Date: Wed, 31 Jan 2001 14:33:04 +0900
From: Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp>
To: arch@FreeBSD.org
Cc: Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp>
Subject: Bumping up {MAX,DFL}*SIZ in i386
Message-ID: <vmhf2g5lrj.wl@rina.r.dl.itc.u-tokyo.ac.jp>
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Last night I ran a program processing very large amount of data. As the program ate up all of the available address space for data, I increased MAXDSIZ to 1.5GB so that the program ran successfully. Now that even an entry-model workstation can equip memory up to 1GB or more, MAXDSIZ and DFLDSIZ should be increased so that a process can make use of large memory. On the other hand, MAXDSIZ is also likely to hit VM_MAXUSER_ADDRESS, which is generally 3GB and may be 2GB if the size of KVM is expanded to the maximum. MAXDSIZ should thus not exceed 2GB. I propose the following values for the new user address space constraints: MAXTSIZ and DFLTSIZ: 256MB MAXDSIZ and DFLDSIZ: 1.5GB MAXSSIZ: 128MB Total: 1.875G (= 2G - 128M) MAXTSIZ and DFLTSIZ is bumped as we may want to run a large binary. A large binary calls for deep function calls, hence MAXSSIZ is bumped as well. These values are likely to be the final ones for i386 before jumping into ia64. Any comments or flames? -- Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp> <tanimura@FreeBSD.org> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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