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2026-08-07 - 04:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.
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 100 highest latencies:
System rack2slot7s.osadl.org (updated Fri Aug 07, 2026 00:43:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2314637995442,7cyclictest151ktimers/000:30:550
2314637995139,9cyclictest0-21swapper/000:30:020
2314639994824,5cyclictest171rcu_preempt22:25:542
2314639994824,5cyclictest171rcu_preempt22:25:542
2314637994833,4cyclictest2387474-21systemd-run22:10:010
2314639994736,8cyclictest2366005-21sh21:35:022
2314637994637,6cyclictest2326624-21cut19:50:000
2314637994637,6cyclictest2326624-21cut19:50:000
2314638994538,3cyclictest0-21swapper/100:05:471
2314637994535,5cyclictest151ktimers/019:40:520
2314639994434,7cyclictest2396623-21cron22:25:012
2314638994436,5cyclictest2347652-21latency_hist21:00:021
2314638994423,13cyclictest271ktimers/122:25:541
2314638994423,13cyclictest271ktimers/122:25:541
2314637994436,5cyclictest2438033-21unixbench_singl23:31:040
2314637994436,5cyclictest2438033-21unixbench_singl23:31:040
2314639994335,5cyclictest2427699-21aten_r2power_cu23:15:442
2314639994334,6cyclictest2356781-21idleruntime-cro21:20:012
2314639994334,6cyclictest2335614-21munin-plugin-st20:20:012
2314638994335,5cyclictest2430444-21latency_hist23:20:031
2314638994335,5cyclictest0-21swapper/122:40:011
2314637994335,5cyclictest2434772-21switchtime23:26:040
2314637994335,5cyclictest2434772-21switchtime23:26:040
231463799432,34cyclictest665-21snmpd22:10:520
231463799432,34cyclictest611083-21cups-browsed21:10:520
2314637994310,25cyclictest2416168-21ssh22:55:540
2314637994232,7cyclictest151ktimers/020:11:010
2314637994134,3cyclictest0-21swapper/022:35:570
2314637994127,9cyclictest151ktimers/020:50:540
2314639994030,6cyclictest2433868-21/usr/sbin/munin23:25:442
2314639994030,6cyclictest2433868-21/usr/sbin/munin23:25:442
2314638994033,4cyclictest1-21systemd22:15:021
2314638994032,5cyclictest439-21systemd-logind20:45:011
2314638994030,7cyclictest2350611-21diskmemload00:00:011
2314638994030,7cyclictest2350611-21diskmemload00:00:011
2314637994024,4cyclictest0-21swapper/022:15:510
2314639993933,3cyclictest0-21swapper/200:40:012
2314639993930,5cyclictest611083-21cups-browsed23:57:182
2314639993930,5cyclictest611083-21cups-browsed23:57:182
2314639993929,7cyclictest2418028-21idleruntime-cro23:00:002
2314638993931,5cyclictest2466563-21awk00:20:011
2314638993931,5cyclictest2410475-21timerwakeupswit22:46:071
2314638993931,5cyclictest2410475-21timerwakeupswit22:46:071
2314638993931,5cyclictest2357981-21awk21:21:021
2314637993932,4cyclictest2378251-21latency_hist21:55:020
2314637993931,5cyclictest2384419-21systemd-run22:05:020
2314637993930,6cyclictest151ktimers/020:45:540
2314637993929,6cyclictest2354438-21fschecks_count21:15:440
2314637993927,9cyclictest2397661-21missed_timers22:25:500
2314637993927,9cyclictest2397661-21missed_timers22:25:500
2314639993831,4cyclictest2433267-21ssh23:25:012
2314639993831,4cyclictest2433267-21ssh23:25:012
231463999382,33cyclictest2407030-21ssh22:40:572
2314638993829,6cyclictest2477146-21threads00:36:091
2314637993832,4cyclictest2411935-21ssh22:50:020
2314637993832,4cyclictest2411935-21ssh22:50:020
2314637993831,4cyclictest0-21swapper/021:21:080
2314637993827,7cyclictest421-21dbus-daemon21:39:430
2314637993827,7cyclictest421-21dbus-daemon21:39:430
2314638993731,3cyclictest0-21swapper/121:10:011
2314637993730,5cyclictest2421085-21cron23:05:010
2314639993630,3cyclictest0-21swapper/200:15:022
2314639993629,4cyclictest2424149-21grep23:10:012
2314639993628,5cyclictest2457697-21latency_hist00:05:022
2314639993625,8cyclictest2367722-21sed21:36:042
2314639993625,8cyclictest2367722-21sed21:36:042
231463899363,26cyclictest665-21snmpd22:55:531
2314638993628,5cyclictest2408890-21systemd-run22:45:011
2314638993628,5cyclictest2378977-21fschecks_time21:55:471
2314638993626,6cyclictest1-21systemd21:26:031
2314638993625,8cyclictest2355184-21switchtime21:16:031
2314637993628,5cyclictest12650irq/32-eth000:01:020
231463999353,25cyclictest2437397-21ssh23:30:502
231463999353,25cyclictest2437397-21ssh23:30:502
2314639993525,6cyclictest2385504-21ntp_kernel_err22:05:512
2314638993527,5cyclictest2328104-21cron19:55:001
2314638993527,5cyclictest1002-21mta-sts-daemon20:30:571
2314638993525,7cyclictest2461175-21cpu00:10:421
2314637993529,3cyclictest0-21swapper/022:25:010
2314637993528,3cyclictest0-21swapper/023:10:010
2314637993527,5cyclictest0-21swapper/000:05:530
2314637993525,7cyclictest2443875-21switchtime23:41:040
2314637993523,8cyclictest2453072-21timerwakeupswit23:56:080
2314637993523,8cyclictest2453072-21timerwakeupswit23:56:080
2314637993519,10cyclictest12650irq/32-eth023:35:580
2314637993518,10cyclictest0-21swapper/000:35:570
2314639993427,4cyclictest2427212-21idleruntime-cro23:15:012
2314639993426,5cyclictest2466550-21cut00:20:012
2314639993426,4cyclictest0-21swapper/200:33:022
2314639993422,8cyclictest2446306-21latency23:45:482
2314639993422,7cyclictest2350611-21diskmemload21:10:532
231463999342,23cyclictest2376441-21ssh21:51:022
2314638993427,4cyclictest2331074-21unixbench_singl20:01:061
2314638993427,4cyclictest1001-21mta-sts-daemon23:25:551
2314638993427,4cyclictest1001-21mta-sts-daemon23:25:551
2314638993427,3cyclictest0-21swapper/123:50:011
2314638993425,6cyclictest487-21rs:main1
2314638993423,8cyclictest2473536-21latency00:30:501
231463799346,23cyclictest12650irq/32-eth000:20:530
2314637993424,8cyclictest2427232-21ssh23:15:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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