Date: Sat, 6 Mar 2010 16:35:36 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-hackers@freebsd.org Cc: Kevin Day <toasty@dragondata.com> Subject: Re: ACPI/power implementation causing performance loss with i7/Nehalem turbo boost Message-ID: <201003061635.44684.doconnor@gsoft.com.au> In-Reply-To: <0ECDEB94-E60E-45C7-98AC-5E948DE4649C@dragondata.com> References: <0ECDEB94-E60E-45C7-98AC-5E948DE4649C@dragondata.com>
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--nextPart19212338.WHq44byRUD Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Sat, 6 Mar 2010, Kevin Day wrote: > So, it seems that the VMware hypervisor is deactivating cores on the > CPU when idle, but FreeBSD itself isn't. Is anyone working on giving > FreeBSD's idle loop/scheduler the ability to go into deeper sleep > states? It seems this would have more than just a power savings > benefit now. What does "sysctl dev.cpu.0.cx_lowest" say? And "sysctl dev.cpu.$N.cx_supported" ? ISTR FreeBSD defaults to a very conservative setting here so you may=20 have to set it manually. =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart19212338.WHq44byRUD Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iD8DBQBLkfC45ZPcIHs/zowRAht4AJ95NQzWrtVeTAWpT8mFEBGiNAso5gCgqo30 SkOQZS5P4gPjKhansG61weM= =zGyk -----END PGP SIGNATURE----- --nextPart19212338.WHq44byRUD--
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