Title: [uml-user] Increasing perfomance
Robin,
 
You can verify the use of tmpfs with the 'lsof' command. For example, assuming that tmpfs is mounted at /dev/shm, you might see:
 
# lsof |egrep 'PID|/shm'
COMMAND     PID     USER   FD      TYPE     DEVICE      SIZE       NODE NAME
linux-2.6  3817  umowned  DEL       REG       0,12                 5461 /dev/shm/vm_file-0yTQhm
linux-2.6  3817  umowned    3u      REG       0,12  67108865       5461 /dev/shm/vm_file-0yTQhm (deleted)
linux-2.6  3821  umowned  DEL       REG       0,12                 5461 /dev/shm/vm_file-0yTQhm
linux-2.6  3821  umowned    3u      REG       0,12  67108865       5461 /dev/shm/vm_file-0yTQhm (deleted)
linux-2.6  3825  umowned  DEL       REG       0,12                 5461 /dev/shm/vm_file-0yTQhm
linux-2.6  3825  umowned    3u      REG       0,12  67108865       5461 /dev/shm/vm_file-0yTQhm (deleted)
linux-2.6  3826  umowned  DEL       REG       0,12                 5461 /dev/shm/vm_file-0yTQhm
linux-2.6  3826  umowned    3u      REG       0,12  67108865       5461 /dev/shm/vm_file-0yTQhm (deleted)
#
 
Note that the file has been deleted. Because of this, you can't see it in a directory listing.
 
Tony


From: [EMAIL PROTECTED] on behalf of Robin Lee Powell
Sent: Fri 9/30/2005 10:47 PM
To: user-mode-linux-user@lists.sourceforge.net
Subject: [uml-user] Increasing perfomance

Looked at the mailing list, found the following tips:

1.  Set TMP/TEMP/TMPDIR to a tmpfs mounted place.

    Did that.  I see no sign that UML is using it.

2.  Don't use synchronous UBD on anything older than 2.6.9

    2.6.13.2


That's all I can remember.  Are there others?

Still a fair bit slower than I'd like.

Unfortunately, my primary use (mooix) involves a lot of process
creation.  I gather that's expensive in UML.

-Robin

--
http://www.digitalkingdom.org/~rlpowell/ *** http://www.lojban.org/
Reason #237 To Learn Lojban: "Homonyms: Their Grate!"
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