Date: Mon, 18 Jan 1999 12:38:38 -0800 (PST) From: Andrew Gallatin <gallatin@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: cvs commit: src/sys/alpha/conf majors.alpha Message-ID: <199901182038.MAA25852@freefall.freebsd.org>
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gallatin 1999/01/18 12:38:37 PST
Modified files:
sys/alpha/conf majors.alpha
Log:
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).
Revision Changes Path
1.7 +2 -1 src/sys/alpha/conf/majors.alpha
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