Date: Tue, 4 Jan 2011 14:03:52 -0600 From: Lin Xue <lxue2@tigers.lsu.edu> To: freebsd-ipfw@freebsd.org Subject: RED SCALE problem? Message-ID: <AANLkTi=m6WwR48xLndCnfRoHh5tEUq7X9%2BsTQXgepDr7@mail.gmail.com>
next in thread | raw e-mail | index | archive | help
Hi all, I am trying to do some test on RED for different parameters(like min/max threshold, probability..), but find there might be some problem with SCALE of RED. In ip_dummynet.h RED SCALE is defined as: #define SCALE_RED 16 #define SCALE(x) ( (x) << SCALE_RED ) And in ip_dummynet.c, the min and max threshold is scaled below: /* Now doing stuff that was in kerneland */ fs->min_th = SCALE(fs->fs.min_th); fs->max_th = SCALE(fs->fs.max_th); In that case, the min and max threshold will only support up to 16 bit (0-65K+) ? otherwise the higher bits will be dropped, because min_th and min_th all are int. Thank you!
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?AANLkTi=m6WwR48xLndCnfRoHh5tEUq7X9%2BsTQXgepDr7>