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Old 01-22-2004, 05:41 AM   #1
aikempshall
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Registered: Nov 2003
Location: Bristol, Britain
Distribution: Slackware
Posts: 704

Rep: Reputation: 84
DSL Upload very slow


I have a 96MB Pentium 200MHZ 2 disk drive machine with and ethernet card connected to an DSL Alcatel 510v4 router/modem. One disk has W98 the other RH9
I'm fairly comfortable with the Download/Upload speeds (kbps) I get on W98 at 461/252. However on RH9 I get 456/29 - yes 29 for the Upload speed! Any suggestions where to start.

Using ethtool I get -

Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0xffffffff (-1)
Link detected: yes

From ifconfig I get -

eth0 Link encap:Ethernet HWaddr 00:10:A7:09:FB:07
inet addr:10.0.0.3 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3055 errors:0 dropped:0 overruns:0 frame:0
TX packets:1850 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1617844 (1.5 Mb) TX bytes:317184 (309.7 Kb)
Interrupt:10 Base address:0xc000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:16117 errors:0 dropped:0 overruns:0 frame:0
TX packets:16117 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1106319 (1.0 Mb) TX bytes:1106319 (1.0 Mb)

Thanks in anticipation
 
Old 01-24-2004, 03:39 AM   #2
aikempshall
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Registered: Nov 2003
Location: Bristol, Britain
Distribution: Slackware
Posts: 704

Original Poster
Rep: Reputation: 84
I'm beginning to wonder whether the problem is the low spec of my machine. I do have problems with printing also in that generating a spool file takes an inordinately long time writing to swap as it does Although from the W98 end although slow is not as painfully slow as RedHat (same machine, same modem - different Harddrive)

Back to DSL.

Ran the tweak test on DSLReports and got the following, can someone explain the bit about the "Upload packet less than your MTU (FAQ #1492)" in the report.

Your Tweakable Settings:
Receive Window (RWIN): 63712
Window Scaling: 0
Path MTU Discovery: ON
RFC1323 Window Scaling: ON
RFC1323 Time Stamping: ON
Selective Acks: ON
MSS requested: 1460
TTL: unknown
TTL remaining: 46

Notes and recommendations:
Choose RWIN between 5840 and 13140 (FAQ #586)
See tweaks/Unix page
Read the tweak FAQ
Example 146000 byte download
Actual data bytes sent: 147448
Actual data packets: 102
Max packet sent (MTU): 1488
Max packet recd (MTU): 1488
Retransmitted data packets: 1
sacks you sent: 10
pushed data pkts: 8
data transmit time: 2.469 secs
our max idletime: 148.2 ms
transfer rate: 46982 bytes/sec
transfer rate: 375 kbits/sec
This is not a speed test!
transfer efficiency: 99%

Notes and recommendations:
Upload packet less than your MTU (FAQ #1492)
Good data stream (no/few rexmits)

I've run some Pings froms the problem machine and from an XP machine using the same DSL modem. I'm happy with the reponse from the XP machine as I am with the W98 portion of the machine that also runs Redhat.

Ping Test from Redhat

ping -c10 -s1472 www.dslreports.com
PING dslreports.com (209.123.109.175) 1472(1500) bytes of data.
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=1 ttl=54 time=175 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=2 ttl=54 time=174 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=3 ttl=54 time=178 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=4 ttl=54 time=174 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=5 ttl=54 time=175 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=6 ttl=54 time=174 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=7 ttl=54 time=176 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=8 ttl=54 time=179 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=9 ttl=54 time=178 ms
1480 bytes from www.dslreports.com (209.123.109.175): icmp_seq=10 ttl=54 time=175 ms

--- dslreports.com ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9236ms
rtt min/avg/max/mdev = 174.145/176.322/179.226/1.767 ms

Ping test from XP different machine same modem/router

Pinging dslreports.com [209.123.109.175] with 1480 bytes of data:

Reply from 209.123.109.175: bytes=1480 time=177ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=178ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=177ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=180ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=177ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=181ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=180ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=177ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=177ms TTL=54
Reply from 209.123.109.175: bytes=1480 time=178ms TTL=54

Ping statistics for 209.123.109.175:
Packets: Sent = 10, Received = 10, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 177ms, Maximum = 181ms, Average = 178ms
 
Old 01-27-2004, 11:00 AM   #3
aikempshall
Member
 
Registered: Nov 2003
Location: Bristol, Britain
Distribution: Slackware
Posts: 704

Original Poster
Rep: Reputation: 84
After lots of pinging with

ping - c3 -s5000 www.dslreports.com

on both a DSL and a PPP (56kbps) connection i've come to the conclusion that the ADSLGUIDE and dslreports sites are reporting my Upstream speed incorrectly. The pings would suggest, however inaccurately, that the speed of the DSL is only about 4.5 times faster than PPP (56Kbps) which I don't thing is very good. I've also mailed a 5M attachment via Ximian which took about 4 minutes which works out about 170Kbps or 20KBps for uploading. Is this good/bad or indifferent?

for DSL

PING dslreports.com (209.123.109.175) 5000(5028) bytes of data.
5008 bytes from www.dslreports.com (209.123.109.175): icmp_seq=1 ttl=54 time=351 ms
5008 bytes from www.dslreports.com (209.123.109.175): icmp_seq=2 ttl=54 time=347 ms
5008 bytes from www.dslreports.com (209.123.109.175): icmp_seq=3 ttl=54 time=347 ms

--- dslreports.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2017ms
rtt min/avg/max/mdev = 347.814/349.121/351.649/1.851 ms

for PPP (56Kbps)

PING dslreports.com (209.123.109.175) 5000(5028) bytes of data.
5008 bytes from www.dslreports.com (209.123.109.175): icmp_seq=1 ttl=55 time=2048 ms
5008 bytes from www.dslreports.com (209.123.109.175): icmp_seq=2 ttl=55 time=2039 ms
5008 bytes from www.dslreports.com (209.123.109.175): icmp_seq=3 ttl=55 time=2059 ms

--- dslreports.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2018ms
rtt min/avg/max/mdev = 2039.965/2049.359/2059.924/8.355 ms


Thanks in anticipation
 
  


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