* [Xenomai] CyclicTest query on Xenomai
@ 2015-06-26 6:16 Madan Sondur
2015-06-29 5:33 ` Madan Sondur
0 siblings, 1 reply; 8+ messages in thread
From: Madan Sondur @ 2015-06-26 6:16 UTC (permalink / raw)
To: xenomai
Hi ,
I have installed Xenomai 2.6.4 on Ubuntu 12.04 64 bit.
Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015 x86_64
x86_64 x86_64 GNU/Linux
After successfull installation, i am getting varied results with cyclictest
present in /usr/xenomai/bin folder and the one in the rt-tests which i
downloaded.
pi_stress is used in background to stress the system.
Xenomai cyclictest takes a lot of time to complete other threads, where as
the first one completes quickly. This is exactly the opposite if i run the
cyclictest, first thread completes and the test stops.
1) is my observation correct? I may be missing some understanding here.?
2) This is done in Core i7, the difference in latencies with and without
xenomai are noticeable but not significant, Is this correct ?
3) I trying to have Hard real time System with minimal latencies ?
Below are output results.
Can you please help.
------------------------------------------------------------------------------------------------
Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015 x86_64
x86_64 x86_64 GNU/Linux
root@Madan:/usr/xenomai/bin#/home/mymo/MADAN_Xeno/rt-tests/cyclictest -t 21
-p 80 -i 5000 -l 5000
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 0.00 0.01 0.01 1/405 2756
T: 0 ( 2736) P:80 I:5000 C: 5000 Min: 2 Act: 5 Avg: 3
Max: 24
T: 1 ( 2737) P:80 I:5500 C: 4546 Min: 1 Act: 2 Avg: 2
Max: 18
T: 2 ( 2738) P:80 I:6000 C: 4167 Min: 2 Act: 2 Avg: 2
Max: 26
T: 3 ( 2739) P:80 I:6500 C: 3847 Min: 1 Act: 2 Avg: 2
Max: 20
T: 4 ( 2740) P:80 I:7000 C: 3572 Min: 1 Act: 3 Avg: 2
Max: 16
T: 5 ( 2741) P:80 I:7500 C: 3334 Min: 2 Act: 2 Avg: 2
Max: 20
T: 6 ( 2742) P:80 I:8000 C: 3125 Min: 1 Act: 4 Avg: 2
Max: 21
T: 7 ( 2743) P:80 I:8500 C: 2942 Min: 1 Act: 2 Avg: 3
Max: 18
T: 8 ( 2744) P:80 I:9000 C: 2778 Min: 1 Act: 3 Avg: 2
Max: 16
T: 9 ( 2745) P:80 I:9500 C: 2632 Min: 1 Act: 3 Avg: 2
Max: 13
T:10 ( 2746) P:80 I:10000 C: 2500 Min: 2 Act: 3 Avg: 2
Max: 26
T:11 ( 2747) P:80 I:10500 C: 2381 Min: 1 Act: 3 Avg: 2
Max: 14
T:12 ( 2748) P:80 I:11000 C: 2273 Min: 2 Act: 3 Avg: 2
Max: 19
T:13 ( 2749) P:80 I:11500 C: 2174 Min: 2 Act: 3 Avg: 2
Max: 18
T:14 ( 2750) P:80 I:12000 C: 2083 Min: 2 Act: 3 Avg: 2
Max: 13
T:15 ( 2751) P:80 I:12500 C: 2000 Min: 2 Act: 3 Avg: 2
Max: 17
T:16 ( 2752) P:80 I:13000 C: 1923 Min: 2 Act: 3 Avg: 2
Max: 9
T:17 ( 2753) P:80 I:13500 C: 1852 Min: 2 Act: 3 Avg: 3
Max: 17
T:18 ( 2754) P:80 I:14000 C: 1786 Min: 1 Act: 3 Avg: 2
Max: 11
T:19 ( 2755) P:80 I:14500 C: 1724 Min: 2 Act: 3 Avg: 3
Max: 21
T:20 ( 2756) P:80 I:15000 C: 1667 Min: 2 Act: 3 Avg: 2
Max: 8
root@Madan:/usr/xenomai/bin# ./xeno cyclictest -t 21 -p 80 -i 5000 -l 5000
0.01 0.01 0.01 1/410 2708
T: 0 ( 2688) P:80 I: 5000 C: 5000 Min: -2 Act: -2
Avg: 0 Max: 12
T: 1 ( 2689) P:79 I: 505000 C: 120 Min: 0 Act: 7
Avg: 0 Max: 9
T: 2 ( 2690) P:78 I: 1005000 C: 60 Min: 0 Act: 2
Avg: 0 Max: 11
T: 3 ( 2691) P:77 I: 1505000 C: 40 Min: 0 Act: 2
Avg: 0 Max: 13
T: 4 ( 2692) P:76 I: 2005000 C: 30 Min: 0 Act: 0
Avg: 0 Max: 15
T: 5 ( 2693) P:75 I: 2505000 C: 24 Min: 0 Act: 0
Avg: 0 Max: 16
T: 6 ( 2694) P:74 I: 3005000 C: 20 Min: 0 Act: 0
Avg: 0 Max: 19
T: 7 ( 2695) P:73 I: 3505000 C: 18 Min: 0 Act: 0
Avg: 1 Max: 21
T: 8 ( 2696) P:72 I: 4005000 C: 16 Min: 0 Act: 0
Avg: 1 Max: 23
T: 9 ( 2697) P:71 I: 4505000 C: 14 Min: 0 Act: 0
Avg: 2 Max: 24
T:10 ( 2698) P:70 I: 5005000 C: 12 Min: 0 Act: 2
Avg: 2 Max: 26
T:11 ( 2699) P:69 I: 5505000 C: 12 Min: 0 Act: 2
Avg: 2 Max: 28
T:12 ( 2700) P:68 I: 6005000 C: 10 Min: 0 Act: 0
Avg: 3 Max: 30
T:13 ( 2701) P:67 I: 6505000 C: 10 Min: 1 Act: 1
Avg: 3 Max: 32
T:14 ( 2702) P:66 I: 7005000 C: 10 Min: 0 Act: 0
Avg: 3 Max: 34
T:15 ( 2703) P:65 I: 7505000 C: 8 Min: 0 Act: 2
Avg: 4 Max: 36
T:16 ( 2704) P:64 I: 8005000 C: 8 Min: 0 Act: 1
Avg: 5 Max: 38
T:17 ( 2705) P:63 I: 8505000 C: 8 Min: 0 Act: 1
Avg: 5 Max: 40
T:18 ( 2706) P:62 I: 9005000 C: 8 Min: 0 Act: 0
Avg: 5 Max: 42
T:19 ( 2707) P:61 I: 9505000 C: 8 Min: 0 Act: 0
Avg: 5 Max: 44
T:20 ( 2708) P:60 I:10005000 C: 6 Min: 3 Act: 3
Avg: 8 Max: 46
This never stops, T0 completes quickly but not others
------------------------------------------------------------------------------------------------
Linux Madan 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15 03:51:20
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
root@Madan:/home/mymo/MADAN_Xeno/rt-tests# ./cyclictest -t 21 -p 80 -i 5000
-l 5000
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 14.44 5.11 1.85 20/444 2835
T: 0 ( 2815) P:80 I:5000 C: 5000 Min: 2 Act: 3 Avg: 3
Max: 18
T: 1 ( 2816) P:80 I:5500 C: 4541 Min: 2 Act: 3 Avg: 3
Max: 21
T: 2 ( 2817) P:80 I:6000 C: 4163 Min: 2 Act: 3 Avg: 3 Max:
315
T: 3 ( 2818) P:80 I:6500 C: 3843 Min: 2 Act: 3 Avg: 3
Max: 12
T: 4 ( 2819) P:80 I:7000 C: 3568 Min: 2 Act: 2 Avg: 3
Max: 20
T: 5 ( 2820) P:80 I:7500 C: 3330 Min: 2 Act: 3 Avg: 3
Max: 14
T: 6 ( 2821) P:80 I:8000 C: 3122 Min: 2 Act: 3 Avg: 3 Max:
366
T: 7 ( 2822) P:80 I:8500 C: 2938 Min: 2 Act: 3 Avg: 3
Max: 11
T: 8 ( 2823) P:80 I:9000 C: 2775 Min: 2 Act: 3 Avg: 3
Max: 15
T: 9 ( 2824) P:80 I:9500 C: 2629 Min: 2 Act: 3 Avg: 3
Max: 28
T:10 ( 2825) P:80 I:10000 C: 2497 Min: 2 Act: 2 Avg: 3
Max: 15
T:11 ( 2826) P:80 I:10500 C: 2379 Min: 2 Act: 2 Avg: 3
Max: 13
T:12 ( 2827) P:80 I:11000 C: 2270 Min: 2 Act: 4 Avg: 3
Max: 14
T:13 ( 2828) P:80 I:11500 C: 2172 Min: 2 Act: 3 Avg: 3
Max: 15
T:14 ( 2829) P:80 I:12000 C: 2081 Min: 2 Act: 3 Avg: 4
Max: 469
T:15 ( 2830) P:80 I:12500 C: 1998 Min: 2 Act: 2 Avg: 3
Max: 15
T:16 ( 2831) P:80 I:13000 C: 1921 Min: 2 Act: 3 Avg: 3
Max: 30
T:17 ( 2832) P:80 I:13500 C: 1850 Min: 2 Act: 3 Avg: 3
Max: 14
T:18 ( 2833) P:80 I:14000 C: 1784 Min: 2 Act: 3 Avg: 3
Max: 15
T:19 ( 2834) P:80 I:14500 C: 1722 Min: 2 Act: 3 Avg: 3
Max: 13
T:20 ( 2835) P:80 I:15000 C: 1665 Min: 2 Act: 2 Avg: 3
Max: 11
Thanks
M
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Xenomai] CyclicTest query on Xenomai
2015-06-26 6:16 [Xenomai] CyclicTest query on Xenomai Madan Sondur
@ 2015-06-29 5:33 ` Madan Sondur
2015-06-29 6:25 ` Jan Kiszka
0 siblings, 1 reply; 8+ messages in thread
From: Madan Sondur @ 2015-06-29 5:33 UTC (permalink / raw)
To: xenomai
Hi,
Any inputs will be greatly appreciated,
Thanks
M
On Fri, Jun 26, 2015 at 11:46 AM, Madan Sondur <sondur.madan23@gmail.com>
wrote:
> Hi ,
>
> I have installed Xenomai 2.6.4 on Ubuntu 12.04 64 bit.
>
> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
> x86_64 x86_64 x86_64 GNU/Linux
>
> After successfull installation, i am getting varied results with
> cyclictest present in /usr/xenomai/bin folder and the one in the rt-tests
> which i downloaded.
>
> pi_stress is used in background to stress the system.
>
> Xenomai cyclictest takes a lot of time to complete other threads, where as
> the first one completes quickly. This is exactly the opposite if i run the
> cyclictest, first thread completes and the test stops.
>
> 1) is my observation correct? I may be missing some understanding here.?
>
> 2) This is done in Core i7, the difference in latencies with and without
> xenomai are noticeable but not significant, Is this correct ?
>
> 3) I trying to have Hard real time System with minimal latencies ?
>
> Below are output results.
>
> Can you please help.
>
>
> ------------------------------------------------------------------------------------------------
> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
> x86_64 x86_64 x86_64 GNU/Linux
>
> root@Madan:/usr/xenomai/bin#/home/mymo/MADAN_Xeno/rt-tests/cyclictest -t
> 21 -p 80 -i 5000 -l 5000
> # /dev/cpu_dma_latency set to 0us
> policy: fifo: loadavg: 0.00 0.01 0.01 1/405 2756
>
> T: 0 ( 2736) P:80 I:5000 C: 5000 Min: 2 Act: 5 Avg: 3
> Max: 24
> T: 1 ( 2737) P:80 I:5500 C: 4546 Min: 1 Act: 2 Avg: 2
> Max: 18
> T: 2 ( 2738) P:80 I:6000 C: 4167 Min: 2 Act: 2 Avg: 2
> Max: 26
> T: 3 ( 2739) P:80 I:6500 C: 3847 Min: 1 Act: 2 Avg: 2
> Max: 20
> T: 4 ( 2740) P:80 I:7000 C: 3572 Min: 1 Act: 3 Avg: 2
> Max: 16
> T: 5 ( 2741) P:80 I:7500 C: 3334 Min: 2 Act: 2 Avg: 2
> Max: 20
> T: 6 ( 2742) P:80 I:8000 C: 3125 Min: 1 Act: 4 Avg: 2
> Max: 21
> T: 7 ( 2743) P:80 I:8500 C: 2942 Min: 1 Act: 2 Avg: 3
> Max: 18
> T: 8 ( 2744) P:80 I:9000 C: 2778 Min: 1 Act: 3 Avg: 2
> Max: 16
> T: 9 ( 2745) P:80 I:9500 C: 2632 Min: 1 Act: 3 Avg: 2
> Max: 13
> T:10 ( 2746) P:80 I:10000 C: 2500 Min: 2 Act: 3 Avg: 2
> Max: 26
> T:11 ( 2747) P:80 I:10500 C: 2381 Min: 1 Act: 3 Avg: 2
> Max: 14
> T:12 ( 2748) P:80 I:11000 C: 2273 Min: 2 Act: 3 Avg: 2
> Max: 19
> T:13 ( 2749) P:80 I:11500 C: 2174 Min: 2 Act: 3 Avg: 2
> Max: 18
> T:14 ( 2750) P:80 I:12000 C: 2083 Min: 2 Act: 3 Avg: 2
> Max: 13
> T:15 ( 2751) P:80 I:12500 C: 2000 Min: 2 Act: 3 Avg: 2
> Max: 17
> T:16 ( 2752) P:80 I:13000 C: 1923 Min: 2 Act: 3 Avg: 2
> Max: 9
> T:17 ( 2753) P:80 I:13500 C: 1852 Min: 2 Act: 3 Avg: 3
> Max: 17
> T:18 ( 2754) P:80 I:14000 C: 1786 Min: 1 Act: 3 Avg: 2
> Max: 11
> T:19 ( 2755) P:80 I:14500 C: 1724 Min: 2 Act: 3 Avg: 3
> Max: 21
> T:20 ( 2756) P:80 I:15000 C: 1667 Min: 2 Act: 3 Avg: 2
> Max: 8
>
>
> root@Madan:/usr/xenomai/bin# ./xeno cyclictest -t 21 -p 80 -i 5000 -l 5000
> 0.01 0.01 0.01 1/410 2708
>
> T: 0 ( 2688) P:80 I: 5000 C: 5000 Min: -2 Act: -2
> Avg: 0 Max: 12
> T: 1 ( 2689) P:79 I: 505000 C: 120 Min: 0 Act: 7
> Avg: 0 Max: 9
> T: 2 ( 2690) P:78 I: 1005000 C: 60 Min: 0 Act: 2
> Avg: 0 Max: 11
> T: 3 ( 2691) P:77 I: 1505000 C: 40 Min: 0 Act: 2
> Avg: 0 Max: 13
> T: 4 ( 2692) P:76 I: 2005000 C: 30 Min: 0 Act: 0
> Avg: 0 Max: 15
> T: 5 ( 2693) P:75 I: 2505000 C: 24 Min: 0 Act: 0
> Avg: 0 Max: 16
> T: 6 ( 2694) P:74 I: 3005000 C: 20 Min: 0 Act: 0
> Avg: 0 Max: 19
> T: 7 ( 2695) P:73 I: 3505000 C: 18 Min: 0 Act: 0
> Avg: 1 Max: 21
> T: 8 ( 2696) P:72 I: 4005000 C: 16 Min: 0 Act: 0
> Avg: 1 Max: 23
> T: 9 ( 2697) P:71 I: 4505000 C: 14 Min: 0 Act: 0
> Avg: 2 Max: 24
> T:10 ( 2698) P:70 I: 5005000 C: 12 Min: 0 Act: 2
> Avg: 2 Max: 26
> T:11 ( 2699) P:69 I: 5505000 C: 12 Min: 0 Act: 2
> Avg: 2 Max: 28
> T:12 ( 2700) P:68 I: 6005000 C: 10 Min: 0 Act: 0
> Avg: 3 Max: 30
> T:13 ( 2701) P:67 I: 6505000 C: 10 Min: 1 Act: 1
> Avg: 3 Max: 32
> T:14 ( 2702) P:66 I: 7005000 C: 10 Min: 0 Act: 0
> Avg: 3 Max: 34
> T:15 ( 2703) P:65 I: 7505000 C: 8 Min: 0 Act: 2
> Avg: 4 Max: 36
> T:16 ( 2704) P:64 I: 8005000 C: 8 Min: 0 Act: 1
> Avg: 5 Max: 38
> T:17 ( 2705) P:63 I: 8505000 C: 8 Min: 0 Act: 1
> Avg: 5 Max: 40
> T:18 ( 2706) P:62 I: 9005000 C: 8 Min: 0 Act: 0
> Avg: 5 Max: 42
> T:19 ( 2707) P:61 I: 9505000 C: 8 Min: 0 Act: 0
> Avg: 5 Max: 44
> T:20 ( 2708) P:60 I:10005000 C: 6 Min: 3 Act: 3
> Avg: 8 Max: 46
>
> This never stops, T0 completes quickly but not others
>
>
> ------------------------------------------------------------------------------------------------
> Linux Madan 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15 03:51:20
> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
>
> root@Madan:/home/mymo/MADAN_Xeno/rt-tests# ./cyclictest -t 21 -p 80 -i
> 5000 -l 5000
> # /dev/cpu_dma_latency set to 0us
> policy: fifo: loadavg: 14.44 5.11 1.85 20/444 2835
>
> T: 0 ( 2815) P:80 I:5000 C: 5000 Min: 2 Act: 3 Avg: 3
> Max: 18
> T: 1 ( 2816) P:80 I:5500 C: 4541 Min: 2 Act: 3 Avg: 3
> Max: 21
> T: 2 ( 2817) P:80 I:6000 C: 4163 Min: 2 Act: 3 Avg: 3
> Max: 315
> T: 3 ( 2818) P:80 I:6500 C: 3843 Min: 2 Act: 3 Avg: 3
> Max: 12
> T: 4 ( 2819) P:80 I:7000 C: 3568 Min: 2 Act: 2 Avg: 3
> Max: 20
> T: 5 ( 2820) P:80 I:7500 C: 3330 Min: 2 Act: 3 Avg: 3
> Max: 14
> T: 6 ( 2821) P:80 I:8000 C: 3122 Min: 2 Act: 3 Avg: 3
> Max: 366
> T: 7 ( 2822) P:80 I:8500 C: 2938 Min: 2 Act: 3 Avg: 3
> Max: 11
> T: 8 ( 2823) P:80 I:9000 C: 2775 Min: 2 Act: 3 Avg: 3
> Max: 15
> T: 9 ( 2824) P:80 I:9500 C: 2629 Min: 2 Act: 3 Avg: 3
> Max: 28
> T:10 ( 2825) P:80 I:10000 C: 2497 Min: 2 Act: 2 Avg: 3
> Max: 15
> T:11 ( 2826) P:80 I:10500 C: 2379 Min: 2 Act: 2 Avg: 3
> Max: 13
> T:12 ( 2827) P:80 I:11000 C: 2270 Min: 2 Act: 4 Avg: 3
> Max: 14
> T:13 ( 2828) P:80 I:11500 C: 2172 Min: 2 Act: 3 Avg: 3
> Max: 15
> T:14 ( 2829) P:80 I:12000 C: 2081 Min: 2 Act: 3 Avg: 4
> Max: 469
> T:15 ( 2830) P:80 I:12500 C: 1998 Min: 2 Act: 2 Avg: 3
> Max: 15
> T:16 ( 2831) P:80 I:13000 C: 1921 Min: 2 Act: 3 Avg: 3
> Max: 30
> T:17 ( 2832) P:80 I:13500 C: 1850 Min: 2 Act: 3 Avg: 3
> Max: 14
> T:18 ( 2833) P:80 I:14000 C: 1784 Min: 2 Act: 3 Avg: 3
> Max: 15
> T:19 ( 2834) P:80 I:14500 C: 1722 Min: 2 Act: 3 Avg: 3
> Max: 13
> T:20 ( 2835) P:80 I:15000 C: 1665 Min: 2 Act: 2 Avg: 3
> Max: 11
>
>
>
> Thanks
>
> M
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Xenomai] CyclicTest query on Xenomai
2015-06-29 5:33 ` Madan Sondur
@ 2015-06-29 6:25 ` Jan Kiszka
2015-06-30 3:34 ` Madan Sondur
0 siblings, 1 reply; 8+ messages in thread
From: Jan Kiszka @ 2015-06-29 6:25 UTC (permalink / raw)
To: Madan Sondur, xenomai
On 2015-06-29 07:33, Madan Sondur wrote:
> Hi,
> Any inputs will be greatly appreciated,
Apply proper load on Linux (e.g. via xeno-test) and run the tests over a
much longer period to get relevant results.
Jan
>
> Thanks
> M
>
> On Fri, Jun 26, 2015 at 11:46 AM, Madan Sondur <sondur.madan23@gmail.com>
> wrote:
>
>> Hi ,
>>
>> I have installed Xenomai 2.6.4 on Ubuntu 12.04 64 bit.
>>
>> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
>> x86_64 x86_64 x86_64 GNU/Linux
>>
>> After successfull installation, i am getting varied results with
>> cyclictest present in /usr/xenomai/bin folder and the one in the rt-tests
>> which i downloaded.
>>
>> pi_stress is used in background to stress the system.
>>
>> Xenomai cyclictest takes a lot of time to complete other threads, where as
>> the first one completes quickly. This is exactly the opposite if i run the
>> cyclictest, first thread completes and the test stops.
>>
>> 1) is my observation correct? I may be missing some understanding here.?
>>
>> 2) This is done in Core i7, the difference in latencies with and without
>> xenomai are noticeable but not significant, Is this correct ?
>>
>> 3) I trying to have Hard real time System with minimal latencies ?
>>
>> Below are output results.
>>
>> Can you please help.
>>
>>
>> ------------------------------------------------------------------------------------------------
>> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
>> x86_64 x86_64 x86_64 GNU/Linux
>>
>> root@Madan:/usr/xenomai/bin#/home/mymo/MADAN_Xeno/rt-tests/cyclictest -t
>> 21 -p 80 -i 5000 -l 5000
>> # /dev/cpu_dma_latency set to 0us
>> policy: fifo: loadavg: 0.00 0.01 0.01 1/405 2756
>>
>> T: 0 ( 2736) P:80 I:5000 C: 5000 Min: 2 Act: 5 Avg: 3
>> Max: 24
>> T: 1 ( 2737) P:80 I:5500 C: 4546 Min: 1 Act: 2 Avg: 2
>> Max: 18
>> T: 2 ( 2738) P:80 I:6000 C: 4167 Min: 2 Act: 2 Avg: 2
>> Max: 26
>> T: 3 ( 2739) P:80 I:6500 C: 3847 Min: 1 Act: 2 Avg: 2
>> Max: 20
>> T: 4 ( 2740) P:80 I:7000 C: 3572 Min: 1 Act: 3 Avg: 2
>> Max: 16
>> T: 5 ( 2741) P:80 I:7500 C: 3334 Min: 2 Act: 2 Avg: 2
>> Max: 20
>> T: 6 ( 2742) P:80 I:8000 C: 3125 Min: 1 Act: 4 Avg: 2
>> Max: 21
>> T: 7 ( 2743) P:80 I:8500 C: 2942 Min: 1 Act: 2 Avg: 3
>> Max: 18
>> T: 8 ( 2744) P:80 I:9000 C: 2778 Min: 1 Act: 3 Avg: 2
>> Max: 16
>> T: 9 ( 2745) P:80 I:9500 C: 2632 Min: 1 Act: 3 Avg: 2
>> Max: 13
>> T:10 ( 2746) P:80 I:10000 C: 2500 Min: 2 Act: 3 Avg: 2
>> Max: 26
>> T:11 ( 2747) P:80 I:10500 C: 2381 Min: 1 Act: 3 Avg: 2
>> Max: 14
>> T:12 ( 2748) P:80 I:11000 C: 2273 Min: 2 Act: 3 Avg: 2
>> Max: 19
>> T:13 ( 2749) P:80 I:11500 C: 2174 Min: 2 Act: 3 Avg: 2
>> Max: 18
>> T:14 ( 2750) P:80 I:12000 C: 2083 Min: 2 Act: 3 Avg: 2
>> Max: 13
>> T:15 ( 2751) P:80 I:12500 C: 2000 Min: 2 Act: 3 Avg: 2
>> Max: 17
>> T:16 ( 2752) P:80 I:13000 C: 1923 Min: 2 Act: 3 Avg: 2
>> Max: 9
>> T:17 ( 2753) P:80 I:13500 C: 1852 Min: 2 Act: 3 Avg: 3
>> Max: 17
>> T:18 ( 2754) P:80 I:14000 C: 1786 Min: 1 Act: 3 Avg: 2
>> Max: 11
>> T:19 ( 2755) P:80 I:14500 C: 1724 Min: 2 Act: 3 Avg: 3
>> Max: 21
>> T:20 ( 2756) P:80 I:15000 C: 1667 Min: 2 Act: 3 Avg: 2
>> Max: 8
>>
>>
>> root@Madan:/usr/xenomai/bin# ./xeno cyclictest -t 21 -p 80 -i 5000 -l 5000
>> 0.01 0.01 0.01 1/410 2708
>>
>> T: 0 ( 2688) P:80 I: 5000 C: 5000 Min: -2 Act: -2
>> Avg: 0 Max: 12
>> T: 1 ( 2689) P:79 I: 505000 C: 120 Min: 0 Act: 7
>> Avg: 0 Max: 9
>> T: 2 ( 2690) P:78 I: 1005000 C: 60 Min: 0 Act: 2
>> Avg: 0 Max: 11
>> T: 3 ( 2691) P:77 I: 1505000 C: 40 Min: 0 Act: 2
>> Avg: 0 Max: 13
>> T: 4 ( 2692) P:76 I: 2005000 C: 30 Min: 0 Act: 0
>> Avg: 0 Max: 15
>> T: 5 ( 2693) P:75 I: 2505000 C: 24 Min: 0 Act: 0
>> Avg: 0 Max: 16
>> T: 6 ( 2694) P:74 I: 3005000 C: 20 Min: 0 Act: 0
>> Avg: 0 Max: 19
>> T: 7 ( 2695) P:73 I: 3505000 C: 18 Min: 0 Act: 0
>> Avg: 1 Max: 21
>> T: 8 ( 2696) P:72 I: 4005000 C: 16 Min: 0 Act: 0
>> Avg: 1 Max: 23
>> T: 9 ( 2697) P:71 I: 4505000 C: 14 Min: 0 Act: 0
>> Avg: 2 Max: 24
>> T:10 ( 2698) P:70 I: 5005000 C: 12 Min: 0 Act: 2
>> Avg: 2 Max: 26
>> T:11 ( 2699) P:69 I: 5505000 C: 12 Min: 0 Act: 2
>> Avg: 2 Max: 28
>> T:12 ( 2700) P:68 I: 6005000 C: 10 Min: 0 Act: 0
>> Avg: 3 Max: 30
>> T:13 ( 2701) P:67 I: 6505000 C: 10 Min: 1 Act: 1
>> Avg: 3 Max: 32
>> T:14 ( 2702) P:66 I: 7005000 C: 10 Min: 0 Act: 0
>> Avg: 3 Max: 34
>> T:15 ( 2703) P:65 I: 7505000 C: 8 Min: 0 Act: 2
>> Avg: 4 Max: 36
>> T:16 ( 2704) P:64 I: 8005000 C: 8 Min: 0 Act: 1
>> Avg: 5 Max: 38
>> T:17 ( 2705) P:63 I: 8505000 C: 8 Min: 0 Act: 1
>> Avg: 5 Max: 40
>> T:18 ( 2706) P:62 I: 9005000 C: 8 Min: 0 Act: 0
>> Avg: 5 Max: 42
>> T:19 ( 2707) P:61 I: 9505000 C: 8 Min: 0 Act: 0
>> Avg: 5 Max: 44
>> T:20 ( 2708) P:60 I:10005000 C: 6 Min: 3 Act: 3
>> Avg: 8 Max: 46
>>
>> This never stops, T0 completes quickly but not others
>>
>>
>> ------------------------------------------------------------------------------------------------
>> Linux Madan 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15 03:51:20
>> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
>>
>> root@Madan:/home/mymo/MADAN_Xeno/rt-tests# ./cyclictest -t 21 -p 80 -i
>> 5000 -l 5000
>> # /dev/cpu_dma_latency set to 0us
>> policy: fifo: loadavg: 14.44 5.11 1.85 20/444 2835
>>
>> T: 0 ( 2815) P:80 I:5000 C: 5000 Min: 2 Act: 3 Avg: 3
>> Max: 18
>> T: 1 ( 2816) P:80 I:5500 C: 4541 Min: 2 Act: 3 Avg: 3
>> Max: 21
>> T: 2 ( 2817) P:80 I:6000 C: 4163 Min: 2 Act: 3 Avg: 3
>> Max: 315
>> T: 3 ( 2818) P:80 I:6500 C: 3843 Min: 2 Act: 3 Avg: 3
>> Max: 12
>> T: 4 ( 2819) P:80 I:7000 C: 3568 Min: 2 Act: 2 Avg: 3
>> Max: 20
>> T: 5 ( 2820) P:80 I:7500 C: 3330 Min: 2 Act: 3 Avg: 3
>> Max: 14
>> T: 6 ( 2821) P:80 I:8000 C: 3122 Min: 2 Act: 3 Avg: 3
>> Max: 366
>> T: 7 ( 2822) P:80 I:8500 C: 2938 Min: 2 Act: 3 Avg: 3
>> Max: 11
>> T: 8 ( 2823) P:80 I:9000 C: 2775 Min: 2 Act: 3 Avg: 3
>> Max: 15
>> T: 9 ( 2824) P:80 I:9500 C: 2629 Min: 2 Act: 3 Avg: 3
>> Max: 28
>> T:10 ( 2825) P:80 I:10000 C: 2497 Min: 2 Act: 2 Avg: 3
>> Max: 15
>> T:11 ( 2826) P:80 I:10500 C: 2379 Min: 2 Act: 2 Avg: 3
>> Max: 13
>> T:12 ( 2827) P:80 I:11000 C: 2270 Min: 2 Act: 4 Avg: 3
>> Max: 14
>> T:13 ( 2828) P:80 I:11500 C: 2172 Min: 2 Act: 3 Avg: 3
>> Max: 15
>> T:14 ( 2829) P:80 I:12000 C: 2081 Min: 2 Act: 3 Avg: 4
>> Max: 469
>> T:15 ( 2830) P:80 I:12500 C: 1998 Min: 2 Act: 2 Avg: 3
>> Max: 15
>> T:16 ( 2831) P:80 I:13000 C: 1921 Min: 2 Act: 3 Avg: 3
>> Max: 30
>> T:17 ( 2832) P:80 I:13500 C: 1850 Min: 2 Act: 3 Avg: 3
>> Max: 14
>> T:18 ( 2833) P:80 I:14000 C: 1784 Min: 2 Act: 3 Avg: 3
>> Max: 15
>> T:19 ( 2834) P:80 I:14500 C: 1722 Min: 2 Act: 3 Avg: 3
>> Max: 13
>> T:20 ( 2835) P:80 I:15000 C: 1665 Min: 2 Act: 2 Avg: 3
>> Max: 11
>>
>>
>>
>> Thanks
>>
>> M
>>
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* Re: [Xenomai] CyclicTest query on Xenomai
2015-06-29 6:25 ` Jan Kiszka
@ 2015-06-30 3:34 ` Madan Sondur
2015-06-30 5:40 ` Jan Kiszka
0 siblings, 1 reply; 8+ messages in thread
From: Madan Sondur @ 2015-06-30 3:34 UTC (permalink / raw)
To: Jan Kiszka; +Cc: xenomai
I stress tested the system for an hour using Pi-stress and pumping huge
amount of data through usb3.0 and I perf at network. What I have observed
is cyclictest from usr/xenomai/bin behaves differently, only the first
thread completes then after all the other threads execute very slowly, you
can see the count value.
But the cyclictest that was downloaded from net completes all the threads
and exits.
The results of sample tests for 5000 loops are as shown.
Xenomai cyclictest T1 count is 120, where as cyclictest which is from net
has T1 count of 4546.
Why is this behaviour?
Thx
M
On 29-Jun-2015 11:55 am, "Jan Kiszka" <jan.kiszka@web.de> wrote:
> On 2015-06-29 07:33, Madan Sondur wrote:
> > Hi,
> > Any inputs will be greatly appreciated,
>
> Apply proper load on Linux (e.g. via xeno-test) and run the tests over a
> much longer period to get relevant results.
>
> Jan
>
> >
> > Thanks
> > M
> >
> > On Fri, Jun 26, 2015 at 11:46 AM, Madan Sondur <sondur.madan23@gmail.com
> >
> > wrote:
> >
> >> Hi ,
> >>
> >> I have installed Xenomai 2.6.4 on Ubuntu 12.04 64 bit.
> >>
> >> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
> >> x86_64 x86_64 x86_64 GNU/Linux
> >>
> >> After successfull installation, i am getting varied results with
> >> cyclictest present in /usr/xenomai/bin folder and the one in the
> rt-tests
> >> which i downloaded.
> >>
> >> pi_stress is used in background to stress the system.
> >>
> >> Xenomai cyclictest takes a lot of time to complete other threads, where
> as
> >> the first one completes quickly. This is exactly the opposite if i run
> the
> >> cyclictest, first thread completes and the test stops.
> >>
> >> 1) is my observation correct? I may be missing some understanding here.?
> >>
> >> 2) This is done in Core i7, the difference in latencies with and without
> >> xenomai are noticeable but not significant, Is this correct ?
> >>
> >> 3) I trying to have Hard real time System with minimal latencies ?
> >>
> >> Below are output results.
> >>
> >> Can you please help.
> >>
> >>
> >>
> ------------------------------------------------------------------------------------------------
> >> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
> >> x86_64 x86_64 x86_64 GNU/Linux
> >>
> >> root@Madan:/usr/xenomai/bin#/home/mymo/MADAN_Xeno/rt-tests/cyclictest
> -t
> >> 21 -p 80 -i 5000 -l 5000
> >> # /dev/cpu_dma_latency set to 0us
> >> policy: fifo: loadavg: 0.00 0.01 0.01 1/405 2756
> >>
> >> T: 0 ( 2736) P:80 I:5000 C: 5000 Min: 2 Act: 5 Avg: 3
> >> Max: 24
> >> T: 1 ( 2737) P:80 I:5500 C: 4546 Min: 1 Act: 2 Avg: 2
> >> Max: 18
> >> T: 2 ( 2738) P:80 I:6000 C: 4167 Min: 2 Act: 2 Avg: 2
> >> Max: 26
> >> T: 3 ( 2739) P:80 I:6500 C: 3847 Min: 1 Act: 2 Avg: 2
> >> Max: 20
> >> T: 4 ( 2740) P:80 I:7000 C: 3572 Min: 1 Act: 3 Avg: 2
> >> Max: 16
> >> T: 5 ( 2741) P:80 I:7500 C: 3334 Min: 2 Act: 2 Avg: 2
> >> Max: 20
> >> T: 6 ( 2742) P:80 I:8000 C: 3125 Min: 1 Act: 4 Avg: 2
> >> Max: 21
> >> T: 7 ( 2743) P:80 I:8500 C: 2942 Min: 1 Act: 2 Avg: 3
> >> Max: 18
> >> T: 8 ( 2744) P:80 I:9000 C: 2778 Min: 1 Act: 3 Avg: 2
> >> Max: 16
> >> T: 9 ( 2745) P:80 I:9500 C: 2632 Min: 1 Act: 3 Avg: 2
> >> Max: 13
> >> T:10 ( 2746) P:80 I:10000 C: 2500 Min: 2 Act: 3 Avg: 2
> >> Max: 26
> >> T:11 ( 2747) P:80 I:10500 C: 2381 Min: 1 Act: 3 Avg: 2
> >> Max: 14
> >> T:12 ( 2748) P:80 I:11000 C: 2273 Min: 2 Act: 3 Avg: 2
> >> Max: 19
> >> T:13 ( 2749) P:80 I:11500 C: 2174 Min: 2 Act: 3 Avg: 2
> >> Max: 18
> >> T:14 ( 2750) P:80 I:12000 C: 2083 Min: 2 Act: 3 Avg: 2
> >> Max: 13
> >> T:15 ( 2751) P:80 I:12500 C: 2000 Min: 2 Act: 3 Avg: 2
> >> Max: 17
> >> T:16 ( 2752) P:80 I:13000 C: 1923 Min: 2 Act: 3 Avg: 2
> >> Max: 9
> >> T:17 ( 2753) P:80 I:13500 C: 1852 Min: 2 Act: 3 Avg: 3
> >> Max: 17
> >> T:18 ( 2754) P:80 I:14000 C: 1786 Min: 1 Act: 3 Avg: 2
> >> Max: 11
> >> T:19 ( 2755) P:80 I:14500 C: 1724 Min: 2 Act: 3 Avg: 3
> >> Max: 21
> >> T:20 ( 2756) P:80 I:15000 C: 1667 Min: 2 Act: 3 Avg: 2
> >> Max: 8
> >>
> >>
> >> root@Madan:/usr/xenomai/bin# ./xeno cyclictest -t 21 -p 80 -i 5000 -l
> 5000
> >> 0.01 0.01 0.01 1/410 2708
> >>
> >> T: 0 ( 2688) P:80 I: 5000 C: 5000 Min: -2 Act: -2
> >> Avg: 0 Max: 12
> >> T: 1 ( 2689) P:79 I: 505000 C: 120 Min: 0 Act: 7
> >> Avg: 0 Max: 9
> >> T: 2 ( 2690) P:78 I: 1005000 C: 60 Min: 0 Act: 2
> >> Avg: 0 Max: 11
> >> T: 3 ( 2691) P:77 I: 1505000 C: 40 Min: 0 Act: 2
> >> Avg: 0 Max: 13
> >> T: 4 ( 2692) P:76 I: 2005000 C: 30 Min: 0 Act: 0
> >> Avg: 0 Max: 15
> >> T: 5 ( 2693) P:75 I: 2505000 C: 24 Min: 0 Act: 0
> >> Avg: 0 Max: 16
> >> T: 6 ( 2694) P:74 I: 3005000 C: 20 Min: 0 Act: 0
> >> Avg: 0 Max: 19
> >> T: 7 ( 2695) P:73 I: 3505000 C: 18 Min: 0 Act: 0
> >> Avg: 1 Max: 21
> >> T: 8 ( 2696) P:72 I: 4005000 C: 16 Min: 0 Act: 0
> >> Avg: 1 Max: 23
> >> T: 9 ( 2697) P:71 I: 4505000 C: 14 Min: 0 Act: 0
> >> Avg: 2 Max: 24
> >> T:10 ( 2698) P:70 I: 5005000 C: 12 Min: 0 Act: 2
> >> Avg: 2 Max: 26
> >> T:11 ( 2699) P:69 I: 5505000 C: 12 Min: 0 Act: 2
> >> Avg: 2 Max: 28
> >> T:12 ( 2700) P:68 I: 6005000 C: 10 Min: 0 Act: 0
> >> Avg: 3 Max: 30
> >> T:13 ( 2701) P:67 I: 6505000 C: 10 Min: 1 Act: 1
> >> Avg: 3 Max: 32
> >> T:14 ( 2702) P:66 I: 7005000 C: 10 Min: 0 Act: 0
> >> Avg: 3 Max: 34
> >> T:15 ( 2703) P:65 I: 7505000 C: 8 Min: 0 Act: 2
> >> Avg: 4 Max: 36
> >> T:16 ( 2704) P:64 I: 8005000 C: 8 Min: 0 Act: 1
> >> Avg: 5 Max: 38
> >> T:17 ( 2705) P:63 I: 8505000 C: 8 Min: 0 Act: 1
> >> Avg: 5 Max: 40
> >> T:18 ( 2706) P:62 I: 9005000 C: 8 Min: 0 Act: 0
> >> Avg: 5 Max: 42
> >> T:19 ( 2707) P:61 I: 9505000 C: 8 Min: 0 Act: 0
> >> Avg: 5 Max: 44
> >> T:20 ( 2708) P:60 I:10005000 C: 6 Min: 3 Act: 3
> >> Avg: 8 Max: 46
> >>
> >> This never stops, T0 completes quickly but not others
> >>
> >>
> >>
> ------------------------------------------------------------------------------------------------
> >> Linux Madan 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15
> 03:51:20
> >> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
> >>
> >> root@Madan:/home/mymo/MADAN_Xeno/rt-tests# ./cyclictest -t 21 -p 80 -i
> >> 5000 -l 5000
> >> # /dev/cpu_dma_latency set to 0us
> >> policy: fifo: loadavg: 14.44 5.11 1.85 20/444 2835
> >>
> >> T: 0 ( 2815) P:80 I:5000 C: 5000 Min: 2 Act: 3 Avg: 3
> >> Max: 18
> >> T: 1 ( 2816) P:80 I:5500 C: 4541 Min: 2 Act: 3 Avg: 3
> >> Max: 21
> >> T: 2 ( 2817) P:80 I:6000 C: 4163 Min: 2 Act: 3 Avg: 3
> >> Max: 315
> >> T: 3 ( 2818) P:80 I:6500 C: 3843 Min: 2 Act: 3 Avg: 3
> >> Max: 12
> >> T: 4 ( 2819) P:80 I:7000 C: 3568 Min: 2 Act: 2 Avg: 3
> >> Max: 20
> >> T: 5 ( 2820) P:80 I:7500 C: 3330 Min: 2 Act: 3 Avg: 3
> >> Max: 14
> >> T: 6 ( 2821) P:80 I:8000 C: 3122 Min: 2 Act: 3 Avg: 3
> >> Max: 366
> >> T: 7 ( 2822) P:80 I:8500 C: 2938 Min: 2 Act: 3 Avg: 3
> >> Max: 11
> >> T: 8 ( 2823) P:80 I:9000 C: 2775 Min: 2 Act: 3 Avg: 3
> >> Max: 15
> >> T: 9 ( 2824) P:80 I:9500 C: 2629 Min: 2 Act: 3 Avg: 3
> >> Max: 28
> >> T:10 ( 2825) P:80 I:10000 C: 2497 Min: 2 Act: 2 Avg: 3
> >> Max: 15
> >> T:11 ( 2826) P:80 I:10500 C: 2379 Min: 2 Act: 2 Avg: 3
> >> Max: 13
> >> T:12 ( 2827) P:80 I:11000 C: 2270 Min: 2 Act: 4 Avg: 3
> >> Max: 14
> >> T:13 ( 2828) P:80 I:11500 C: 2172 Min: 2 Act: 3 Avg: 3
> >> Max: 15
> >> T:14 ( 2829) P:80 I:12000 C: 2081 Min: 2 Act: 3 Avg: 4
> >> Max: 469
> >> T:15 ( 2830) P:80 I:12500 C: 1998 Min: 2 Act: 2 Avg: 3
> >> Max: 15
> >> T:16 ( 2831) P:80 I:13000 C: 1921 Min: 2 Act: 3 Avg: 3
> >> Max: 30
> >> T:17 ( 2832) P:80 I:13500 C: 1850 Min: 2 Act: 3 Avg: 3
> >> Max: 14
> >> T:18 ( 2833) P:80 I:14000 C: 1784 Min: 2 Act: 3 Avg: 3
> >> Max: 15
> >> T:19 ( 2834) P:80 I:14500 C: 1722 Min: 2 Act: 3 Avg: 3
> >> Max: 13
> >> T:20 ( 2835) P:80 I:15000 C: 1665 Min: 2 Act: 2 Avg: 3
> >> Max: 11
> >>
> >>
> >>
> >> Thanks
> >>
> >> M
> >>
>
>
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Xenomai] CyclicTest query on Xenomai
2015-06-30 3:34 ` Madan Sondur
@ 2015-06-30 5:40 ` Jan Kiszka
2015-06-30 10:45 ` Madan Sondur
0 siblings, 1 reply; 8+ messages in thread
From: Jan Kiszka @ 2015-06-30 5:40 UTC (permalink / raw)
To: Madan Sondur; +Cc: xenomai
Please don't top-post.
On 2015-06-30 05:34, Madan Sondur wrote:
> I stress tested the system for an hour using Pi-stress and pumping huge
> amount of data through usb3.0 and I perf at network. What I have observed
> is cyclictest from usr/xenomai/bin behaves differently, only the first
> thread completes then after all the other threads execute very slowly, you
> can see the count value.
>
> But the cyclictest that was downloaded from net completes all the threads
> and exits.
>
> The results of sample tests for 5000 loops are as shown.
>
> Xenomai cyclictest T1 count is 120, where as cyclictest which is from net
> has T1 count of 4546.
>
> Why is this behaviour?
Xenomai uses different interval spreading than rt-test, see your
outputs. There is probably a bug in the Xenomai version of cyclictest,
getting some order of magnitude wrong with the default settings. Should
be easy to fix.
The fact that you see over 300 µs worst-case latencies with vanilla
cyclictest on a standard kernel and that you don't get this with the
same test program over a Xenomai kernel, indicates that your test method
was not correct, e.g. that load was affecting only the other cores.
Xenomai does not improve the latencies of normal applications.
Jan
>
> Thx
> M
> On 29-Jun-2015 11:55 am, "Jan Kiszka" <jan.kiszka@web.de> wrote:
>
>> On 2015-06-29 07:33, Madan Sondur wrote:
>>> Hi,
>>> Any inputs will be greatly appreciated,
>>
>> Apply proper load on Linux (e.g. via xeno-test) and run the tests over a
>> much longer period to get relevant results.
>>
>> Jan
>>
>>>
>>> Thanks
>>> M
>>>
>>> On Fri, Jun 26, 2015 at 11:46 AM, Madan Sondur <sondur.madan23@gmail.com
>>>
>>> wrote:
>>>
>>>> Hi ,
>>>>
>>>> I have installed Xenomai 2.6.4 on Ubuntu 12.04 64 bit.
>>>>
>>>> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
>>>> x86_64 x86_64 x86_64 GNU/Linux
>>>>
>>>> After successfull installation, i am getting varied results with
>>>> cyclictest present in /usr/xenomai/bin folder and the one in the
>> rt-tests
>>>> which i downloaded.
>>>>
>>>> pi_stress is used in background to stress the system.
>>>>
>>>> Xenomai cyclictest takes a lot of time to complete other threads, where
>> as
>>>> the first one completes quickly. This is exactly the opposite if i run
>> the
>>>> cyclictest, first thread completes and the test stops.
>>>>
>>>> 1) is my observation correct? I may be missing some understanding here.?
>>>>
>>>> 2) This is done in Core i7, the difference in latencies with and without
>>>> xenomai are noticeable but not significant, Is this correct ?
>>>>
>>>> 3) I trying to have Hard real time System with minimal latencies ?
>>>>
>>>> Below are output results.
>>>>
>>>> Can you please help.
>>>>
>>>>
>>>>
>> ------------------------------------------------------------------------------------------------
>>>> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
>>>> x86_64 x86_64 x86_64 GNU/Linux
>>>>
>>>> root@Madan:/usr/xenomai/bin#/home/mymo/MADAN_Xeno/rt-tests/cyclictest
>> -t
>>>> 21 -p 80 -i 5000 -l 5000
>>>> # /dev/cpu_dma_latency set to 0us
>>>> policy: fifo: loadavg: 0.00 0.01 0.01 1/405 2756
>>>>
>>>> T: 0 ( 2736) P:80 I:5000 C: 5000 Min: 2 Act: 5 Avg: 3
>>>> Max: 24
>>>> T: 1 ( 2737) P:80 I:5500 C: 4546 Min: 1 Act: 2 Avg: 2
>>>> Max: 18
>>>> T: 2 ( 2738) P:80 I:6000 C: 4167 Min: 2 Act: 2 Avg: 2
>>>> Max: 26
>>>> T: 3 ( 2739) P:80 I:6500 C: 3847 Min: 1 Act: 2 Avg: 2
>>>> Max: 20
>>>> T: 4 ( 2740) P:80 I:7000 C: 3572 Min: 1 Act: 3 Avg: 2
>>>> Max: 16
>>>> T: 5 ( 2741) P:80 I:7500 C: 3334 Min: 2 Act: 2 Avg: 2
>>>> Max: 20
>>>> T: 6 ( 2742) P:80 I:8000 C: 3125 Min: 1 Act: 4 Avg: 2
>>>> Max: 21
>>>> T: 7 ( 2743) P:80 I:8500 C: 2942 Min: 1 Act: 2 Avg: 3
>>>> Max: 18
>>>> T: 8 ( 2744) P:80 I:9000 C: 2778 Min: 1 Act: 3 Avg: 2
>>>> Max: 16
>>>> T: 9 ( 2745) P:80 I:9500 C: 2632 Min: 1 Act: 3 Avg: 2
>>>> Max: 13
>>>> T:10 ( 2746) P:80 I:10000 C: 2500 Min: 2 Act: 3 Avg: 2
>>>> Max: 26
>>>> T:11 ( 2747) P:80 I:10500 C: 2381 Min: 1 Act: 3 Avg: 2
>>>> Max: 14
>>>> T:12 ( 2748) P:80 I:11000 C: 2273 Min: 2 Act: 3 Avg: 2
>>>> Max: 19
>>>> T:13 ( 2749) P:80 I:11500 C: 2174 Min: 2 Act: 3 Avg: 2
>>>> Max: 18
>>>> T:14 ( 2750) P:80 I:12000 C: 2083 Min: 2 Act: 3 Avg: 2
>>>> Max: 13
>>>> T:15 ( 2751) P:80 I:12500 C: 2000 Min: 2 Act: 3 Avg: 2
>>>> Max: 17
>>>> T:16 ( 2752) P:80 I:13000 C: 1923 Min: 2 Act: 3 Avg: 2
>>>> Max: 9
>>>> T:17 ( 2753) P:80 I:13500 C: 1852 Min: 2 Act: 3 Avg: 3
>>>> Max: 17
>>>> T:18 ( 2754) P:80 I:14000 C: 1786 Min: 1 Act: 3 Avg: 2
>>>> Max: 11
>>>> T:19 ( 2755) P:80 I:14500 C: 1724 Min: 2 Act: 3 Avg: 3
>>>> Max: 21
>>>> T:20 ( 2756) P:80 I:15000 C: 1667 Min: 2 Act: 3 Avg: 2
>>>> Max: 8
>>>>
>>>>
>>>> root@Madan:/usr/xenomai/bin# ./xeno cyclictest -t 21 -p 80 -i 5000 -l
>> 5000
>>>> 0.01 0.01 0.01 1/410 2708
>>>>
>>>> T: 0 ( 2688) P:80 I: 5000 C: 5000 Min: -2 Act: -2
>>>> Avg: 0 Max: 12
>>>> T: 1 ( 2689) P:79 I: 505000 C: 120 Min: 0 Act: 7
>>>> Avg: 0 Max: 9
>>>> T: 2 ( 2690) P:78 I: 1005000 C: 60 Min: 0 Act: 2
>>>> Avg: 0 Max: 11
>>>> T: 3 ( 2691) P:77 I: 1505000 C: 40 Min: 0 Act: 2
>>>> Avg: 0 Max: 13
>>>> T: 4 ( 2692) P:76 I: 2005000 C: 30 Min: 0 Act: 0
>>>> Avg: 0 Max: 15
>>>> T: 5 ( 2693) P:75 I: 2505000 C: 24 Min: 0 Act: 0
>>>> Avg: 0 Max: 16
>>>> T: 6 ( 2694) P:74 I: 3005000 C: 20 Min: 0 Act: 0
>>>> Avg: 0 Max: 19
>>>> T: 7 ( 2695) P:73 I: 3505000 C: 18 Min: 0 Act: 0
>>>> Avg: 1 Max: 21
>>>> T: 8 ( 2696) P:72 I: 4005000 C: 16 Min: 0 Act: 0
>>>> Avg: 1 Max: 23
>>>> T: 9 ( 2697) P:71 I: 4505000 C: 14 Min: 0 Act: 0
>>>> Avg: 2 Max: 24
>>>> T:10 ( 2698) P:70 I: 5005000 C: 12 Min: 0 Act: 2
>>>> Avg: 2 Max: 26
>>>> T:11 ( 2699) P:69 I: 5505000 C: 12 Min: 0 Act: 2
>>>> Avg: 2 Max: 28
>>>> T:12 ( 2700) P:68 I: 6005000 C: 10 Min: 0 Act: 0
>>>> Avg: 3 Max: 30
>>>> T:13 ( 2701) P:67 I: 6505000 C: 10 Min: 1 Act: 1
>>>> Avg: 3 Max: 32
>>>> T:14 ( 2702) P:66 I: 7005000 C: 10 Min: 0 Act: 0
>>>> Avg: 3 Max: 34
>>>> T:15 ( 2703) P:65 I: 7505000 C: 8 Min: 0 Act: 2
>>>> Avg: 4 Max: 36
>>>> T:16 ( 2704) P:64 I: 8005000 C: 8 Min: 0 Act: 1
>>>> Avg: 5 Max: 38
>>>> T:17 ( 2705) P:63 I: 8505000 C: 8 Min: 0 Act: 1
>>>> Avg: 5 Max: 40
>>>> T:18 ( 2706) P:62 I: 9005000 C: 8 Min: 0 Act: 0
>>>> Avg: 5 Max: 42
>>>> T:19 ( 2707) P:61 I: 9505000 C: 8 Min: 0 Act: 0
>>>> Avg: 5 Max: 44
>>>> T:20 ( 2708) P:60 I:10005000 C: 6 Min: 3 Act: 3
>>>> Avg: 8 Max: 46
>>>>
>>>> This never stops, T0 completes quickly but not others
>>>>
>>>>
>>>>
>> ------------------------------------------------------------------------------------------------
>>>> Linux Madan 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15
>> 03:51:20
>>>> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
>>>>
>>>> root@Madan:/home/mymo/MADAN_Xeno/rt-tests# ./cyclictest -t 21 -p 80 -i
>>>> 5000 -l 5000
>>>> # /dev/cpu_dma_latency set to 0us
>>>> policy: fifo: loadavg: 14.44 5.11 1.85 20/444 2835
>>>>
>>>> T: 0 ( 2815) P:80 I:5000 C: 5000 Min: 2 Act: 3 Avg: 3
>>>> Max: 18
>>>> T: 1 ( 2816) P:80 I:5500 C: 4541 Min: 2 Act: 3 Avg: 3
>>>> Max: 21
>>>> T: 2 ( 2817) P:80 I:6000 C: 4163 Min: 2 Act: 3 Avg: 3
>>>> Max: 315
>>>> T: 3 ( 2818) P:80 I:6500 C: 3843 Min: 2 Act: 3 Avg: 3
>>>> Max: 12
>>>> T: 4 ( 2819) P:80 I:7000 C: 3568 Min: 2 Act: 2 Avg: 3
>>>> Max: 20
>>>> T: 5 ( 2820) P:80 I:7500 C: 3330 Min: 2 Act: 3 Avg: 3
>>>> Max: 14
>>>> T: 6 ( 2821) P:80 I:8000 C: 3122 Min: 2 Act: 3 Avg: 3
>>>> Max: 366
>>>> T: 7 ( 2822) P:80 I:8500 C: 2938 Min: 2 Act: 3 Avg: 3
>>>> Max: 11
>>>> T: 8 ( 2823) P:80 I:9000 C: 2775 Min: 2 Act: 3 Avg: 3
>>>> Max: 15
>>>> T: 9 ( 2824) P:80 I:9500 C: 2629 Min: 2 Act: 3 Avg: 3
>>>> Max: 28
>>>> T:10 ( 2825) P:80 I:10000 C: 2497 Min: 2 Act: 2 Avg: 3
>>>> Max: 15
>>>> T:11 ( 2826) P:80 I:10500 C: 2379 Min: 2 Act: 2 Avg: 3
>>>> Max: 13
>>>> T:12 ( 2827) P:80 I:11000 C: 2270 Min: 2 Act: 4 Avg: 3
>>>> Max: 14
>>>> T:13 ( 2828) P:80 I:11500 C: 2172 Min: 2 Act: 3 Avg: 3
>>>> Max: 15
>>>> T:14 ( 2829) P:80 I:12000 C: 2081 Min: 2 Act: 3 Avg: 4
>>>> Max: 469
>>>> T:15 ( 2830) P:80 I:12500 C: 1998 Min: 2 Act: 2 Avg: 3
>>>> Max: 15
>>>> T:16 ( 2831) P:80 I:13000 C: 1921 Min: 2 Act: 3 Avg: 3
>>>> Max: 30
>>>> T:17 ( 2832) P:80 I:13500 C: 1850 Min: 2 Act: 3 Avg: 3
>>>> Max: 14
>>>> T:18 ( 2833) P:80 I:14000 C: 1784 Min: 2 Act: 3 Avg: 3
>>>> Max: 15
>>>> T:19 ( 2834) P:80 I:14500 C: 1722 Min: 2 Act: 3 Avg: 3
>>>> Max: 13
>>>> T:20 ( 2835) P:80 I:15000 C: 1665 Min: 2 Act: 2 Avg: 3
>>>> Max: 11
>>>>
>>>>
>>>>
>>>> Thanks
>>>>
>>>> M
>>>>
>>
>>
>>
>>
>
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Xenomai] CyclicTest query on Xenomai
2015-06-30 5:40 ` Jan Kiszka
@ 2015-06-30 10:45 ` Madan Sondur
2015-06-30 10:54 ` Jan Kiszka
0 siblings, 1 reply; 8+ messages in thread
From: Madan Sondur @ 2015-06-30 10:45 UTC (permalink / raw)
To: Jan Kiszka; +Cc: xenomai
On Tue, Jun 30, 2015 at 11:10 AM, Jan Kiszka <jan.kiszka@web.de> wrote:
> Please don't top-post.
>
> On 2015-06-30 05:34, Madan Sondur wrote:
> > I stress tested the system for an hour using Pi-stress and pumping huge
> > amount of data through usb3.0 and I perf at network. What I have
> observed
> > is cyclictest from usr/xenomai/bin behaves differently, only the first
> > thread completes then after all the other threads execute very slowly,
> you
> > can see the count value.
> >
> > But the cyclictest that was downloaded from net completes all the threads
> > and exits.
> >
> > The results of sample tests for 5000 loops are as shown.
> >
> > Xenomai cyclictest T1 count is 120, where as cyclictest which is from net
> > has T1 count of 4546.
> >
> > Why is this behaviour?
>
> Xenomai uses different interval spreading than rt-test, see your
> outputs. There is probably a bug in the Xenomai version of cyclictest,
> getting some order of magnitude wrong with the default settings. Should
> be easy to fix.
>
Can you tell me what are the default settings for fixing this ?
>
> The fact that you see over 300 µs worst-case latencies with vanilla
> cyclictest on a standard kernel and that you don't get this with the
> same test program over a Xenomai kernel, indicates that your test method
> was not correct, e.g. that load was affecting only the other cores.
> Xenomai does not improve the latencies of normal applications.
>
How do you say the vanilla cyclictest should not perform better in xenomai
kernel than in standard kernel ?,
vanilla cyclictest is using posix calls which xenomai supports (posix api
interface) for hard real time.
All the cores are shot up to 100% with pi_stress. only the first core was
around 90% for traffic handling in usb 3.0 and Ethernet.
i don't think Vanilla cyclictest is a normal application.
Thx
M
>
> Jan
>
> >
> > Thx
> > M
> > On 29-Jun-2015 11:55 am, "Jan Kiszka" <jan.kiszka@web.de> wrote:
> >
> >> On 2015-06-29 07:33, Madan Sondur wrote:
> >>> Hi,
> >>> Any inputs will be greatly appreciated,
> >>
> >> Apply proper load on Linux (e.g. via xeno-test) and run the tests over a
> >> much longer period to get relevant results.
> >>
> >> Jan
> >>
> >>>
> >>> Thanks
> >>> M
> >>>
> >>> On Fri, Jun 26, 2015 at 11:46 AM, Madan Sondur <
> sondur.madan23@gmail.com
> >>>
> >>> wrote:
> >>>
> >>>> Hi ,
> >>>>
> >>>> I have installed Xenomai 2.6.4 on Ubuntu 12.04 64 bit.
> >>>>
> >>>> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
> >>>> x86_64 x86_64 x86_64 GNU/Linux
> >>>>
> >>>> After successfull installation, i am getting varied results with
> >>>> cyclictest present in /usr/xenomai/bin folder and the one in the
> >> rt-tests
> >>>> which i downloaded.
> >>>>
> >>>> pi_stress is used in background to stress the system.
> >>>>
> >>>> Xenomai cyclictest takes a lot of time to complete other threads,
> where
> >> as
> >>>> the first one completes quickly. This is exactly the opposite if i run
> >> the
> >>>> cyclictest, first thread completes and the test stops.
> >>>>
> >>>> 1) is my observation correct? I may be missing some understanding
> here.?
> >>>>
> >>>> 2) This is done in Core i7, the difference in latencies with and
> without
> >>>> xenomai are noticeable but not significant, Is this correct ?
> >>>>
> >>>> 3) I trying to have Hard real time System with minimal latencies ?
> >>>>
> >>>> Below are output results.
> >>>>
> >>>> Can you please help.
> >>>>
> >>>>
> >>>>
> >>
> ------------------------------------------------------------------------------------------------
> >>>> Linux Madan 3.8.13-xenomai-2.6.4 #2 SMP Wed Jun 24 11:22:01 IST 2015
> >>>> x86_64 x86_64 x86_64 GNU/Linux
> >>>>
> >>>> root@Madan:/usr/xenomai/bin#/home/mymo/MADAN_Xeno/rt-tests/cyclictest
> >> -t
> >>>> 21 -p 80 -i 5000 -l 5000
> >>>> # /dev/cpu_dma_latency set to 0us
> >>>> policy: fifo: loadavg: 0.00 0.01 0.01 1/405 2756
> >>>>
> >>>> T: 0 ( 2736) P:80 I:5000 C: 5000 Min: 2 Act: 5 Avg: 3
> >>>> Max: 24
> >>>> T: 1 ( 2737) P:80 I:5500 C: 4546 Min: 1 Act: 2 Avg: 2
> >>>> Max: 18
> >>>> T: 2 ( 2738) P:80 I:6000 C: 4167 Min: 2 Act: 2 Avg: 2
> >>>> Max: 26
> >>>> T: 3 ( 2739) P:80 I:6500 C: 3847 Min: 1 Act: 2 Avg: 2
> >>>> Max: 20
> >>>> T: 4 ( 2740) P:80 I:7000 C: 3572 Min: 1 Act: 3 Avg: 2
> >>>> Max: 16
> >>>> T: 5 ( 2741) P:80 I:7500 C: 3334 Min: 2 Act: 2 Avg: 2
> >>>> Max: 20
> >>>> T: 6 ( 2742) P:80 I:8000 C: 3125 Min: 1 Act: 4 Avg: 2
> >>>> Max: 21
> >>>> T: 7 ( 2743) P:80 I:8500 C: 2942 Min: 1 Act: 2 Avg: 3
> >>>> Max: 18
> >>>> T: 8 ( 2744) P:80 I:9000 C: 2778 Min: 1 Act: 3 Avg: 2
> >>>> Max: 16
> >>>> T: 9 ( 2745) P:80 I:9500 C: 2632 Min: 1 Act: 3 Avg: 2
> >>>> Max: 13
> >>>> T:10 ( 2746) P:80 I:10000 C: 2500 Min: 2 Act: 3 Avg: 2
> >>>> Max: 26
> >>>> T:11 ( 2747) P:80 I:10500 C: 2381 Min: 1 Act: 3 Avg: 2
> >>>> Max: 14
> >>>> T:12 ( 2748) P:80 I:11000 C: 2273 Min: 2 Act: 3 Avg: 2
> >>>> Max: 19
> >>>> T:13 ( 2749) P:80 I:11500 C: 2174 Min: 2 Act: 3 Avg: 2
> >>>> Max: 18
> >>>> T:14 ( 2750) P:80 I:12000 C: 2083 Min: 2 Act: 3 Avg: 2
> >>>> Max: 13
> >>>> T:15 ( 2751) P:80 I:12500 C: 2000 Min: 2 Act: 3 Avg: 2
> >>>> Max: 17
> >>>> T:16 ( 2752) P:80 I:13000 C: 1923 Min: 2 Act: 3 Avg: 2
> >>>> Max: 9
> >>>> T:17 ( 2753) P:80 I:13500 C: 1852 Min: 2 Act: 3 Avg: 3
> >>>> Max: 17
> >>>> T:18 ( 2754) P:80 I:14000 C: 1786 Min: 1 Act: 3 Avg: 2
> >>>> Max: 11
> >>>> T:19 ( 2755) P:80 I:14500 C: 1724 Min: 2 Act: 3 Avg: 3
> >>>> Max: 21
> >>>> T:20 ( 2756) P:80 I:15000 C: 1667 Min: 2 Act: 3 Avg: 2
> >>>> Max: 8
> >>>>
> >>>>
> >>>> root@Madan:/usr/xenomai/bin# ./xeno cyclictest -t 21 -p 80 -i 5000 -l
> >> 5000
> >>>> 0.01 0.01 0.01 1/410 2708
> >>>>
> >>>> T: 0 ( 2688) P:80 I: 5000 C: 5000 Min: -2 Act: -2
> >>>> Avg: 0 Max: 12
> >>>> T: 1 ( 2689) P:79 I: 505000 C: 120 Min: 0 Act: 7
> >>>> Avg: 0 Max: 9
> >>>> T: 2 ( 2690) P:78 I: 1005000 C: 60 Min: 0 Act: 2
> >>>> Avg: 0 Max: 11
> >>>> T: 3 ( 2691) P:77 I: 1505000 C: 40 Min: 0 Act: 2
> >>>> Avg: 0 Max: 13
> >>>> T: 4 ( 2692) P:76 I: 2005000 C: 30 Min: 0 Act: 0
> >>>> Avg: 0 Max: 15
> >>>> T: 5 ( 2693) P:75 I: 2505000 C: 24 Min: 0 Act: 0
> >>>> Avg: 0 Max: 16
> >>>> T: 6 ( 2694) P:74 I: 3005000 C: 20 Min: 0 Act: 0
> >>>> Avg: 0 Max: 19
> >>>> T: 7 ( 2695) P:73 I: 3505000 C: 18 Min: 0 Act: 0
> >>>> Avg: 1 Max: 21
> >>>> T: 8 ( 2696) P:72 I: 4005000 C: 16 Min: 0 Act: 0
> >>>> Avg: 1 Max: 23
> >>>> T: 9 ( 2697) P:71 I: 4505000 C: 14 Min: 0 Act: 0
> >>>> Avg: 2 Max: 24
> >>>> T:10 ( 2698) P:70 I: 5005000 C: 12 Min: 0 Act: 2
> >>>> Avg: 2 Max: 26
> >>>> T:11 ( 2699) P:69 I: 5505000 C: 12 Min: 0 Act: 2
> >>>> Avg: 2 Max: 28
> >>>> T:12 ( 2700) P:68 I: 6005000 C: 10 Min: 0 Act: 0
> >>>> Avg: 3 Max: 30
> >>>> T:13 ( 2701) P:67 I: 6505000 C: 10 Min: 1 Act: 1
> >>>> Avg: 3 Max: 32
> >>>> T:14 ( 2702) P:66 I: 7005000 C: 10 Min: 0 Act: 0
> >>>> Avg: 3 Max: 34
> >>>> T:15 ( 2703) P:65 I: 7505000 C: 8 Min: 0 Act: 2
> >>>> Avg: 4 Max: 36
> >>>> T:16 ( 2704) P:64 I: 8005000 C: 8 Min: 0 Act: 1
> >>>> Avg: 5 Max: 38
> >>>> T:17 ( 2705) P:63 I: 8505000 C: 8 Min: 0 Act: 1
> >>>> Avg: 5 Max: 40
> >>>> T:18 ( 2706) P:62 I: 9005000 C: 8 Min: 0 Act: 0
> >>>> Avg: 5 Max: 42
> >>>> T:19 ( 2707) P:61 I: 9505000 C: 8 Min: 0 Act: 0
> >>>> Avg: 5 Max: 44
> >>>> T:20 ( 2708) P:60 I:10005000 C: 6 Min: 3 Act: 3
> >>>> Avg: 8 Max: 46
> >>>>
> >>>> This never stops, T0 completes quickly but not others
> >>>>
> >>>>
> >>>>
> >>
> ------------------------------------------------------------------------------------------------
> >>>> Linux Madan 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15
> >> 03:51:20
> >>>> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
> >>>>
> >>>> root@Madan:/home/mymo/MADAN_Xeno/rt-tests# ./cyclictest -t 21 -p 80
> -i
> >>>> 5000 -l 5000
> >>>> # /dev/cpu_dma_latency set to 0us
> >>>> policy: fifo: loadavg: 14.44 5.11 1.85 20/444 2835
> >>>>
> >>>> T: 0 ( 2815) P:80 I:5000 C: 5000 Min: 2 Act: 3 Avg: 3
> >>>> Max: 18
> >>>> T: 1 ( 2816) P:80 I:5500 C: 4541 Min: 2 Act: 3 Avg: 3
> >>>> Max: 21
> >>>> T: 2 ( 2817) P:80 I:6000 C: 4163 Min: 2 Act: 3 Avg: 3
> >>>> Max: 315
> >>>> T: 3 ( 2818) P:80 I:6500 C: 3843 Min: 2 Act: 3 Avg: 3
> >>>> Max: 12
> >>>> T: 4 ( 2819) P:80 I:7000 C: 3568 Min: 2 Act: 2 Avg: 3
> >>>> Max: 20
> >>>> T: 5 ( 2820) P:80 I:7500 C: 3330 Min: 2 Act: 3 Avg: 3
> >>>> Max: 14
> >>>> T: 6 ( 2821) P:80 I:8000 C: 3122 Min: 2 Act: 3 Avg: 3
> >>>> Max: 366
> >>>> T: 7 ( 2822) P:80 I:8500 C: 2938 Min: 2 Act: 3 Avg: 3
> >>>> Max: 11
> >>>> T: 8 ( 2823) P:80 I:9000 C: 2775 Min: 2 Act: 3 Avg: 3
> >>>> Max: 15
> >>>> T: 9 ( 2824) P:80 I:9500 C: 2629 Min: 2 Act: 3 Avg: 3
> >>>> Max: 28
> >>>> T:10 ( 2825) P:80 I:10000 C: 2497 Min: 2 Act: 2 Avg: 3
> >>>> Max: 15
> >>>> T:11 ( 2826) P:80 I:10500 C: 2379 Min: 2 Act: 2 Avg: 3
> >>>> Max: 13
> >>>> T:12 ( 2827) P:80 I:11000 C: 2270 Min: 2 Act: 4 Avg: 3
> >>>> Max: 14
> >>>> T:13 ( 2828) P:80 I:11500 C: 2172 Min: 2 Act: 3 Avg: 3
> >>>> Max: 15
> >>>> T:14 ( 2829) P:80 I:12000 C: 2081 Min: 2 Act: 3 Avg: 4
> >>>> Max: 469
> >>>> T:15 ( 2830) P:80 I:12500 C: 1998 Min: 2 Act: 2 Avg: 3
> >>>> Max: 15
> >>>> T:16 ( 2831) P:80 I:13000 C: 1921 Min: 2 Act: 3 Avg: 3
> >>>> Max: 30
> >>>> T:17 ( 2832) P:80 I:13500 C: 1850 Min: 2 Act: 3 Avg: 3
> >>>> Max: 14
> >>>> T:18 ( 2833) P:80 I:14000 C: 1784 Min: 2 Act: 3 Avg: 3
> >>>> Max: 15
> >>>> T:19 ( 2834) P:80 I:14500 C: 1722 Min: 2 Act: 3 Avg: 3
> >>>> Max: 13
> >>>> T:20 ( 2835) P:80 I:15000 C: 1665 Min: 2 Act: 2 Avg: 3
> >>>> Max: 11
> >>>>
> >>>>
> >>>>
> >>>> Thanks
> >>>>
> >>>> M
> >>>>
> >>
> >>
> >>
> >>
> >
>
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Xenomai] CyclicTest query on Xenomai
2015-06-30 10:45 ` Madan Sondur
@ 2015-06-30 10:54 ` Jan Kiszka
2015-06-30 11:10 ` Madan Sondur
0 siblings, 1 reply; 8+ messages in thread
From: Jan Kiszka @ 2015-06-30 10:54 UTC (permalink / raw)
To: Madan Sondur; +Cc: xenomai
On 2015-06-30 12:45, Madan Sondur wrote:
> On Tue, Jun 30, 2015 at 11:10 AM, Jan Kiszka <jan.kiszka@web.de> wrote:
>
>> Please don't top-post.
>>
>> On 2015-06-30 05:34, Madan Sondur wrote:
>>> I stress tested the system for an hour using Pi-stress and pumping huge
>>> amount of data through usb3.0 and I perf at network. What I have
>> observed
>>> is cyclictest from usr/xenomai/bin behaves differently, only the first
>>> thread completes then after all the other threads execute very slowly,
>> you
>>> can see the count value.
>>>
>>> But the cyclictest that was downloaded from net completes all the threads
>>> and exits.
>>>
>>> The results of sample tests for 5000 loops are as shown.
>>>
>>> Xenomai cyclictest T1 count is 120, where as cyclictest which is from net
>>> has T1 count of 4546.
>>>
>>> Why is this behaviour?
>>
>> Xenomai uses different interval spreading than rt-test, see your
>> outputs. There is probably a bug in the Xenomai version of cyclictest,
>> getting some order of magnitude wrong with the default settings. Should
>> be easy to fix.
>>
>
> Can you tell me what are the default settings for fixing this ?
cyclictest -d <distance>
>
>>
>> The fact that you see over 300 µs worst-case latencies with vanilla
>> cyclictest on a standard kernel and that you don't get this with the
>> same test program over a Xenomai kernel, indicates that your test method
>> was not correct, e.g. that load was affecting only the other cores.
>> Xenomai does not improve the latencies of normal applications.
>>
>
>
> How do you say the vanilla cyclictest should not perform better in xenomai
> kernel than in standard kernel ?,
> vanilla cyclictest is using posix calls which xenomai supports (posix api
> interface) for hard real time.
>
> All the cores are shot up to 100% with pi_stress. only the first core was
> around 90% for traffic handling in usb 3.0 and Ethernet.
>
> i don't think Vanilla cyclictest is a normal application.
Did you build the vanilla version against Xenomai libs using the
xeno-config provided parameters? Then the situation could be different.
Jan
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Xenomai] CyclicTest query on Xenomai
2015-06-30 10:54 ` Jan Kiszka
@ 2015-06-30 11:10 ` Madan Sondur
0 siblings, 0 replies; 8+ messages in thread
From: Madan Sondur @ 2015-06-30 11:10 UTC (permalink / raw)
To: Jan Kiszka; +Cc: xenomai
On Tue, Jun 30, 2015 at 4:24 PM, Jan Kiszka <jan.kiszka@web.de> wrote:
> On 2015-06-30 12:45, Madan Sondur wrote:
> > On Tue, Jun 30, 2015 at 11:10 AM, Jan Kiszka <jan.kiszka@web.de> wrote:
> >
> >> Please don't top-post.
> >>
> >> On 2015-06-30 05:34, Madan Sondur wrote:
> >>> I stress tested the system for an hour using Pi-stress and pumping huge
> >>> amount of data through usb3.0 and I perf at network. What I have
> >> observed
> >>> is cyclictest from usr/xenomai/bin behaves differently, only the first
> >>> thread completes then after all the other threads execute very slowly,
> >> you
> >>> can see the count value.
> >>>
> >>> But the cyclictest that was downloaded from net completes all the
> threads
> >>> and exits.
> >>>
> >>> The results of sample tests for 5000 loops are as shown.
> >>>
> >>> Xenomai cyclictest T1 count is 120, where as cyclictest which is from
> net
> >>> has T1 count of 4546.
> >>>
> >>> Why is this behaviour?
> >>
> >> Xenomai uses different interval spreading than rt-test, see your
> >> outputs. There is probably a bug in the Xenomai version of cyclictest,
> >> getting some order of magnitude wrong with the default settings. Should
> >> be easy to fix.
> >>
> >
> > Can you tell me what are the default settings for fixing this ?
>
> cyclictest -d <distance>
>
> >
> >>
> >> The fact that you see over 300 µs worst-case latencies with vanilla
> >> cyclictest on a standard kernel and that you don't get this with the
> >> same test program over a Xenomai kernel, indicates that your test method
> >> was not correct, e.g. that load was affecting only the other cores.
> >> Xenomai does not improve the latencies of normal applications.
> >>
> >
> >
> > How do you say the vanilla cyclictest should not perform better in
> xenomai
> > kernel than in standard kernel ?,
> > vanilla cyclictest is using posix calls which xenomai supports (posix
> api
> > interface) for hard real time.
> >
> > All the cores are shot up to 100% with pi_stress. only the first core was
> > around 90% for traffic handling in usb 3.0 and Ethernet.
> >
> > i don't think Vanilla cyclictest is a normal application.
>
> Did you build the vanilla version against Xenomai libs using the
> xeno-config provided parameters? Then the situation could be different.
>
Wow i missed this, ( can't imagine, silly me ), I will try compiling with
Xeno-config. I never tried this as this
is the first time i am exploring. If you can point me to any useful
guides/examples, would be very helpful
Thx for your time
M
>
> Jan
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2015-06-30 11:10 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-06-26 6:16 [Xenomai] CyclicTest query on Xenomai Madan Sondur
2015-06-29 5:33 ` Madan Sondur
2015-06-29 6:25 ` Jan Kiszka
2015-06-30 3:34 ` Madan Sondur
2015-06-30 5:40 ` Jan Kiszka
2015-06-30 10:45 ` Madan Sondur
2015-06-30 10:54 ` Jan Kiszka
2015-06-30 11:10 ` Madan Sondur
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