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From: "David F." <df7729@gmail.com>
Date: Mon, 23 Oct 2017 16:59:10 -0700
Message-ID: <CAGRSmLu37=omHuz3GK_NY0e90U1k3TMoGjYjQz78pm9L3+TW+w@mail.gmail.com>
To: edk2 developers list <edk2-devel@lists.01.org>
Subject: timer ticks ?
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Hi,

Is there a reliable (always available) way to get a timer tick in an
application similar to the old 18.2 per second timer tick from BIOS.
That one was always there, high speed access (no slow access to a RTC)
 and the tick count is known (to approx calculate intervals for
polling and other things).  In UEFI,  EVT_TIMER may not be supported.
GetTime may be slow RTC access.    It can be a counter only since
machine was on.

TIA!