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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
@ 2020-03-24 17:42 ` Toke Høiland-Jørgensen
  2020-03-26 14:54 ` Toke Høiland-Jørgensen
                   ` (19 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-03-24 17:42 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Subscribed


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olg33 <notifications@github.com> writes:

> Hi,
>
> I just received from a a colleague that is no longer with us a
> customized test file (.conf) to run bandwidth tests with DSCP marks
> for different types of services. It worked fine in his VM (Ubuntu
> 18.06). Now, once I imported the same file on directory
> /usr/share/flent/flent/tests of my VM and run the test, it displays
> the following alarm:
>
>> ERROR: Unable to load JSON from 'FILE_NAME.conf' : Expecting value:
>line 1 column 1 (char 0)

This indicates that it's trying to load the test file as a data file.
Are you passing the full test filename to Flent? You should just use the
test name (without the .conf part) and it should pick up the file.

Also, note that Flent now lets you specify per-flow DSCP marks as test
parameters when you launch a test, so your custom file may not be needed
anymore. If it is, though, I'll be happy to consider it for inclusion
into the repository (if it's at least minimally applicable outside of
your environment).



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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
  2020-03-24 17:42 ` [Flent-users] [tohojo/flent] Customized test displaying error (#203) Toke Høiland-Jørgensen
@ 2020-03-26 14:54 ` Toke Høiland-Jørgensen
  2020-03-26 17:59 ` Toke Høiland-Jørgensen
                   ` (18 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-03-26 14:54 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Subscribed


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olg33 <notifications@github.com> writes:

> Thanks Tohojo,
>
> That was indeed the problem BUT, now I'm getting the following:
>
>> ERROR: Unable to read the test config file
>> '/usr/share/flent/flent/tests/TEST1.conf': 'name 'find_netperf' is
>> not defined'
>
> Please note that this time I only typed the name of the test without
> the ,conf extension .

Yeah, this looks like it's a matter of the internal test configuration
API having changed...

> On the other hand, I'm definitively interested in trying the new
> per-flow DSCP marks feature in flent,
>
> I'm aiming at being able to run bandwidth tests where we can create
> marked traffic, something like:
>
> Traffic Class     DSCP Marking
>
> Web Browsing  ------> 11
> Streaming -----------> 13
> Instant Messaging  --->15
> Collaboration ------->  17 
> File transfer   --------> 19
> Default  -------------> 10
> Scavenger  ---------->   1
>
> Do you believe that could be possible? if so, what could be the
> additional parameters required to, let say, run a ruul test creating
> traffic with different marks.

To do this you could do something like this:

flent tcp_nup --test-parameter upload_streams=7 --test-parameter markings=11,13,15,17,19,10,1

However, this currently only works with tcp_nup and tcp_ndown; there's
currently no support in any of the RRUL tests. I can add an rrul_var
test where you can specify number of streams, and parameters such as
markings for each one (matching them so there will be one stream in each
direction + a UDP measurement stream for each setting). Would that work
for your use case, do you think?


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
  2020-03-24 17:42 ` [Flent-users] [tohojo/flent] Customized test displaying error (#203) Toke Høiland-Jørgensen
  2020-03-26 14:54 ` Toke Høiland-Jørgensen
@ 2020-03-26 17:59 ` Toke Høiland-Jørgensen
  2020-03-31 14:15 ` Toke Høiland-Jørgensen
                   ` (17 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-03-26 17:59 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Subscribed


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olg33 <notifications@github.com> writes:

> Hi Tohojo,
>
> Do yo believe that this proposed rrul_var test will be able to
> saturate the link? The main purpose of our testing is to know how much
> bandwidth we can pull in a single link, so far the rrul test has made
> a good job.

Sure, it'll be just like the regular RRUL test, except you can
dynamically specify how many flows you want, and how each should be
marked. I'll see if I can't get this prototyped soonish :)


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (2 preceding siblings ...)
  2020-03-26 17:59 ` Toke Høiland-Jørgensen
@ 2020-03-31 14:15 ` Toke Høiland-Jørgensen
  2020-04-01 10:09 ` Toke Høiland-Jørgensen
                   ` (16 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-03-31 14:15 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Subscribed


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Sorry for the delay in getting to this. Please see if the rrul_var test introduced in d06e0b62608e4947c2d6ee8f7088631f70203d82 solves this for you.

Specifically, you should be able to run this:

`flent rrul_var --test-parameter bidir_streams=7 --test-parameter markings=11,13,15,17,19,10,1`

to get what you're after :)

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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (3 preceding siblings ...)
  2020-03-31 14:15 ` Toke Høiland-Jørgensen
@ 2020-04-01 10:09 ` Toke Høiland-Jørgensen
  2020-04-01 10:33   ` Sebastian Moeller
  2020-04-01 11:10 ` Toke Høiland-Jørgensen
                   ` (15 subsequent siblings)
  20 siblings, 1 reply; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-01 10:09 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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flent-users <notifications@github.com> writes:

> Hi Toke,
>
> that sounds great!
> Question: Are the marking parameters in decimal? So can I for example
> just take the decimal values from
> https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/qos/configuration/guide/n1000v_qos/n1000v_qos_6dscpval.html
> or related tables?

I'd actually suggest you just use the symbolic values (e.g., 'CS0').
Flent will make sure to convert them to decimal values for the tools
that don't understand the symbolic ones. This is the list of supported
symbolic values:

https://github.com/tohojo/flent/blob/master/flent/runners.py#L105

You'll notice the values differ slightly from what's in that Cisco
table, but that's just because the values Flent uses are for the whole
TOS field; so if you bitshift them two bits to the right, they match the
table you referenced :)


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
  2020-04-01 10:09 ` Toke Høiland-Jørgensen
@ 2020-04-01 10:33   ` Sebastian Moeller
  0 siblings, 0 replies; 22+ messages in thread
From: Sebastian Moeller @ 2020-04-01 10:33 UTC (permalink / raw)
  To: tohojo/flent; +Cc: tohojo/flent, Comment, flent-users

Hi Toke,


> On Apr 1, 2020, at 12:09, Toke Høiland-Jørgensen <notifications@github.com> wrote:
> 
> 
> flent-users <notifications@github.com> writes:
> 
> > Hi Toke,
> >
> > that sounds great!
> > Question: Are the marking parameters in decimal? So can I for example
> > just take the decimal values from
> > https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/qos/configuration/guide/n1000v_qos/n1000v_qos_6dscpval.html
> > or related tables?
> 
> I'd actually suggest you just use the symbolic values (e.g., 'CS0').

	Probably decent advise for RFC endorsed named DSCPs, but I want to try a all 6bit DSCP variant at one point in time and hence need numerical inputs as well.

> Flent will make sure to convert them to decimal values for the tools
> that don't understand the symbolic ones. This is the list of supported
> symbolic values:
> 
> https://github.com/tohojo/flent/blob/master/flent/runners.py#L105

	Ah, I guess that list could be extended and that you take patches?

> 
> You'll notice the values differ slightly from what's in that Cisco
> table, but that's just because the values Flent uses are for the whole
> TOS field; so if you bitshift them two bits to the right, they match the
> table you referenced :)

	Ah, fair enough, all I need to know which convention is used ;)

Best Regards
	Sebastian


> —
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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (4 preceding siblings ...)
  2020-04-01 10:09 ` Toke Høiland-Jørgensen
@ 2020-04-01 11:10 ` Toke Høiland-Jørgensen
  2020-04-03  8:30 ` Toke Høiland-Jørgensen
                   ` (14 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-01 11:10 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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flent-users <notifications@github.com> writes:\r
\r
> Hi Toke,\r
>\r
>\r
>> On Apr 1, 2020, at 12:09, Toke Høiland-Jørgensen <notifications@github.com> wrote:\r
>> \r
>> \r
>> flent-users <notifications@github.com> writes:\r
>> \r
>> > Hi Toke,\r
>> >\r
>> > that sounds great!\r
>> > Question: Are the marking parameters in decimal? So can I for example\r
>> > just take the decimal values from\r
>> > https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/qos/configuration/guide/n1000v_qos/n1000v_qos_6dscpval.html\r
>> > or related tables?\r
>> \r
>> I'd actually suggest you just use the symbolic values (e.g., 'CS0').\r
>\r
> 	Probably decent advise for RFC endorsed named DSCPs, but I want\r
> 	to try a all 6bit DSCP variant at one point in time and hence\r
> 	need numerical inputs as well.\r
\r
Right. Well, in that case I think probably the safest is to use\r
hexadecimal values prefixed with 0x. Netperf seems to want that at\r
least, and irtt will take both...\r
\r
>> Flent will make sure to convert them to decimal values for the tools\r
>> that don't understand the symbolic ones. This is the list of supported\r
>> symbolic values:\r
>> \r
>> https://github.com/tohojo/flent/blob/master/flent/runners.py#L105\r
>\r
> 	Ah, I guess that list could be extended and that you take patches?\r
\r
Sure.\r
\r
\r
-- \r
You are receiving this because you commented.\r
Reply to this email directly or view it on GitHub:\r
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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (5 preceding siblings ...)
  2020-04-01 11:10 ` Toke Høiland-Jørgensen
@ 2020-04-03  8:30 ` Toke Høiland-Jørgensen
       [not found] ` <tohojo/flent/issues/203/608963421@github.com>
                   ` (13 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-03  8:30 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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olg33 <notifications@github.com> writes:

> Hi Tohojo,
> Sorry I was also busy. Let me tell what I did: 
>
> First I copied the new rrul_var.conf test file you created in my local directory /usr/share/flent/flent/tests
> Then I typed:
>> flent rrul_var --test-parameter bidir_streams=7 --test-parameter markings=11,13,15,17,19,10,1 -H 172.11.85.2
>
> But after that, I get the following alarm:
>
>>ERROR: Unable to read test config file '/usr/share/flent/flent/tests/rrul_var.conf': 'get_test_parameter() got an unexpected keyword argument 'cast''.
>
> Am I missing any step on adding the new test? Below is the version I'm using:
>
>>Flent v1.2.2.
> Running on Python 3.6.9 (default, Nov  7 2019, 10:44:02)  [GCC 8.3.0].
> Using matplotlib version 2.1.1 on numpy 1.13.3.
> Using PyQt5 version 5.10.1.

You'll need to use the git version of Flent. If you clone the repository
you can either run 'sudo make install' to install it into the system, or
just use the run-flent script directly in the directory with the Flent
source...


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] ` <tohojo/flent/issues/203/608963421@github.com>
@ 2020-04-04  3:25   ` Dave Taht
  0 siblings, 0 replies; 22+ messages in thread
From: Dave Taht @ 2020-04-04  3:25 UTC (permalink / raw)
  To: tohojo/flent; +Cc: tohojo/flent, Comment, flent-users


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sudo python3 setup.py install
or
make install

flent is actually measuring rate differences, it does not actually assign
bandwidth. So your result - where the first flow grabs more bandwidth than
the others, is an artifact of your queuing (probably fifo and tcp cubic).
The first flow wins. In the case where you have a delay based tcp, the last
flow usually wins. In the case of a good AQM, all flows converge to a good,
roughly equal rate in rapid order.

Summary statistics are not a very useful way of looking at tcp behaviors
over time.

for more details on what's going on in the tcp stack, on linux, the tcp_nup
test can be revealing. This will capture internal tcp stats on this test.

flent -H wherever -t whatever --te=upload_streams=4 --socket-stats
--step-size .04 tcp_nup

On Fri, Apr 3, 2020 at 8:12 PM olg33 <notifications@github.com> wrote:

> Thanks Tohojo,
>
> I just cloned the repository and ran Flent using the run-Flent script.
> It's awesome! I tested several scenarios and in all cases it worked as
> expected. I just Have a question, how is the bandwidth assigned to each
> marked data stream? for instance, in one test I got the following bandwidth
> for these TCP streams:
>
> TCP download::0 (11) : 85.08 86.78 Mbits/s
> TCP download::1 (15) : 52.73 53.28 Mbits/s
> TCP download::1 (10) : 57.78 58.45 Mbits/s
>
> Are these values 86.78Mb/s, 53.28Mb/s and 58.45 Mb/s assigned ramdomly?
> What's the criteria to distribute the bandwitdth this way? or, can it be
> assigned via parameter, like a percentage of the total bandwidth available?
>
> Finally, I'd like to properly install the cloned version of Flent via
> "make install". Normally there is an autogen.sh and/or a configure script
> we run before proceeding with the compilation and file creation -make
> install- but I can't find these files in the cloned file system. Could you
> tell me where to find these files or if they have a different name?
>
> Thank you so much for all your kind help.
>
> —
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-- 
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Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-435-0729

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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (7 preceding siblings ...)
       [not found] ` <tohojo/flent/issues/203/608963421@github.com>
@ 2020-04-06  9:22 ` Toke Høiland-Jørgensen
  2020-04-08 21:31 ` Toke Høiland-Jørgensen
                   ` (11 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-06  9:22 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


[-- Attachment #1.1: Type: text/plain, Size: 1709 bytes --]

olg33 <notifications@github.com> writes:

> Thanks Tohojo,
>
> I just cloned the repository and ran Flent using the run-Flent script.
> It's awesome! I tested several scenarios and in all cases it worked as
> expected. I just Have a question, how is the bandwidth assigned to
> each marked data stream? for instance, in one test I got the following
> bandwidth for these TCP streams:
>
>> TCP download::0 (11)  :   85.08       86.78 Mbits/s  
>     TCP download::1 (15) :    52.73       53.28 Mbits/s
>     TCP download::1 (10) :    57.78       58.45 Mbits/s
>
> Are these values 86.78Mb/s, 53.28Mb/s and 58.45 Mb/s assigned
> ramdomly? What's the criteria to distribute the bandwitdth this way?
> or, can it be assigned via parameter, like a percentage of the total
> bandwidth available?

Flent doesn't "assign bandwidth" in any way. Each flow is just a TCP
connection that will try to grab available bandwidth according to its
congestion control behaviour. The actual distribution of bandwidth
between the flows can vary based on a number of parameters, including
network characteristics, flow startup order, etc...

> Finally, I'd like to properly install the cloned version of Flent via
> "make install".  Normally there is an autogen.sh and/or a configure
> script we run before proceeding with the compilation and file creation
> -make install- but I can't find these files in the cloned file system.
> Could you tell me where to find these files or if they have a
> different name?

No need for a configure script, this is Python :)


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (8 preceding siblings ...)
  2020-04-06  9:22 ` Toke Høiland-Jørgensen
@ 2020-04-08 21:31 ` Toke Høiland-Jørgensen
  2020-04-28  9:38 ` Toke Høiland-Jørgensen
                   ` (10 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-08 21:31 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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olg33 <notifications@github.com> writes:

> Thanks Toke and Dave
>
> I have been testing the marking version intensively and as mentioned it's working really well. However I just found that when I put a sniffer and graph the marked TCP streams with Netdata, the Tx flow graph shows the marked data, but on the Rx side the traffic returns unmarked.
>
> In order to double-check I captured packets on both the Tx and Rx interfaces. On the Tx side I was able to see the marks:
>
>> Differentiated Services Field: 0x98 (DSCP: AF43, ECN: Not-ECT)
> Differentiated Services Field: 0x28 (DSCP: AF11, ECN: Not-ECT)
> Differentiated Services Field: 0x88 (DSCP: AF41, ECN: Not-ECT)
> Differentiated Services Field: 0x48 (DSCP: AF21, ECN: Not-ECT)
> Differentiated Services Field: 0x20 (DSCP: CS1, ECN: Not-ECT)
>
> But on Rx, all traffic has the "default" mark:
>
>> Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
> Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
> Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
> Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
> Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
>
> That's why I'd like to ask you, is this an expected outcome or should
> I review my setup?

Are you running these tests over the public internet? It's quite common
for DSCP fields to get zeroed out when traversing the internet...


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (9 preceding siblings ...)
  2020-04-08 21:31 ` Toke Høiland-Jørgensen
@ 2020-04-28  9:38 ` Toke Høiland-Jørgensen
       [not found] ` <tohojo/flent/issues/203/620745795@github.com>
                   ` (9 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
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  To: tohojo/flent; +Cc: Comment, flent-users


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olg33 <notifications@github.com> writes:

> Hi Toke,
> After testing with two co-located servers and tweaking the switch configuration that connects them, all is working well. Thanks.
>
> Now I'd like to test in a production network. Because we work in a multi-vendor environment (Riverbed, Procera, Idirect, etc) we had to create a customized DSCP naming convention which is based on the TOS Hexadecimal value and its DSCP decimal number, something like this:
>
>> https://support.riverbed.com/bin/support/static/n0glmtc5kegfi7htfe7msdsgcb/html/uc6d3bbkbug83sroi75ersdj9i/sc_ug_html/index.html#page/sh_sd/app_tosdscp_qosclass.html
>
>  Therefore, instead of AF11, we use as a name the DSCP number 10 whose hex value would be 0x28. We have a total of 12 DSCP values for our traffic markings. 
>
> I was thinking that perhaps it's a matter of adding these values to the list of supported symbolic values which in our case may look like this:
>
> MARKING_MAP = {'10': 0x28,
>                               '11': 0x2c,
>                               '13': 0x34,
>                               '15': 0x38,
>                               '17': 0x40,
>                               '19': 0x4c,
>                               '20': 0x50,
>                               '21': 0x54,
>                               '23': 0x5c,
>                               '25': 0x64,
>                               '27': 0x6c,
>                               '29': 0x74}
>
> So that, if I enter parameters:
>
> --test-parameter markings=10,13,15  
>
> Packets would carry ToS hex value:
>
> Differentiated Services Field: 0x28 (DSCP: 10, ECN: Not-ECT)
>  Differentiated Services Field: 0x34 (DSCP: 13, ECN: Not-ECT)
>  Differentiated Services Field: 0x38 (DSCP: 15, ECN: Not-ECT)
>
> Do you think this is possible? or what would be the right approach?

You could do that, of course, but since these will be specific to your
environment I can't include such a patch into Flent itself, so you'd
have to maintain that patch yourself.

An alternative is to use the hex values directly, and couple them with
the 'labels' test parameter to get the right plot labels. So you could
do this:

--test-parameter markings=0x28,0x34,0x38  --test-parameter labels=10,13,15

and that would achieve the same as updating the MARKING_MAP - you just
need to keep the order synced between the 'labels' and 'markings'
parameter.

Up to you which one you think is easiest to maintain, I guess :)


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] ` <tohojo/flent/issues/203/620745795@github.com>
@ 2020-04-28 17:28   ` Dave Taht
  0 siblings, 0 replies; 22+ messages in thread
From: Dave Taht @ 2020-04-28 17:28 UTC (permalink / raw)
  To: tohojo/flent; +Cc: tohojo/flent, Comment, flent-users


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Just because I'm dumb, why are you fiddling with non-standard dscp markings
in the first place?

I've been trying to get the folk testing this set for a while now,

https://tools.ietf.org/html/draft-ietf-tsvwg-rtcweb-qos-18

they are essentially supported in sch_cake's 4 tier model.


On Tue, Apr 28, 2020 at 10:25 AM olg33 <notifications@github.com> wrote:

> Thanks Toke,
> I cloned the repository in a brand new VM, Once there I modified the
> runners.py file removing the previous MARKING_MAP with my customized
> values. Then I ran a test using your second proposed method:
>
> ./run-flent rrul_var --test-parameter bidir_streams=3 --test-parameter
> markings=0x28,0x34,0x38 --test-parameter labels='10','13','15' -H
> 192.168.9.13 -l 60
>
> The packet capture shows the right hex values but seems like the labels
> are not going thru:
>
> Differentiated Services Field: 0x34 (DSCP: Unknown, ECN: Not-ECT)
> Differentiated Services Field: 0x38 (DSCP: AF13, ECN: Not-ECT)
> Differentiated Services Field: 0x28 (DSCP: Unknown, ECN: Not-ECT)
>
> On cases where the hex value matches a value in the previous Marking_Map,
> like 0x38, it fills the DSCP label AF13. I also ran a test with no quotes
> on the labels but got the same result. Needless to say first method didn't
> work neither.
>
> ./run-flent rrul_var --test-parameter bidir_streams=5 --test-parameter
> markings=10,13,15,17,19 -H 10.200.9.13 -l 60
>
> So, it seems like I'm missing something. I haven't properly installed
> flent (setup.py install) as I though modifying the marking_map and using
> the run-flent command would be enough.
>
> Is that the case?
>
> Thank you.
>
> —
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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] ` <tohojo/flent/issues/203/620754293@github.com>
@ 2020-04-28 17:50   ` Dave Taht
  0 siblings, 0 replies; 22+ messages in thread
From: Dave Taht @ 2020-04-28 17:50 UTC (permalink / raw)
  To: tohojo/flent; +Cc: tohojo/flent, Comment, flent-users


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good to know those markings, thx. So far as I recall riverbed ships cake.
Can you confirm?

It's easy to modify the prio table but feedback as to what is in use
elsewhere has always been lacking.



On Tue, Apr 28, 2020 at 10:41 AM olg33 <notifications@github.com> wrote:

> Right, using standard markings would make everyone's lives easier. But as
> mentioned, we have some providers whose equipment don't follow the rules.
>
>
> https://support.riverbed.com/bin/support/static/n0glmtc5kegfi7htfe7msdsgcb/html/uc6d3bbkbug83sroi75ersdj9i/sc_ug_html/index.html#page/sh_sd/app_tosdscp_qosclass.html
>
> Right now we are stuck with this scheme until we move to something more
> standard.
>
> Thanks for the info.
>
> —
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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (12 preceding siblings ...)
       [not found] ` <tohojo/flent/issues/203/620754293@github.com>
@ 2020-04-28 18:00 ` Toke Høiland-Jørgensen
  2020-04-28 19:10 ` Toke Høiland-Jørgensen
                   ` (6 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-28 18:00 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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On 28 April 2020 19:25:03 CEST, olg33 <notifications@github.com> wrote:
>Thanks Toke,
>I cloned the repository in a brand new VM, Once there I modified the
>runners.py file removing the previous MARKING_MAP with my customized
>values. Then I ran a test using your second proposed method:
>
>> ./run-flent rrul_var --test-parameter bidir_streams=3
>--test-parameter markings=0x28,0x34,0x38 --test-parameter
>labels='10','13','15' -H 192.168.9.13 -l 60
>
>The packet capture shows the right hex values but seems like the labels
>are not going thru:
> 
>Differentiated Services Field: 0x34 (DSCP: Unknown, ECN: Not-ECT)
>Differentiated Services Field: 0x38 (DSCP: AF13, ECN: Not-ECT)
>Differentiated Services Field: 0x28 (DSCP: Unknown, ECN: Not-ECT)

Where are you getting these values from? Tcpdump? The labels are not sent on the wire at all (and nothing you can do to change that).

The 'labels' parameter should set the plot labels on the Flent plots, though...


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (13 preceding siblings ...)
  2020-04-28 18:00 ` Toke Høiland-Jørgensen
@ 2020-04-28 19:10 ` Toke Høiland-Jørgensen
       [not found] ` <tohojo/flent/issues/203/620824256@github.com>
                   ` (5 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-28 19:10 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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olg33 <notifications@github.com> writes:

>> Where are you getting these values from? Tcpdump? The labels are not sent on the wire at all (and nothing you can do to change that).
>
>> The 'labels' parameter should set the plot labels on the Flent plots, though...
>
> It's Wireshark and I'm only showing the relevant information. Ok good to know, the labels are just for displaying purpose, in fact I'm not too worried about the labels as I'm feeding the output to Netdata for graphing. 
>
> My main concern is that (at least for me) the new MARKING_MAP doesn't seem to be working. 
> MARKING_MAP = {
>                               '10': 0x28,
>                                '11': 0x2c,
>                                '13': 0x34,
>                                '15': 0x38,
>                                '17': 0x40,
>                                '19': 0x4c,
>                                '20': 0x50,
>                                '21': 0x54,
>                                '23': 0x5c,
>                                '25': 0x64,
>                                '27': 0x6c,
>                                '29': 0x74}
> If I run the following test (after editing the MARKING_MAP with custom settings):
>
>> ./run-flent rrul_var --test-parameter bidir_streams=5 --test-parameter markings=10,13,15,17,19 -H 192.168.9.13 -l 60
>
> I only see packets marked with Hex values that are not part of the map:
>    
>> Differentiated Services Field: 0x08 (DSCP: Unknown, ECN: Not-ECT)
> Differentiated Services Field: 0x10 (DSCP: Unknown, ECN: Not-ECT)
> Differentiated Services Field: 0x0c (DSCP: Unknown, ECN: Not-ECT)

Ohh, right, the markings_map is only used for irtt and iperf, for
netperf the values are just passed directly through. Totally forgot
about that. I guess I could fix that, but TBH I'm not terribly keen on
supporting non-standard diffserv markings in this way.

You could do this yourself, though; if you replace this line in
NetperfDemoRunner (in runners.py):

args['marking'] = "-Y {0}".format(args['marking'])

with:

args['marking'] = self.parse_marking(args['marking'], "-Y {0}")

that should do the trick. You'll lose the support for different markings
on downstream and upstream, but that won't work with the 'markings' test
parameter anyway :)

> That's why I do believe I'm doing something wrong or maybe there was
> an additional step other than just editing the Marking_Map.
>
> In fact, using just the hex values works for me, but if someone else
> that only knows the custom dscp values want to test, that will fail,
> that's why I'd like to be able to feed those values.

Just checking, but when you say "someone else" you mean someone else who
has access to that same system, right?


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] ` <tohojo/flent/issues/203/620824256@github.com>
@ 2020-04-28 20:16   ` Dave Taht
  0 siblings, 0 replies; 22+ messages in thread
From: Dave Taht @ 2020-04-28 20:16 UTC (permalink / raw)
  To: tohojo/flent; +Cc: tohojo/flent, Comment, flent-users


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On Tue, Apr 28, 2020 at 1:03 PM olg33 <notifications@github.com> wrote:

> Ohh, right, the markings_map is only used for irtt and iperf, for
> netperf the values are just passed directly through. Totally forgot
> about that. I guess I could fix that, but TBH I'm not terribly keen on
> supporting non-standard diffserv markings in this way.
>
> You are totally right, I'm not expecting you to do my job, that's unfair
> and you have been very generous already. I'm just looking for clues (like
> the one provided) to fix my setup.
>
> Just checking, but when you say "someone else" you mean someone else who
> has access to that same system, right?
>
> Correct. Some Jr. members of my engineering team are only familiar with
> decimal values, no hex, so I want to help them out on that.
>

if you are in search of entertainment, have 'em watch:
https://blog.apnic.net/2020/01/22/bufferbloat-may-be-solved-but-its-not-over-yet/


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (15 preceding siblings ...)
       [not found] ` <tohojo/flent/issues/203/620824256@github.com>
@ 2020-04-28 20:51 ` Toke Høiland-Jørgensen
  2020-04-29 13:07 ` Toke Høiland-Jørgensen
                   ` (3 subsequent siblings)
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-28 20:51 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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olg33 <notifications@github.com> writes:

>> Ohh, right, the markings_map is only used for irtt and iperf, for
> netperf the values are just passed directly through. Totally forgot
> about that. I guess I could fix that, but TBH I'm not terribly keen on
> supporting non-standard diffserv markings in this way.
>
>
> You are totally right, I'm not expecting you to do my job, that's
> unfair and you have been very generous already. I'm just looking for
> clues (like the one provided) to fix my setup.
>
>> Just checking, but when you say "someone else" you mean someone else who
> has access to that same system, right?
>
> Correct. Some Jr. members of my engineering team are only familiar
> with decimal values, no hex, so I want to help them out on that.

Hmm, I can kinda see how that might be useful in other scenarios. I
obviously can't put your particular custom values in, but maybe having
the ability to provide symbolic names for diffserv mappings would be
useful in a generalised form.

Say, a separate option like '--define-marking-name foo=0x28' which
would dynamically update the MARKINGS_MAP and make --test-parameter
markings=foo work. Then you could add your custom mappings to .flentrc
so they would not have to be specified on the command line on every run.

Would that work for you?


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* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (16 preceding siblings ...)
  2020-04-28 20:51 ` Toke Høiland-Jørgensen
@ 2020-04-29 13:07 ` Toke Høiland-Jørgensen
  2020-04-29 17:14 ` Toke Høiland-Jørgensen
                   ` (2 subsequent siblings)
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  To: tohojo/flent; +Cc: Comment, flent-users


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Right, pushed as cf4f3da20b0ceadf7118fb15bc79b5e744623e2e - the commit message
explains the usage :)

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       [not found] <tohojo/flent/issues/203@github.com>
                   ` (17 preceding siblings ...)
  2020-04-29 13:07 ` Toke Høiland-Jørgensen
@ 2020-04-29 17:14 ` Toke Høiland-Jørgensen
  2020-04-30 16:01 ` Toke Høiland-Jørgensen
  2020-04-30 16:01 ` Toke Høiland-Jørgensen
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  To: tohojo/flent; +Cc: Comment, flent-users


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Flent has an --rcfile parameter. By default it's in ~/.flentrc


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       [not found] <tohojo/flent/issues/203@github.com>
                   ` (18 preceding siblings ...)
  2020-04-29 17:14 ` Toke Høiland-Jørgensen
@ 2020-04-30 16:01 ` Toke Høiland-Jørgensen
  2020-04-30 16:01 ` Toke Høiland-Jørgensen
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olg33 <notifications@github.com> writes:

> Perfect. I just ran a test with 12 streams (an extreme scenario for
> me) and all went well. Checking the packet capture I could confirm
> that every stream was marked with the hex value defined in the RC
> file. I'm glad that I was the first beneficiary of this new feature.
>
> Thanks for all the help!

Great! You're welcome! :)


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_______________________________________________
Flent-users mailing list
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^ permalink raw reply	[flat|nested] 22+ messages in thread

* Re: [Flent-users] [tohojo/flent] Customized test displaying error (#203)
       [not found] <tohojo/flent/issues/203@github.com>
                   ` (19 preceding siblings ...)
  2020-04-30 16:01 ` Toke Høiland-Jørgensen
@ 2020-04-30 16:01 ` Toke Høiland-Jørgensen
  20 siblings, 0 replies; 22+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-04-30 16:01 UTC (permalink / raw)
  To: tohojo/flent; +Cc: Comment, flent-users


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Closed #203.

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Reply to this email directly or view it on GitHub:
https://github.com/tohojo/flent/issues/203#event-3290211392

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^ permalink raw reply	[flat|nested] 22+ messages in thread

end of thread, other threads:[~2020-04-30 16:02 UTC | newest]

Thread overview: 22+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <tohojo/flent/issues/203@github.com>
2020-03-24 17:42 ` [Flent-users] [tohojo/flent] Customized test displaying error (#203) Toke Høiland-Jørgensen
2020-03-26 14:54 ` Toke Høiland-Jørgensen
2020-03-26 17:59 ` Toke Høiland-Jørgensen
2020-03-31 14:15 ` Toke Høiland-Jørgensen
2020-04-01 10:09 ` Toke Høiland-Jørgensen
2020-04-01 10:33   ` Sebastian Moeller
2020-04-01 11:10 ` Toke Høiland-Jørgensen
2020-04-03  8:30 ` Toke Høiland-Jørgensen
     [not found] ` <tohojo/flent/issues/203/608963421@github.com>
2020-04-04  3:25   ` Dave Taht
2020-04-06  9:22 ` Toke Høiland-Jørgensen
2020-04-08 21:31 ` Toke Høiland-Jørgensen
2020-04-28  9:38 ` Toke Høiland-Jørgensen
     [not found] ` <tohojo/flent/issues/203/620745795@github.com>
2020-04-28 17:28   ` Dave Taht
     [not found] ` <tohojo/flent/issues/203/620754293@github.com>
2020-04-28 17:50   ` Dave Taht
2020-04-28 18:00 ` Toke Høiland-Jørgensen
2020-04-28 19:10 ` Toke Høiland-Jørgensen
     [not found] ` <tohojo/flent/issues/203/620824256@github.com>
2020-04-28 20:16   ` Dave Taht
2020-04-28 20:51 ` Toke Høiland-Jørgensen
2020-04-29 13:07 ` Toke Høiland-Jørgensen
2020-04-29 17:14 ` Toke Høiland-Jørgensen
2020-04-30 16:01 ` Toke Høiland-Jørgensen
2020-04-30 16:01 ` Toke Høiland-Jørgensen

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