From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <79a3035b869d65fb99f2e9fecf1ba9fd@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] venti arenas
From: rsc@plan9.bell-labs.com
In-Reply-To: <7ae69a86431964c1aa5e77e8d3574406@9fs.org>
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Date: Wed, 30 Apr 2003 14:10:26 -0400
Topicbox-Message-UUID: 9c747e2e-eacb-11e9-9e20-41e7f4b1d025

Jmk and I think the solution is this:

	apsize = ap->size - ap->arenaBase;
	n = apsize / asize;

	fprint(2, "configuring %s with arenas=%d for a total storage of bytes=%lld and directory bytes=%d\n",
		file, n, apsize, ap->tabSize);

	ap->narenas = n;
	ap->map = MKNZ(AMap, n);
	ap->arenas = MKNZ(Arena*, n);

	addr = ap->arenaBase;
	for(i = 0; i < n; i++){
		limit = addr + asize;
		snprint(aname, ANameSize, "%s%d", name, i);
		fprint(2, "adding arena %s at [%lld,%lld)\n", aname, addr, limit);

Even on a small system there are 200+ arenas.
Another half-sized one isn't going to help much.

Russ