Variation in bandwidth limiting when using latency

Started by Christophe

Christophe

Variation in bandwidth limiting when using latency   25 June 2015, 00:54

Hi,

I see strange variation in the bandwidth limit when using latency setting. I am "streaming" to the PC where Connection Emulator is installed the maximum bandwidth available using PCoIP.

First I use only bandwidth limiting to 2MBps. The limit works well, and I read the "IN:" parameter to 2Mbps. The graph looks flat.
When I activate Latency to 65ms, I see "symmetric" spikes ranging from 1.7 to 2.3 totaling 2.0Mbps as mean, but exceeding the max setting of 2.0Mbps.

I have the snapshot of both but cannot post them to the forum.

Is it normal?
Christophe.

PS: I put the buffer setting to 10 Millions.
SoftPerfect Support forum - Andrew avatar image

Re: Variation in bandwidth limiting when using latency   25 June 2015, 23:53

Hi Christophe,

Are you using version 1.6? I have observed similar behaviour with older versions, but if you are seeing this with the latest version, I will check it again.
Christophe

Re: Variation in bandwidth limiting when using latency   26 June 2015, 18:46

Hi,

I am using Version 1.6.0 64bits, on a Windows 7 64bit PC. This PC has only one network plug.

Christophe.
SoftPerfect Support forum - Andrew avatar image

Re: Variation in bandwidth limiting when using latency   08 July 2015, 16:21

Again, sorry for a delay with my response. We've been trying to reproduce this behavior and this didn't seem to happen, at least for a regular FTP download. This may be something specific to PCoIP.

A test with a 2M bandwidth cap without added latency

SoftPerfect support forum

A test with a 2M bandwidth with added 65ms latency

SoftPerfect support forum


However, I have also done a couple of changes in the CE core related to the bandwidth cap and latency simulation. Please try the latest build and let me know if you are still experiencing issues.

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