:23:050
121450350irq/29-eth0_g0_14948-21runrttasks20:25:160
121450350irq/29-eth0_g0_0-21swapper/020:50:200
2871299341cyclictest6802-21unixbench_multi19:50:211
2871299341cyclictest15369-21unixbench_multi20:25:231
121450340irq/29-eth0_g0_9238-21unixbench_multi20:00:230
121450340irq/29-eth0_g0_30278-21cat19:15:160
121450340irq/29-eth0_g0_24941-21ps21:05:180
121450340irq/29-eth0_g0_0-21swapper/020:10:210
2871299331cyclictest31162sleep119:35:221
2871299331cyclictest0-21swapper/119:13:451
121550330irq/30-eth0_g0_0-21swapper/120:05:181
121450330irq/29-eth0_g0_23658-21/usr/sbin/munin21:00:181
2871299321cyclictest19725-21df_abs20:45:131
121550320irq/30-eth0_g0_0-21swapper/119:25:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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