>Number:         13922
>Category:       port-i386
>Synopsis:       VMware "hangs" in uvn_fp2 accompanied by excessive disk I/O
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 10 13:01:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Bill Squier
>Release:        -current (see System below)
>Organization:
	
>Environment:
	
System: NetBSD fin-rot.reefedge.com 1.5W NetBSD 1.5W (FIN-ROT) #0: Mon Jul 16 11:18:08 EDT 2001 groo@fin-rot.reefedge.com:/u2/trees/netbsd/current/src/sys/arch/i386/compile/FIN-ROT i386
Architecture: i386
Machine: i386
>Description:
	Under 1.5V and later (and possibly earlier) VMware is essentially
	unusable due to frequent "pauses" or "hangs" and periods of intense
	disk activity.  The pauses last approximately 3 seconds, and occur
	every 30-45 seconds.

	During this period of disk activity, one of the VMware threads is
	consistently in "uvn_fp2" (always different objects), approximately
	10MB-15MB of disk I/O occurs (unclear whether these are reads or
	writes), and frequently the "wired" memory count drops by the same
	10MB-15MB until it drops below a certain amount.

	It's not at all clear if the drop in wired memory is related, but
	it has been observed with some consistency.

	This problem does not manifest itself under 1.5.1, and has been
	independently confirmed by Thor Simon and Jason Thorpe.

>How-To-Repeat:
	Install -current.  Install vmware.  Run a virtual machine.
>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted: