Dear Jorge,
A virtual machine simulates a physical machine based on the host OS. Almost
all the hardware resources is simulated by the virtual machine,
BIOS,CPU,RAM.... Of course, all these instruction will finally be carried out
by the really hardware.
Your action on the guest OS will first be decoded by the virtual machine(
actually it's just a programme!), then the host OS...finally to the hardware.
This is one reason why program in guest OS usually runs slower than that in
host OS.
In general, your hardware drivers will have complete support to your OS, like
Windows. But in your case, the graphics card driver cannot fully support the
linux. That's why you slower machine in the linux.
Best regards!
Lu zuokun
--
卢作焜
南开大学新生物站A202
At 2015-05-17 22:10:41, "Jorge Iulek"
<0000051fad3bd595-dmarc-requ...@jiscmail.ac.uk> wrote:
Thanks Carlos Contreras-Martel and Lu Zuokun for pointing me to check graphic
driver problems (or update them from the vendor, by the way, controller model
Intel HD 4000). Taking some time with this today, I still feel I will have to
study further before making changes.
This poses me yet other question, though maybe it escapes the discussion list
scope, that I must search further: how (and where) different are the resources
used by the virtual machine compared to the host machine, such that this
graphical behavior is different.
Yours,
Jorge
On 05/16/2015 08:39 PM, Jorge Iulek wrote:
Dear all,
My machine has openSuSE 12.3, a lenovo ideadpad with 8 cores (4 are
virutal) and 8 GB memory.
For a number of coot versions in it (including the newest one), coot
answers slowly to rotating, but specially the space bar translate is even more
slow (from residue x to x+1 etc.).
Curiously, in either CentOS or even openSuSE in oracle virtualboxes (under
this openSuSE host), to which I liberate only 1 cpu and only 1 GB memory, it
goes much faster, at a very reasonable speed. How could be that? In principle I
thought that the multicore configuration of the host machine might be the
culprit.
So, for coot tasks, I have been using the virtual machine, but that is
impractical.
The closest to this problem I found was
https://www.mail-archive.com/coot@jiscmail.ac.uk/msg03787.html , but I could
not devise any trial to solve the problem. Even trying the
http://www2.mrc-lmb.cam.ac.uk/personal/pemsley/coot/web/docs/coot.html#Slow-Computer-Configuration
configuration did not solve the problem satisfactorily. I tried to
search wider, but could not find other suggestions. Should you have one, I
would be glad to try. Sincerely yours,Jorge
