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 Information on actual vs theoretical throughput 
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Joined: Mon Aug 31, 2009 5:03 pm
Posts: 24
Post Re: Information on actual vs theoretical throughput
Mohawks wrote:
Eugene, can you test with the SingTel 2Wire MioBox (802.11g) with the POHD adaptor-n

copying to the POHD (802.11g) from my PC (wired), i only get around 200KB/s

copying to my laptop (802.11g) from my PC (wired), i get around 1.4MB/s (laptop next to POHD)


What kind of signal does the POHD show when you look at network settings? I was getting less then 2MB/s with an apple extreme base station (I get 10MB/s on my laptop and desktop), but noticed that the POHD only has half signal. I think the "antenna" on the wireless dongle is not very strong.


Thu Oct 01, 2009 8:20 pm
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Joined: Mon Aug 31, 2009 5:03 pm
Posts: 24
Post Re: Information on actual vs theoretical throughput
akoolen wrote:
The 'top' program showed that the CIFS daemon is very busy, showing that file data processing takes quite some time / processing power. My personal experience is that when the CPU gets idle for less than 30%, you'll probably get hiccups.


Yep. When transferring via wireless at under 2MB/s I'm getting 50-60% cpu usage from samba, and have 20-25% idle. I have practically no io-wait so the bottleneck is probably not the disk or network.

edit: the rest was not networking related


Last edited by kamina on Fri Oct 02, 2009 5:01 pm, edited 1 time in total.



Thu Oct 01, 2009 8:29 pm
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Joined: Mon Aug 24, 2009 11:19 am
Posts: 61
Location: Eindhoven, the Netherlands
Post Re: Information on actual vs theoretical throughput
Quote:
[I2C0] Xfer fail - TXABORT (1/2), Reason=0001
msg->addr = 3a
msg->flags = 0001
msg->len = 1
msg->buf = 800c1300

Apparently some I2C interface has problems. I don't know what HW components within the POHD use I2C, but HDMI uses I2C, for instance to get the EDID. AC Ryan guys will probably know what device is connected to I2C address 0x3A. My guess is that the system is so busy that (SW controlled?) I2C transmissions fail.


Fri Oct 02, 2009 7:31 am
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Joined: Mon Jan 21, 2008 3:07 am
Posts: 220
Location: Singapore
Post Re: Information on actual vs theoretical throughput
Mohawks wrote:
Eugene, can you test with the SingTel 2Wire MioBox (802.11g) with the POHD adaptor-n

copying to the POHD (802.11g) from my PC (wired), i only get around 200KB/s

copying to my laptop (802.11g) from my PC (wired), i get around 1.4MB/s (laptop next to POHD)


Bro, I do not have a 2Wire to test, using StarHub at home. :( Do you think you can pass me your 2Wire to test? By the way, what kind of security mode did you use on your 2Wire? WPA-PSK, WPA2-PSK?

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Fri Oct 02, 2009 9:06 am
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Joined: Sat Sep 19, 2009 2:53 pm
Posts: 20
Post Re: Information on actual vs theoretical throughput
Eugene wrote:
Mohawks wrote:
Eugene, can you test with the SingTel 2Wire MioBox (802.11g) with the POHD adaptor-n

copying to the POHD (802.11g) from my PC (wired), i only get around 200KB/s

copying to my laptop (802.11g) from my PC (wired), i get around 1.4MB/s (laptop next to POHD)


Bro, I do not have a 2Wire to test, using StarHub at home. :( Do you think you can pass me your 2Wire to test? By the way, what kind of security mode did you use on your 2Wire? WPA-PSK, WPA2-PSK?

signal strength is about 60%
Channel: 8 (2447 MHz)
Authentication: WPA2-PSK
Encryption: AES


Fri Oct 02, 2009 3:36 pm
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Joined: Mon Jan 21, 2008 3:07 am
Posts: 220
Location: Singapore
Post Re: Information on actual vs theoretical throughput
Mohawks wrote:
signal strength is about 60%
Channel: 8 (2447 MHz)
Authentication: WPA2-PSK
Encryption: AES


We had a walk in user this afternoon with a 2Wire, and when I run through I saw it is running at WPA-PSK and WPA2-PSK, encryption got no AES. I think should be TKIP for your case. Nevertheless regardless of any security modes, our Wireless N will still be able to connect (this is not your main issue anyway).

For this particular walk in user, his problem is he cannot even connect to his 2Wire, end up I notice his connection speed was set to 5.5Mbps instead of the defaults of 54Mbps. He also didn't know how it gets to 5.5Mbps, but maybe you can check this out on your side too?

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T: +65 6748 3218 (Ext 607) F: +65 6748 4568 W: www.acryan.com


Fri Oct 02, 2009 3:57 pm
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Joined: Mon Aug 31, 2009 5:03 pm
Posts: 24
Post Re: Information on actual vs theoretical throughput
akoolen wrote:
Quote:
[I2C0] Xfer fail - TXABORT (1/2), Reason=0001
msg->addr = 3a
msg->flags = 0001
msg->len = 1
msg->buf = 800c1300

Apparently some I2C interface has problems. I don't know what HW components within the POHD use I2C, but HDMI uses I2C, for instance to get the EDID. AC Ryan guys will probably know what device is connected to I2C address 0x3A. My guess is that the system is so busy that (SW controlled?) I2C transmissions fail.


You seem to be correct. I traced this down to having the tv shut down and the playon running. As soon as I shut down the tv I start getting those errors, they have nothing to do with networking. I'll remove my previous comments as offtopic...


Fri Oct 02, 2009 5:00 pm
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Joined: Sat Sep 19, 2009 2:53 pm
Posts: 20
Post Re: Information on actual vs theoretical throughput
Eugene wrote:
Mohawks wrote:
signal strength is about 60%
Channel: 8 (2447 MHz)
Authentication: WPA2-PSK
Encryption: AES


We had a walk in user this afternoon with a 2Wire, and when I run through I saw it is running at WPA-PSK and WPA2-PSK, encryption got no AES. I think should be TKIP for your case. Nevertheless regardless of any security modes, our Wireless N will still be able to connect (this is not your main issue anyway).

For this particular walk in user, his problem is he cannot even connect to his 2Wire, end up I notice his connection speed was set to 5.5Mbps instead of the defaults of 54Mbps. He also didn't know how it gets to 5.5Mbps, but maybe you can check this out on your side too?

for the MioBox (2Wire), if you use WPA-PSK, it's TKIP. And if u use WPA2-PSK, it's AES (i'm using this)

For the connection speed mine is 54Mbps. Like I mentioned, my MSI Wind can copy files from next to the POHD at 1.5MB/s (almost 10times faster than the POHD)


Sat Oct 03, 2009 10:01 am
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Joined: Sat Dec 05, 2009 12:06 am
Posts: 46
Post Re: Information on actual vs theoretical throughput
Hello,
I wanted to know whether i am limited to throughput because of the router i'm using?
I've set up everything exactly to how A.C. Ryan has recommended, have 100% connection, Aes, etc. My throughput max speed is only 2.1MB/s, am i limited because the router is slow and if so which one would you recommend that i should by.
By the way, i'm on the Mac, wireless n but rate is 130 but playon is @300 rate.
Regards, Nick

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Wed Jan 27, 2010 3:12 am
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Joined: Wed Dec 16, 2009 2:07 am
Posts: 80
Post Re: Information on actual vs theoretical throughput
Eugene wrote:

Fast Ethernet has a theoretical speed of 100 Mbits/sec (12 MB/sec)
Gigabit Ethernet has a theoretical speed of 1000 Mbits/sec (120 MB/sec)



Why do you show up Gigabit Ethernet when only Fast Ethernet is supported by POHD?

And these theoretical IPERF-results do not relly show up what is actual possible...

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Wed Jan 27, 2010 5:37 pm
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