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[h-e-w] private bytes as vsize in w32.c system_process_attributes()

From: Mike Small
Subject: [h-e-w] private bytes as vsize in w32.c system_process_attributes()
Date: Thu, 25 Oct 2012 16:39:05 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2 (berkeley-unix)


I tried proced in emacs 23.3 under Windows XP and saw something I
thought was unusual in its process information. Certain applications
display with a significantly smaller VSize than RSS. I believe this is
because system_process_attributes() in w32.c uses the PrivateUsage field
from the PROCESS_MEMORY_COUNTERS_EX structure returned by
get_process_memory_info(). PrivateUsage excludes memory shareable with
other processes, say because it's from loaded dll segments. The following page
suggests using 
MEMORYSTATUSEX.ullTotalVirtual - MEMORYSTATUSEX.ullAvailVirtual 
from GlobalMemoryStatusEx() for virtual size (see the Virtual Bytes row):

Is the current choice intentional?

Mike Small

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