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Top Forums Programming Find Virtual address space size for process Post 302254542 by odys on Tuesday 4th of November 2008 04:45:51 PM
Old 11-04-2008
Hello,

My suggestions:
1. sysconf() and _SC_PHYS_PAGES, not quite what you want and may be nonportable
2. /usr/bin/free or /proc/meminfo or equivalent to cut total memory from. I think you can write separate [portable] script that gets the information on platforms you need.
 

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mlock(2)							System Calls Manual							  mlock(2)

NAME
mlock() - lock a segment of the process virtual address space in memory SYNOPSIS
DESCRIPTION
The system call allows the calling process to lock a segment of the process virtual address space into memory. Any addressable segment of the process' address space may be locked. Locked segments are immune to all routine swapping. addr must be a valid address in the process virtual address space. addr + len must also be a valid address in the process virtual address space. Locks are applied at page boundaries that encompass the range from addr to addr + len. If any address within the range is not valid, an error is returned and no locks are applied. or can be used to unlock memory segments (or all memory segments) locked with Regardless of how many times a process locks a page, a single or will unlock it. An of a page within a range specified in an call results in only the range specified in the being unlocked. When memory is shared by multiple processes and mlocks are applied to the same physical page by multiple processes, a page remains locked until the last lock is removed from that page. Locks applied with are not inherited by a child process. The user must have the privilege. Although and the family of functions may be used together in an application, each may affect the other in unexpected ways. This practice is not recommended. Security Restrictions Some or all of the actions associated with this system call require the privilege. Processes owned by the superuser have this privilege. Processes owned by other users may have this privilege, depending on system configuration. See privileges(5) for more information about privileged access on systems that support fine-grained privileges. RETURN VALUE
returns the following values: Successful completion. Failure. The requested operation is not performed. is set to indicate the error. ERRORS
If fails, is set to one of the following values: One or more addresses in the specified range is not valid within the process address space. There is not enough lockable memory in the system to satisfy the locking request. The parameter was zero. The user does not have the privilege. EXAMPLES
The following call to locks the first 10 pages of the calling process in memory: SEE ALSO
setprivgrp(1M), getprivgrp(2), mlockall(2), munlock(2), munlockall(2), plock(2), privileges(5). STANDARDS CONFORMANCE
mlock(2)
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