Date: Wed, 5 Sep 2007 19:50:49 +1000 From: Peter Jeremy <peterjeremy@optushome.com.au> To: freebsd-amd64@freebsd.org Subject: amd64 process sizes Message-ID: <20070905095049.GH1167@turion.vk2pj.dyndns.org>
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--r5Pyd7+fXNt84Ff3 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I've been comparing VSZ reported for similar processes on amd64 and i386 and found that amd64 processes report as vastly larger than I expected: i386 amd64 1476 3572 getty 6272 29184 xclock 4784 28020 xdm 6420 30000 xterm 3828 9444 sendmail I did some further digging into the procfs map for xterm and found that each of the amd64 shared objects has an additional mapping that is 255 or 256 pages. Once you remove those mappings, the sizes are reasonably similar. A typical set of mappings is: 0x800f60000 0x800fba000 61 0 0xffffff0027ac2540 r-x 36 18 0x0 COW NC vnode = /usr/local/lib/libXaw8.so.8 0x800fba000 0x800fbb000 1 0 0xffffff002765ed20 r-x 1 0 0x2180 COW NC vnode = /usr/local/lib/libXaw8.so.8 0x800fbb000 0x8010bb000 18 0 0xffffff0027ac2540 r-x 36 18 0x0 COW NC vnode = /usr/local/lib/libXaw8.so.8 [*] 0x8010bb000 0x8010cd000 18 0 0xffffff00274d2c40 rw- 1 0 0x2180 COW NC vnode= /usr/local/lib/libXaw8.so.8 0x28284000 0x282d7000 15 0 0xc360ad68 r-x 9 6 0x0 COW NC vnode /usr/local/l= ib/libXaw8.so.8 0x282d7000 0x282d8000 0 0 0xc3a4b210 r-x 1 0 0x2180 COW NC vnode /usr/local= /lib/libXaw8.so.8 0x282d8000 0x282df000 3 0 0xc3aef39c rwx 1 0 0x2180 COW NC vnode /usr/local= /lib/libXaw8.so.8 Could someone please explain the purpose of the mapping [*] and what system resources they occupy. --=20 Peter Jeremy --r5Pyd7+fXNt84Ff3 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFG3nv5/opHv/APuIcRAk7YAJ9vO6xou63u758HaOiOaaP1In7MJgCfRcPZ XEqiHMcWzcrifx24GY46lek= =spBq -----END PGP SIGNATURE----- --r5Pyd7+fXNt84Ff3--
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