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2024-04-25 - 09:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #6

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 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 50 highest latencies:
System rackbslot6s.osadl.org (updated Thu Apr 25, 2024 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1861221030,7sleep11245899cyclictest05:39:341
3272591930,3ptp4l241ktimersoftd/100:13:001
146522920,9sleep11245899cyclictest05:32:541
12458997117,18cyclictest14442-21df_inode02:42:241
12458997015,17cyclictest10226-21taskset04:00:261
12458996918,17cyclictest24416-21sh03:37:081
12458996918,17cyclictest24416-21sh03:37:081
12458996916,16cyclictest20254-21ssh03:31:591
12458996713,17cyclictest25515-21snmp_o5powerctl05:02:381
12458996710,20cyclictest8387-21apt-get03:17:121
12458996710,18cyclictest11894-21ssh01:37:501
122152670,8sleep11245899cyclictest04:02:311
110882675,10sleep00-21swapper/000:12:250
12458996618,16cyclictest3804-21taskset03:10:331
12458996618,15cyclictest10038-21sh02:36:491
12458996616,18cyclictest19236-21/usr/sbin/munin02:47:431
12458996610,17cyclictest26947-21date00:57:441
12458996610,17cyclictest26947-21date00:57:441
12458996514,16cyclictest16120-21ssh01:47:381
12458996415,16cyclictest11085-21snmp_o5powerctl05:27:401
12458996413,12cyclictest9135-21ssh05:25:401
12458996412,18cyclictest14551-21users04:47:501
12458996411,31cyclictest25622-21ssh04:21:201
12458996410,17cyclictest28168-21ls05:07:211
12458996315,17cyclictest13401-21taskset02:40:531
12458996311,11cyclictest31752-21ssh03:04:151
12458996310,15cyclictest4731-21ssh04:36:501
12458996217,16cyclictest21037-21taskset04:14:391
12458996216,16cyclictest24186-21taskset02:54:401
12458996216,14cyclictest6037-21taskset05:21:121
12458996213,11cyclictest16974-21ssh04:08:471
12458996212,11cyclictest21858-21ssh03:32:341
12458996211,17cyclictest520-21snmp_o5powerctl02:22:381
12458996210,15cyclictest19857-21mailstats00:37:271
12458996210,12cyclictest28188-21ssh04:23:291
168932610,8sleep01245099cyclictest03:27:170
12458996112,11cyclictest955-21ssh05:13:051
12458996111,11cyclictest23803-21ssh05:01:461
12458996020,17cyclictest9977-21seq01:34:461
12458996020,17cyclictest9977-21seq01:34:461
12458996020,16cyclictest29462-21taskset02:18:141
12458996012,11cyclictest28288-21ssh03:00:091
1245899599,12cyclictest3803-21irqstats02:27:261
12458995915,21cyclictest27331-21diskmemload03:22:101
1245899589,17cyclictest7259-21taskset03:14:331
12458995815,19cyclictest32066-21taskset04:28:411
12458995715,17cyclictest197-21systemd-journal01:55:521
12458995714,12cyclictest11138-21chrt04:44:111
12458995618,15cyclictest2062-21ssh03:49:181
12458995617,15cyclictest5453-21seq01:24:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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