Date: Tue, 01 Feb 2005 14:22:22 -0800 From: Sam Leffler <sam@errno.com> To: Paulo Fragoso <paulo@nlink.com.br> Cc: freebsd-hackers@freebsd.org Subject: Re: TX rate problem in hostap mode Message-ID: <4200011E.5080105@errno.com> In-Reply-To: <41FFF1B6.6070809@nlink.com.br> References: <41FFF1B6.6070809@nlink.com.br>
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Paulo Fragoso wrote: > Hi, > > We are using a Samsung wireless card (PRISM2) with FreeBSD 5.3 in hostap > mode and client is running FreeBSD 5.3 with Orinoco wireless card, all > works fine but tx rate at hostap it is all time in 2Mbps. > > We found this article for solve this problem with FreeBSD 5.x: > > http://excamera.com/cgi-bin/blosxom.cgi > > After modify dev/wi/if_wi.c in the hostap: > > --- dev/wi/if_wi.c.orig Tue Feb 1 17:15:20 2005 > +++ dev/wi/if_wi.c Tue Feb 1 17:58:44 2005 > @@ -958,6 +958,10 @@ > wi_dump_pkt(&frmhdr, NULL, -1); > fid = sc->sc_txd[cur].d_fid; > off = sizeof(frmhdr); > + > + /* tx_rate problem? */ > + frmhdr.wi_tx_rate = 110; > + > error = wi_write_bap(sc, fid, 0, &frmhdr, > sizeof(frmhdr)) != 0 > || wi_mwrite_bap(sc, fid, off, m0, > m0->m_pkthdr.len) != 0; > m_freem(m0); > > now we can get files from hostap faster (5x) than before. > > Both cards (hostap and client) was using mediaopt DS/11Mbps. > > Is possible ifconfig command change this field when using mediaopt > "DS/11Mbps"? Locking the xmit rate at 11Mb/s (or any rate for that matter) isn't a great idea though wi should honor a fixed rate. I thought Prism cards implemented rate control in the firmware for ap mode but perhaps not. netbsd has xmit rate control support for wi that purportedly does a good job; you might investigate it. If you come up with changes I'd be interested in integrating them into -current (which could then be brought back to -stable). Sam
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