<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=utf-8"> <META content="MSHTML 6.00.2900.3492" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=宋体>Dear All:</FONT></DIV> <DIV><FONT face=宋体 size=2></FONT> </DIV> <DIV>My USB modem is a 3G HSUPA data card modem.<BR><BR>The 3G network can support the upload speed up to be 5.76Mpbs, and I can reach this upload speed on Windows XP, so I think that the network environment will be well.</DIV> <DIV> </DIV> <DIV>And I have updated the out queue length and size for the option.ko driver. Before my updating, the upload speed is about 800Kpbs.After my updating, the upload speed is about 1.5Mpbs.No matter what I set the out queue length and size to be <BR> #define N_IN_URB 4<BR> -#define N_OUT_URB 1<BR> +#define N_OUT_URB 4<BR> #define IN_BUFLEN 4096<BR> -#define OUT_BUFLEN 128<BR> +#define OUT_BUFLEN 4096<BR>or<BR> #define N_IN_URB 4<BR> -#define N_OUT_URB 1<BR> +#define N_OUT_URB 8<BR> #define IN_BUFLEN 4096<BR> -#define OUT_BUFLEN 128<BR> +#define OUT_BUFLEN 4096<BR><BR>The upload speed will be 1.5Mpbs always.But the download speed can easily reach 7.2Mpbs.<BR><BR>So I think that the problem is not in the driver option.ko , isn't it? But I don't know whether it is limited but other kernel driver or the Ubuntu system configuration or not.</DIV> <DIV> <FONT face=宋体>Can you help me to find the problem where it is?</FONT></DIV> <DIV><FONT face=宋体></FONT> </DIV> <DIV><FONT face=宋体> Thanks very much.</FONT></DIV> <DIV><FONT face=宋体></FONT> </DIV> <DIV><FONT face=宋体>Best Regards,</FONT></DIV> <DIV><FONT face=宋体></FONT> </DIV> <DIV><FONT face=宋体>Franko Fang</FONT></DIV> <DIV><FONT face=宋体>2008-12-31</FONT></DIV> <DIV><FONT face=宋体 size=2></FONT> </DIV> <DIV><FONT face="Times New Roman" size=3></FONT> </DIV> <DIV><FONT face=宋体 size=2></FONT> </DIV> <DIV><BR></DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 9pt 宋体">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 9pt 宋体; font-color: black"><B>From:</B> <A title=martijn@vandestreek.net href="mailto:martijn@vandestreek.net">Martijn van de Streek</A> </DIV> <DIV style="FONT: 9pt 宋体"><B>To:</B> <A title=ubuntu-devel-discuss@lists.ubuntu.com href="mailto:ubuntu-devel-discuss@lists.ubuntu.com">Ubuntu Devel Discuss</A> </DIV> <DIV style="FONT: 9pt 宋体"><B>Sent:</B> Wednesday, December 31, 2008 5:09 PM</DIV> <DIV style="FONT: 9pt 宋体"><B>Subject:</B> Re: The upload speed problem about the USB modem on Ubuntu.</DIV> <DIV><BR></DIV>On Wed, Dec 31, 2008 at 9:55 AM, Manish Sinha <SPAN dir=ltr><<A href="mailto:manishsinha.tech@gmail.com">manishsinha.tech@gmail.com</A>></SPAN> wrote:<BR> <DIV class=gmail_quote> <BLOCKQUOTE class=gmail_quote style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid"> <DIV class=Ih2E3d>Franko Fang wrote:<BR>> I have a USB modem, it can reach the download speed up to 7.2Mbps and<BR>> the upload speed up to 5.76Mpbs.<BR></DIV>Is it ADSL? I hope so....</BLOCKQUOTE> <DIV> </DIV> <DIV>Could be HSPA (<A href="http://en.wikipedia.org/wiki/High-Speed_Packet_Access">http://en.wikipedia.org/wiki/High-Speed_Packet_Access</A>). The speeds match HSDPA/HSUPA.<BR><BR>In that case, your network operator might be limiting the speed (buying a more expensive plan should help in that case). Or maybe the network's a bit congested? Or it hasn't been upgraded to HSUPA yet?<BR><BR>Martijn <BR></DIV></DIV><BR> <P> <HR> <P></P>-- <BR>Ubuntu-devel-discuss mailing list<BR>Ubuntu-devel-discuss@lists.ubuntu.com<BR>Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss<BR></BLOCKQUOTE></BODY></HTML>