Date: Fri, 27 Sep 2002 16:01:37 -0700 From: "Coleman, Ellery" <ellery.coleman@medtronic.com> To: <freebsd-questions@freebsd.org> Cc: <freebsd-arch@freebsd.org> Subject: Memory Allocation Accounting (a conceptual question) Message-ID: <913C3C216F747D4289B2E9151578E9B4390AD9@LAXM1BMSGM50.ent.core.medtronic.com>
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Hey guys,
Can you reference any articles/FAQ's that deal with the following =
questions:
1- Does the modern unix kernel (ie. FreeBSD, solaris, linux) implement =
Memory Allocation Accounting (MMA)? In my mind, an MMA system would =
keep track of how much memory each process has "checked out" and =
returned since it began running. So if a proccess checks out 512MB =
throughout it's lifetime, and only returns 256MB before it dies, the =
kernel would have a record of this. And there would be some command =
line tool which enabled users to access this accounting information. =20
2- If modern kernels do not implement MMA, can this info be retrieved by =
sifting through the /proc filesystem? (perhaps i could put together a =
system memory allocation map using perl to sift through the /proc data?)
3- If i were able to determine that a process had died without returning =
all of it's memory, does the modern unix kernel provide a mechanism that =
would allow me to retrieve/recycle this wasted memory?
If these are stupid questions, or if there are some elementary kernel =
design principles that preclude the MMA functionality as i have =
described it, please enlighten me. Many Thanks in advance for any =
comments/suggestions.
best regards,
o-> el
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