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Re: Why is virtual memory so high? (crash)

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Re: Why is virtual memory so high? (crash)

Subject: Re: Why is virtual memory so high? (crash)
From: Mario Emmenlauer <email@hidden>
Date: Tue, 20 Jan 2009 17:43:56 +0100


Hi Shawn,

Shawn Erickson wrote:

On Mon, Jan 19, 2009 at 1:18 AM, Mario Emmenlauer <email@hidden> wrote:
I have a large C/C++ project with thousands of lines of code and
many thirdparty-libraries. When it startes up, it reserves around 1.8GB
of virtual memory (40MB real memory), and I don't know why.
Are there better/other tools I could try to inspect where the additional vmem is reserved?
vmmap (http://developer.apple.com/documentation/Darwin/Reference/ManPages/man1/vmmap.1.html)

Thanks! I used vmmap, it claims ~600MB should be used by my
process. Activity Monitor instead shows 1220MB virtual memory
usage, twice as much. Who is right? Am I doing something wrong?

By the way, what is IOKit with 281MB and STACK GUARD with 56MB?
Both seem unreasonably high...

==== Summary for process 30612
ReadOnly portion of Libraries: Total=137.1M resident=80.7M(59%)
                               swapped_out_or_unallocated=56.4M(41%)
Writable regions: Total=447.9M written=14.3M(3%) resident=51.2M(11%)
                  swapped_out=0K(0%) unallocated=396.7M(89%)

REGION TYPE             [ VIRTUAL/RESIDENT]
===========             [ =======/========]
ATS (font support)      [   32.7M/    500K]
CG backing stores       [   38.6M/   25.1M]
CG raster data          [     28K/     28K]
CG shared images        [   1056K/   1032K]
Carbon                  [   1732K/   1732K]
CoreGraphics            [    168K/    104K]
IOKit                   [  281.1M/   4484K]
MALLOC                  [   51.5M/   19.1M]
STACK GUARD             [   56.0M/      0K]
Stack                   [   9740K/    112K]
VM_ALLOCATE ?           [   16.2M/    120K]
__DATA                  [   10.5M/   9468K]
__IMAGE                 [   1240K/    132K]
__IMPORT                [    552K/    504K]
__LINKEDIT              [   11.0M/   10.3M]
__OBJC                  [   1136K/   1080K]
__OBJC/__DATA           [    268K/    240K]
__PAGEZERO              [      4K/      0K]
__TEXT                  [  126.1M/   70.5M]
__UNICODE               [    532K/    344K]
mapped file             [  160.0M/   12.8M]
shared memory           [   16.0M/     52K]
shared pmap             [   5316K/   2684K]


Best,

    Mario

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Follow-Ups:

Re: Why is virtual memory so high? (crash)
From: "Justin C. Walker" <email@hidden>


References:  
  >Why is virtual memory so high? (crash) (From: Mario Emmenlauer <email@hidden>)
  >Re: Why is virtual memory so high? (crash) (From: Shawn Erickson <email@hidden>)




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