Date: Sun, 4 Sep 2016 17:50:23 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r305391 - head/sys/arm64/arm64 Message-ID: <201609041750.u84HoNtn056564@repo.freebsd.org>
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Author: andrew Date: Sun Sep 4 17:50:23 2016 New Revision: 305391 URL: https://svnweb.freebsd.org/changeset/base/305391 Log: Enable superpages on arm64 by default. These seem to be stable, having survived multiple world and kernel builds, and of poudriere building full package sets. I have observed a 3% reduction in buildworld times with superpages enabled, however further testing is needed to see if this is observed in other workloads. Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Modified: head/sys/arm64/arm64/pmap.c Modified: head/sys/arm64/arm64/pmap.c ============================================================================== --- head/sys/arm64/arm64/pmap.c Sun Sep 4 17:26:42 2016 (r305390) +++ head/sys/arm64/arm64/pmap.c Sun Sep 4 17:50:23 2016 (r305391) @@ -242,7 +242,7 @@ extern pt_entry_t pagetable_dmap[]; static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters"); -static int superpages_enabled = 0; +static int superpages_enabled = 1; SYSCTL_INT(_vm_pmap, OID_AUTO, superpages_enabled, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &superpages_enabled, 0, "Are large page mappings enabled?");
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