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2023-06-08 - 01:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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 
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ARM Freescale i.MX6 Quad @996 MHz, Linux 5.15.26-xenomai (Profile)

Latency plot of shadow in rack #b, slot #7
Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 20 highest latencies:
System rackbslot7s (updated Wed Jun 07, 2023 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
198942138456,1311sleep319896-21ntp_states08:00:063
798263113,603sleep3809-21ntpq12:10:053
20009259768,331sleep220013-21cron11:29:302
789225657,524sleep27926-21ntpq09:05:052
3198248614,343sleep23294-21latency_hist12:19:322
184622441110,170sleep218536-21switchtime07:55:052
28710240243,307sleep228826-21sed08:29:332
28710240243,307sleep228826-21sed08:29:332
4746229111,267sleep24722-21latency_hist12:24:332
1984622767,256sleep219892-21ntpq08:00:052
230922267102,46sleep20-21swapper/209:54:472
16645226548,200sleep216738-21latency_hist09:34:332
21235225547,187sleep221255-21latency_hist09:49:302
14808225269,133sleep214951-21unixbench_multi11:10:132
29747224657,66sleep20-21swapper/211:59:582
2408224646,183sleep22443-21modprobe08:49:312
9060222917,186sleep29070-21modprobe10:54:302
21824222435,90sleep221964-21grep08:05:102
31373221921,183sleep031432-21cat06:55:280
31396220918,85sleep231471-21mailstats10:20:072
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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