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2026-08-09 - 08:03

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 Sun Aug 09, 2026 00:43:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1804707998071,6cyclictest0-21swapper/123:40:431
1804707998071,6cyclictest0-21swapper/123:40:431
1804708995041,6cyclictest1950904-21latency_hist00:10:022
1804708994840,5cyclictest1869905-21timerandwakeup21:56:062
1804708994840,5cyclictest1869905-21timerandwakeup21:56:062
1804708994536,6cyclictest1810714-21systemd-run19:30:012
1804707994336,4cyclictest1883561-21awk22:20:011
1804708994132,5cyclictest1830201-21systemd-run20:35:012
1804708994132,5cyclictest1830201-21systemd-run20:35:012
1804707994134,4cyclictest1002-21mta-sts-daemon21:55:541
1804707994134,4cyclictest1002-21mta-sts-daemon21:55:541
1804707994134,3cyclictest0-21swapper/123:40:011
1804707994134,3cyclictest0-21swapper/123:40:011
1804707994132,5cyclictest1911268-21latency_hist23:05:021
1804708994033,4cyclictest1906701-21grep22:56:052
1804708994031,5cyclictest1842409-21unixbench_multi21:11:062
1804708994029,8cyclictest1862231-21cut21:45:022
1804707994033,4cyclictest1929397-21munin-plugin-st23:35:011
1804707993933,3cyclictest0-21swapper/100:20:011
1804707993933,3cyclictest0-21swapper/100:20:011
1804707993929,7cyclictest1831680-21sendmail20:40:011
1804707993929,7cyclictest1831680-21sendmail20:40:011
1804707993928,8cyclictest1917204-21ssh23:15:011
1804706993933,4cyclictest1788955-21kworker/u8:1-writeback19:55:010
1804706993931,5cyclictest420-21avahi-daemon21:52:140
1804706993924,10cyclictest108580-21cupsd21:36:040
1804708993830,5cyclictest1849933-21ssh21:25:012
1804707993832,2cyclictest0-21swapper/100:00:011
1804707993831,5cyclictest1804705-21cyclictest00:08:261
1804707993829,5cyclictest1828712-21systemd-run20:30:011
1804708993727,8cyclictest1840692-21basename21:10:012
1804707993729,5cyclictest1901895-21systemd-run22:50:011
1804707993728,6cyclictest1815216-21true19:45:011
1804707993727,7cyclictest1846871-21sendmail21:20:011
1804706993733,2cyclictest0-21swapper/020:20:010
1804706993731,4cyclictest1854555-21threads21:31:040
1804706993731,3cyclictest1002-21mta-sts-daemon22:36:530
1804706993730,4cyclictest1932474-21systemd-run23:40:020
1804706993730,4cyclictest1932474-21systemd-run23:40:020
1804706993730,4cyclictest1874428-21cron22:05:000
1804706993729,5cyclictest1-21systemd00:00:010
1804706993725,10cyclictest1812479-21aten_r2power_en19:35:450
1804708993629,3cyclictest0-21swapper/222:36:042
1804708993628,5cyclictest1960191-21latency_hist00:25:022
1804708993628,5cyclictest1960191-21latency_hist00:25:022
1804708993628,5cyclictest1885234-21unixbench-2d22:21:062
180470899360,27cyclictest1854186-21ssh21:30:542
1804707993630,4cyclictest1804705-21cyclictest23:00:011
1804707993628,5cyclictest1898946-21latency_hist22:45:031
1804707993628,3cyclictest0-21swapper/119:40:011
1804707993627,6cyclictest1947761-21cron00:05:011
1804706993631,3cyclictest1809194-21cron19:25:000
1804706993631,3cyclictest1809194-21cron19:25:000
1804706993631,2cyclictest0-21swapper/023:25:450
1804706993629,3cyclictest1000-21mta-sts-daemon00:38:240
1804706993628,5cyclictest1847852-21latency21:20:500
1804706993622,9cyclictest12650irq/32-eth022:20:570
1804708993527,5cyclictest420-21avahi-daemon00:12:172
1804708993527,5cyclictest1874433-21sh22:05:002
1804708993525,7cyclictest265-21systemd-journal22:43:032
1804708993525,6cyclictest108584-21cups-browsed21:15:202
1804708993524,8cyclictest420-21avahi-daemon23:40:082
1804708993524,8cyclictest420-21avahi-daemon23:40:082
1804707993526,6cyclictest1836711-21fschecks_time20:55:471
1804707993526,6cyclictest1836711-21fschecks_time20:55:471
1804707993526,6cyclictest1824205-21systemd-run20:15:011
1804707993526,6cyclictest108584-21cups-browsed23:16:051
1804707993524,8cyclictest1891313-21timerwakeupswit22:31:041
1804707993523,9cyclictest1964409-21/usr/sbin/munin00:31:011
180470799351,27cyclictest1863395-21ssh21:45:541
1804708993428,3cyclictest0-21swapper/200:00:012
1804708993427,4cyclictest1904931-21latency_hist22:55:012
1804708993427,4cyclictest1904931-21latency_hist22:55:012
1804708993426,5cyclictest1821190-21cron20:05:012
180470899341,23cyclictest1863324-21ssh21:45:512
1804707993429,3cyclictest0-21swapper/122:30:011
1804707993425,6cyclictest1-21systemd19:10:011
1804707993425,6cyclictest108584-21cups-browsed23:05:491
1804706993429,3cyclictest1950314-21sshd00:08:260
1804706993428,4cyclictest1917181-21cron23:15:010
1804706993428,4cyclictest1863355-21ntp_kernel_pll_21:45:530
1804706993427,2cyclictest0-21swapper/000:20:020
1804706993427,2cyclictest0-21swapper/000:20:020
1804706993422,9cyclictest0-21swapper/022:26:020
1804708993327,3cyclictest0-21swapper/223:15:552
1804708993326,3cyclictest0-21swapper/200:30:542
1804708993325,5cyclictest108584-21cups-browsed20:35:362
1804708993325,5cyclictest108584-21cups-browsed20:35:362
1804708993325,5cyclictest108584-21cups-browsed19:51:222
1804708993324,6cyclictest1833183-21cron20:45:002
1804708993323,8cyclictest1805591-21ntp_kernel_pll_19:11:002
1804707993325,4cyclictest0-21swapper/100:35:591
1804707993324,7cyclictest1921315-21needreboot23:20:491
1804707993324,6cyclictest1952202-21sendmail_mailst00:11:011
1804707993324,6cyclictest1874428-21cron22:05:001
1804707993324,6cyclictest108580-21cupsd22:11:071
1804707993324,5cyclictest1944774-21cups-browsed00:22:131
1804707993324,5cyclictest1944774-21cups-browsed00:22:131
1804706993328,4cyclictest1804705-21cyclictest19:40:480
1804706993328,3cyclictest1934007-21switchtime23:41:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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