[coreboot] Patch merged into master: 5f1cfd8 Do full flush on uart8250 only at end of printk.
gerrit at coreboot.org
gerrit at coreboot.org
Tue Jul 12 11:36:22 CEST 2011
the following patch was just integrated into master:
commit 5f1cfd8ee9d400f20a5aa30eb50b9afb5e2694db
Author: Kevin O'Connor <kevin at koconnor.net>
Date: Sat Jul 9 20:22:21 2011 -0400
Do full flush on uart8250 only at end of printk.
The previous code does a full flush of the uart after every character.
Unfortunately, this can cause transmission delays on some serial
ports.
This patch changes the code so that it does a flush at the end of
every printk instead of at the end of every character. This reduces
the time it takes to transmit serial messages (up to 9% on my Asrock
e350m1 board). It also makes the transmission time more consistent
which is important when performing timing tests via serial
transmissions.
Change-Id: I6b28488b905da68c6d68d7c517cc743cde567d70
Signed-off-by: Kevin O'Connor <kevin at koconnor.net>
See http://review.coreboot.org/90 for details.
-gerrit
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