[Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Anisha Kaul]

Greetings,

The hackbench command I issued is as follows: _______________________________

/usr/xenomai/bin/xeno-test -l "dohell -b ./hackbench -pipe 100 process 100"

The end result of the same was:
_______________________________
...
Started child 8805: dohell -b ./hackbench -pipe 100 process 100
Started child 8806: /usr/xenomai/bin/latency
/usr/xenomai/bin/dohell [ -b path ] [ -s server ] [ -p port ] [ -m
mntpoint ] [ -l path | seconds ]

Generate load, using an assorted set of commands and optionnaly:
- hackbench if the path to the hackbench binary is specified with -b;
- nc to send TCP data to "server" port "port" if -s is specified (if -p
is not specified, the port 9, aka discard is used);
- dd to write data under "mntpoint" if -m is specified.

during the runtime of the LTP test if the path to the LTP installation
directory is specifed with -l or during "seconds" seconds.
== Sampling period: 100 us
== Test mode: periodic user-mode task
== All results in microseconds
warming up...
Load script terminated, terminating checked scripts
---|-----------|-----------|-----------|--------|------|-------------------------
RTS|   3574.877|      0.000|  -3574.878|       0|     0|    00:00:-01/00:00:-01

_______________________________

The last `Residual Time Stamp` table doesn't have the headings. How do
I know what do each of the numbers represent?
Secondly, does `hackbench` when run along with xeno-test runs all its
processes within the "real time"?


Please guide.
-Anisha

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Gilles Chanteperdrix]

On 04/17/2012 01:11 PM, Anisha Kaul wrote:
> Greetings,
> 
> The hackbench command I issued is as follows: _______________________________
> 
> /usr/xenomai/bin/xeno-test -l "dohell -b ./hackbench -pipe 100 process 100"

You do not use dohell properly. The syntax for running dohell is
detailed below

> /usr/xenomai/bin/dohell [ -b path ] [ -s server ] [ -p port ] [ -m
> mntpoint ] [ -l path | seconds ]
> 
> Generate load, using an assorted set of commands and optionnaly:
> - hackbench if the path to the hackbench binary is specified with -b;
> - nc to send TCP data to "server" port "port" if -s is specified (if -p
> is not specified, the port 9, aka discard is used);
> - dd to write data under "mntpoint" if -m is specified.
> 
> during the runtime of the LTP test if the path to the LTP installation
> directory is specifed with -l or during "seconds" seconds.

-- 
                                                                Gilles.

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Gilles Chanteperdrix]

On 04/17/2012 01:30 PM, Gilles Chanteperdrix wrote:
> On 04/17/2012 01:11 PM, Anisha Kaul wrote:
>> Greetings,
>>
>> The hackbench command I issued is as follows: _______________________________
>>
>> /usr/xenomai/bin/xeno-test -l "dohell -b ./hackbench -pipe 100 process 100"
> 
> You do not use dohell properly. The syntax for running dohell is
> detailed below
> 
>> /usr/xenomai/bin/dohell [ -b path ] [ -s server ] [ -p port ] [ -m
>> mntpoint ] [ -l path | seconds ]
>>
>> Generate load, using an assorted set of commands and optionnaly:
>> - hackbench if the path to the hackbench binary is specified with -b;
>> - nc to send TCP data to "server" port "port" if -s is specified (if -p
>> is not specified, the port 9, aka discard is used);
>> - dd to write data under "mntpoint" if -m is specified.
>>
>> during the runtime of the LTP test if the path to the LTP installation
>> directory is specifed with -l or during "seconds" seconds.
> 

Ok, it is not clear: but you need to pass a duration if you do not pass
the patch to LTP, which means either the "-l path" or "seconds" argument
is mandatory.

-- 
                                                                Gilles.

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Anisha Kaul]

On 17 April 2012 17:04, Gilles Chanteperdrix
<gilles.chanteperdrix@xenomai.org> wrote:
> Ok, it is not clear: but you need to pass a duration if you do not pass
> the patch to LTP, which means either the "-l path" or "seconds" argument
> is mandatory.

 Thanks for replying. I couldn't have made it out myself that the last
 argument is compulsory.
 The problem isn't solved yet, actually.

 I tried `dohell` separately with `hackbench` and `seconds` parameter
 as follows (and it worked properly):
 _____________________________________________________________
 linux-dopx:~ # /usr/xenomai/bin/dohell -b
 "/home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
 process 100 seconds" 2
 Running with 100*40 (== 4000) tasks.
 Time: 2.198
 /usr/xenomai/bin/dohell: line 94: 17276 Terminated              while :; do
    $hackbench 1;
 done
 /usr/xenomai/bin/dohell: line 94: 17277 Terminated              while :; do
    cat /proc/interrupts;
 done > /dev/null 2>&1
 /usr/xenomai/bin/dohell: line 94: 17279 Terminated              while :; do
    ps w;
 done > /dev/null 2>&1
 /usr/xenomai/bin/dohell: line 94: 17280 Terminated              dd
 if=/dev/zero of=/dev/null
 /usr/xenomai/bin/dohell: line 94: 17281 Terminated              while :; do
    ls -lR / > /dev/null 2>&1;
 done
 Killed
 _____________________________________________________________

 Then I tried the same with `xeno-test` as follows:

 _____________________________________________________________
> /usr/xenomai/bin/xeno-test -l "dohell -b
> "/home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
> process 100 seconds" 2"
> and
> /usr/xenomai/bin/xeno-test -l "dohell -b
> /home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
> process 100 seconds 2"
> and
> /usr/xenomai/bin/xeno-test -l dohell -b
> /home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
> process 100 seconds 2
> and also,
> /usr/xenomai/bin/xeno-test -l "dohell -b
> /home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
> process 100" -T 2
> and
> /usr/xenomai/bin/xeno-test -l "dohell -b
> /home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
> process 100" -t 2
> _____________________________________________________________



 All of them resulted in the following end results:
 What is the way to run this? Please help.


 _____________________________________________________________
 Started child 21470: /usr/xenomai/bin/latency
 /usr/xenomai/bin/dohell [ -b path ] [ -s server ] [ -p port ] [ -m
 mntpoint ] [ -l path | seconds ]

 Generate load, using an assorted set of commands and optionnaly:
 - hackbench if the path to the hackbench binary is specified with -b;
 - nc to send TCP data to "server" port "port" if -s is specified (if -p
 is not specified, the port 9, aka discard is used);
 - dd to write data under "mntpoint" if -m is specified.

 during the runtime of the LTP test if the path to the LTP installation
 directory is specifed with -l or during "seconds" seconds.
 == Sampling period: 100 us
 == Test mode: periodic user-mode task
 == All results in microseconds
 warming up...
 Load script terminated, terminating checked scripts
 ---|-----------|-----------|-----------|--------|------|-------------------------
 RTS|   3574.296|      0.000|  -3574.297|       0|     0|    00:00:-01/00:00:-01
 _____________________________________________________________



 -Anisha

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Gilles Chanteperdrix]

On 04/18/2012 09:25 AM, Anisha Kaul wrote:
> On 17 April 2012 17:04, Gilles Chanteperdrix
> <gilles.chanteperdrix@xenomai.org> wrote:
>> Ok, it is not clear: but you need to pass a duration if you do not pass
>> the patch to LTP, which means either the "-l path" or "seconds" argument
>> is mandatory.
> 
>  Thanks for replying. I couldn't have made it out myself that the last
>  argument is compulsory.
>  The problem isn't solved yet, actually.
> 
>  I tried `dohell` separately with `hackbench` and `seconds` parameter
>  as follows (and it worked properly):

Try:
xeno-test -l "dohell -b
/home/anisha/Desktop/RealTime/downloadedPages/hackbench 14400"

-- 
                                                                Gilles.

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Anisha Kaul]

On 18 April 2012 13:59, Gilles Chanteperdrix
<gilles.chanteperdrix@xenomai.org> wrote:
>> I tried `dohell` separately with `hackbench` and `seconds` parameter
>> as follows (and it worked properly):
>> _____________________________________________________________
>> linux-dopx:~ # /usr/xenomai/bin/dohell -b
>> "/home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
>> process 100 seconds" 2
>
> "seconds" is a count of seconds, the number of seconds you want dohell
> to run. Like 14400 for 4 hours.
>


Yes, I understood that. I did mention 2 as number of seconds (in the
above quoted command), and I also tried that as follows:
/usr/xenomai/bin/dohell -b
"/home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
process 100" 2

This `dohell` command result too is showing the proper output.

The problem is that when I run the same dohell command with xeno-test,
it doesn't show the results of hackbench.
Please read the other commands I tried (in my previous mail).

I feel it is the syntax problem which I am not able to figure out.


-Anisha

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Anisha Kaul]

On 18 April 2012 14:11, Gilles Chanteperdrix
<gilles.chanteperdrix@xenomai.org> wrote:
> Try: xeno-test -l "dohell -b /home/anisha/Desktop/RealTime/downloadedPages/hackbench 14400"

and that worked! I tried it with 2 seconds.

I realize now that the problem is in the "parameters" which I specify
with hackbench:

xeno-test -l "dohell -b
/home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
process 100 2"

The sub `dohell` command (with hackbench parameters) work well, but it
doesn't work when attached with `xeno-test`. I remove the hackbench's
parameters ("-pipe 100 process 100"), then it starts working.

Thanks for your help, but what should I do if I want those parameters?
Hardcoding them in the hackbench's code as a temporary solution? Or I
am still missing a point?

-Anisha

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Gilles Chanteperdrix]

On 04/18/2012 11:09 AM, Anisha Kaul wrote:
> On 18 April 2012 14:11, Gilles Chanteperdrix
> <gilles.chanteperdrix@xenomai.org> wrote:
>> Try: xeno-test -l "dohell -b /home/anisha/Desktop/RealTime/downloadedPages/hackbench 14400"
> 
> and that worked! I tried it with 2 seconds.

You will not obtain the worst case latencies by running the test for 2
seconds, you have to let xeno-test run at least a few hours.

> 
> I realize now that the problem is in the "parameters" which I specify
> with hackbench:
> 
> xeno-test -l "dohell -b
> /home/anisha/Desktop/RealTime/downloadedPages/hackbench -pipe 100
> process 100 2"
> 
> The sub `dohell` command (with hackbench parameters) work well, but it
> doesn't work when attached with `xeno-test`. I remove the hackbench's
> parameters ("-pipe 100 process 100"), then it starts working.
> 
> Thanks for your help, but what should I do if I want those parameters?
> Hardcoding them in the hackbench's code as a temporary solution? Or I
> am still missing a point?

As of now, the simplest way is to hardcode them in the dohell script.

-- 
					    Gilles.

Re: [Xenomai-help] Understanding the output of hackbench when run together with xeno-test

[Anisha Kaul]

> You will not obtain the worst case latencies by running the test for 2
> seconds, you have to let xeno-test run at least a few hours.

Will keep that in mind.
Thanks for all your patience Gilles.

-Anisha