Actually I'm getting some lag occasionally to anywhere right now so it may
just be my Comcrap cable internet acting up. I'll check the video later
tonight when traffic is lighter.
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On Fri, 3 Apr 2015, Robert Dinse wrote:
Date: Fri, 3 Apr 2015 16:53:53 -0700 (PDT)
From: Robert Dinse <[email protected]>
To: Mihai Moldovan <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [X2Go-User] Centos 7
Thank you. Duh I don't know how I could stare at that directory and not
notice the missing extension. Ugh.
Thank you for your help. The 3.19.3 kernel I built is not only
preemptive but also stripped of most of the stuff I don't use. I also turn
off most of the kernel hacking and profiling stuff since it adds a tiny bit
of overhead.
It helped considerably over either the stock kernel or the one off of
el repo (the el repo 3.19.3-ml kernel), however the video isn't 100% fluid.
With the el repo kernel I got around maybe 10 frames per second, with
my custom kernel I get around 30 frames per second most of the time but there
are occasional glitches where the video will freeze for maybe a third of a
second.
Under Ubuntu, a kernel built the same way, the video is fluid. There
must be something in CentOS eating more resources.
Still the performance with preemptive enabled is significantly better
than without (server side).
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On Fri, 3 Apr 2015, Robert Dinse wrote:
Date: Fri, 3 Apr 2015 16:36:34 -0700 (PDT)
From: Robert Dinse <[email protected]>
To: Mihai Moldovan <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [X2Go-User] Centos 7
Something still isn't right, missing the step to create initramfs,
so I added:
mkinitrd initramfs-3.19.3-kg-1 3.19.3-kg-1
It creates it but when I run:
grub2-mkconfig -o /boot/grub2/grub.cfg
It doesn't see it:
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.19.3-kg-1
Found linux image: /boot/vmlinuz-3.19.3-1.el7.elrepo.x86_64
Found initrd image: /boot/initramfs-3.19.3-1.el7.elrepo.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-10a4840ccefb6d2f7accde9f4562308f
Found initrd image:
/boot/initramfs-0-rescue-10a4840ccefb6d2f7accde9f4562308f.im
It finds the vmlinuz but not the initramfs. Is there some conf file I
have to add that to? Sorry not much experience with grub2 by hand, just
the
old grub, and the make file does the right thing on the Debian based
machines.
The kernel I'm trying to add is vmlinuz-3.19.3-kg-1
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On Sat, 4 Apr 2015, Mihai Moldovan wrote:
Date: Sat, 04 Apr 2015 00:54:26 +0200
From: Mihai Moldovan <[email protected]>
To: Robert Dinse <[email protected]>,
"[email protected]" <[email protected]>
Subject: Re: [X2Go-User] Centos 7
On 03.04.2015 09:38 PM, Robert Dinse wrote:
Under CentOS 7
I've updated to the latest kernel provided in the El Repo
repository,
kernel-ml.x86_64 3.19.3-1.el7.elrepo @elrepo-kernel
They have no version configured with pre-emption and this version
without
does not provide smooth video over x2go, very jerky and laggy like the
stock
kernel.
If I build a kernel from source from kernel.org, even using the same
conf, and install it:
make clean; make; make modules_install install
I wouldn't use "make install".
cp arch/x86_64/boot/bzImage /boot/vmlinuz-3.19.3
cp System.map /boot/System.map-3.19.3
(or whatever the "real" version is, maybe even with the "localversion"
string appended. You'll figure it out.
The actual path may differ based on your architecture and the naming
conventions of in /boot/.)
/
/Afterwards,
grub2-mkconfig -o /boot/grub2/grub.cfg
And you're all set.
Try rebooting and it should work just fine.
Do not try to update grub.
Mihai
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