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2026-08-19 - 22:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Wed Aug 19, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2963721330,2sleep00-21swapper/010:24:000
2963721330,2sleep00-21swapper/010:24:000
1511621230,3sleep0201rcuc/008:18:540
359621170,4sleep00-21swapper/010:39:110
31782640,3sleep30-21swapper/310:39:063
42502620,3chrt0-21swapper/009:14:130
42502620,3chrt0-21swapper/009:14:130
264072600,3chrt0-21swapper/308:48:563
199192590,3sleep30-21swapper/311:24:053
199192590,3sleep30-21swapper/311:24:053
23725995733,22cyclictest1939-21latency_hist07:43:530
23725995733,22cyclictest1939-21latency_hist07:43:530
125732550,2sleep30-21swapper/308:09:163
319742530,3sleep30-21swapper/309:03:553
319742530,3sleep30-21swapper/309:03:553
42302500,3chrt0-21swapper/012:09:040
4102490,4chrt0-21swapper/211:59:052
4102490,4chrt0-21swapper/211:59:052
127472460,6sleep012750-21unixbench_multi08:09:170
23725994317,24cyclictest31913-21sh09:03:530
23725994317,24cyclictest31913-21sh09:03:530
32352420,3sleep30-21swapper/312:04:173
32352420,3sleep30-21swapper/312:04:173
151432410,3chrt0-21swapper/309:44:073
279552400,2chrt27949-21gzip11:44:120
23725994019,18cyclictest0-21swapper/008:44:070
23725994015,22cyclictest16877-21cut09:49:080
23725994014,24cyclictest0-21swapper/008:49:160
23725993914,23cyclictest11569-21sort09:34:090
23725993914,23cyclictest11569-21sort09:34:090
2372599391,12cyclictest32654-21awk11:58:530
155882390,4sleep20-21swapper/209:44:142
117372390,2sleep111739-21ntp_kernel_pll_09:34:121
117372390,2sleep111739-21ntp_kernel_pll_09:34:121
75042380,3sleep00-21swapper/007:58:070
75042380,3sleep00-21swapper/007:58:070
23726993829,7cyclictest10914-21kernelversion10:59:101
23726993829,7cyclictest10914-21kernelversion10:59:101
2372599381,13cyclictest8169-21tune2fs12:19:080
2372599381,13cyclictest8169-21tune2fs12:19:080
2372599381,13cyclictest8169-21tune2fs12:19:080
2372599381,13cyclictest32425-21tune2fs09:04:060
2372599381,13cyclictest2295-21latency_hist12:04:020
2372599381,13cyclictest2295-21latency_hist12:04:020
2372599381,12cyclictest20341-21munin-node10:04:040
111712380,3sleep30-21swapper/309:34:063
111712380,3sleep30-21swapper/309:34:063
66872370,3sleep30-21swapper/307:54:123
66872370,3sleep30-21swapper/307:54:123
2372599372,11cyclictest23755-21ls08:39:150
2372599372,11cyclictest23755-21ls08:39:150
23725993719,16cyclictest0-21swapper/009:54:060
23725993719,16cyclictest0-21swapper/009:54:060
2372599371,12cyclictest4256-21fschecks_time07:49:060
2372599371,12cyclictest25982-21/usr/sbin/munin10:14:080
2372599371,12cyclictest25982-21/usr/sbin/munin10:14:080
2372599371,11cyclictest15471-21/usr/sbin/munin12:39:070
2372599371,11cyclictest15471-21/usr/sbin/munin12:39:070
2372599371,10cyclictest749-21runrttasks08:28:510
57492360,4sleep20-21swapper/210:44:162
2372599367,7cyclictest729-21dbus-daemon08:23:530
2372599367,7cyclictest729-21dbus-daemon08:23:530
2372599364,11cyclictest7799-21sort07:59:040
2372599364,11cyclictest7799-21sort07:59:040
23725993615,19cyclictest0-21swapper/010:49:110
23725993615,19cyclictest0-21swapper/010:49:110
23725993614,19cyclictest0-21swapper/008:54:150
2372599361,12cyclictest749-21runrttasks10:13:180
2372599361,12cyclictest749-21runrttasks10:13:180
2372599361,11cyclictest4917-21sort10:44:060
2372599361,11cyclictest2331-21/usr/sbin/munin12:04:170
2372599361,11cyclictest2331-21/usr/sbin/munin12:04:170
2372599361,10cyclictest19877-21cut08:29:150
2372599361,10cyclictest19877-21cut08:29:150
23725993610,24cyclictest0-21swapper/010:29:080
23725993610,24cyclictest0-21swapper/010:29:080
179792360,3sleep20-21swapper/211:19:052
179792360,3sleep20-21swapper/211:19:052
23726993529,4cyclictest29492-21latency_hist10:23:531
23726993529,4cyclictest29492-21latency_hist10:23:531
23725993513,20cyclictest0-21swapper/011:49:040
2372599351,15cyclictest601-21snmpd11:21:420
2372599351,15cyclictest601-21snmpd11:21:420
2372599351,12cyclictest9182-21missed_timers10:54:090
2372599351,12cyclictest9182-21missed_timers10:54:090
2372599351,12cyclictest24209-21needreboot11:34:100
2372599351,12cyclictest24209-21needreboot11:34:100
2372599351,11cyclictest8243-21cat09:24:160
2372599351,11cyclictest8243-21cat09:24:160
2372599351,10cyclictest14818-21missed_timers11:09:090
2372599351,10cyclictest14818-21missed_timers11:09:090
2372599351,10cyclictest10369-21head09:29:170
23725993510,2cyclictest0-21swapper/011:24:050
23725993510,2cyclictest0-21swapper/011:24:050
100182350,3sleep20-21swapper/209:29:162
291152340,2sleep10-21swapper/108:54:131
2372599342,10cyclictest30859-21/usr/sbin/munin07:34:080
2372599341,13cyclictest22559-21cron08:38:530
2372599341,11cyclictest16295-21tune2fs11:14:060
2372599341,11cyclictest16295-21tune2fs11:14:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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