From: Julien Grall <julien.grall@linaro.org>
To: edk2-devel-01 <edk2-devel@lists.01.org>,
star.zeng@intel.com, heyi.guo@linaro.org, ruiyu.ni@intel.com,
Laszlo Ersek <lersek@redhat.com>
Cc: Anthony PERARD <anthony.perard@citrix.com>,
Leif Lindholm <leif.lindholm@linaro.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Xen Console input very slow in recent UEFI
Date: Thu, 26 Oct 2017 12:05:50 +0100 [thread overview]
Message-ID: <7516a301-dfbb-5bd4-5e1e-ccd18c26db30@linaro.org> (raw)
Hi all,
I was doing more testing of UEFI in Xen guests and noticed some slow
down when using the shell. The characters are only echoed after a second
or two that is a bit annoying.
The change that introduced this issue is 4cf3f37c87 "MdeModulePkg
SerialDxe: Process timeout consistently in SerialRead".
The Serial Driver for Xen PV console is very simple (see
OvmfPkg/Library/XenConsoleSerialPortLib). So I am not sure where the
root cause is.
Would anyone have any tips on it?
Cheers,
--
Julien Grall
next reply other threads:[~2017-10-26 11:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-26 11:05 Julien Grall [this message]
2017-10-26 15:13 ` Xen Console input very slow in recent UEFI Laszlo Ersek
2017-10-26 15:20 ` Laszlo Ersek
2017-10-26 18:31 ` Julien Grall
2017-10-27 3:20 ` Zeng, Star
2017-10-27 12:38 ` Laszlo Ersek
2017-10-27 13:19 ` Julien Grall
2017-10-27 15:43 ` Laszlo Ersek
2017-10-30 1:09 ` Zeng, Star
2017-11-01 12:46 ` Julien Grall
2017-11-02 1:43 ` Zeng, Star
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