K 10
svn:author
V 8
gallatin
K 8
svn:date
V 27
1999-01-18T20:38:37.000000Z
K 7
svn:log
V 575
Reserve a major number for use by the Iprobe device driver.
Iprobe is an alpha-only system profiling suite which I'm porting from
Linux/alpha to FreeBSD.

Iprobe works by using the hardware profiling support built into
alpha cpus.  In a nutshell,  what Iprobe does is to setup the alpha
performance counters to sample the pc at a fairly high rate & dumps
those pc samples out to user space.  Then some code runs to map the
sampled PCs to functions.  You get a bit more than that (like the PSL
word, so you can tell if you're in the kernel or userland, what the
ipl is, etc).

END