From: "Brian J. Johnson" <bjohnson@sgi.com>
To: Star Zeng <star.zeng@intel.com>, <edk2-devel@lists.01.org>
Cc: Michael D Kinney <michael.d.kinney@intel.com>,
Liming Gao <liming.gao@intel.com>
Subject: Re: [PATCH] PcAtChipsetPkg AcpiTimerLib: Get more accurate TSC Frequency
Date: Thu, 11 Aug 2016 08:41:13 -0500 [thread overview]
Message-ID: <cd215b9c-912a-78dd-8c4c-0d52e1e4686c@sgi.com> (raw)
In-Reply-To: <1470883079-4472-1-git-send-email-star.zeng@intel.com>
On 08/10/2016 09:37 PM, Star Zeng wrote:
> Minimize the code overhead between the two TSC reads by adding
> new internal API to calculate TSC Frequency instead of reusing
> MicroSecondDelay ().
Why not just use the MSR_PLATFORM_INFO (0xce) register bits 15..8, on
CPUs where it's available, to read the TSC frequency directly?
--
Brian J. Johnson
--------------------------------------------------------------------
My statements are my own, are not authorized by SGI, and do not
necessarily represent SGI’s positions.
next prev parent reply other threads:[~2016-08-11 13:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-11 2:37 [PATCH] PcAtChipsetPkg AcpiTimerLib: Get more accurate TSC Frequency Star Zeng
2016-08-11 2:42 ` Gao, Liming
2016-08-11 5:01 ` Kinney, Michael D
2016-08-11 13:41 ` Brian J. Johnson [this message]
2016-08-12 1:07 ` Zeng, Star
2016-08-12 8:31 ` Paolo Bonzini
2016-08-12 8:43 ` Zeng, Star
2016-08-12 18:27 ` Kinney, Michael D
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