Ketil Malde wrote:
What do you mean by "memory size"? How much RAM is installed in the system? The amount which the process is currently using? The amount which the OS might be willing to allocate to your process at any given point in time? Something else?
My aplogies for being unclear! What I really want is the amount of memory my application can allocate and excercise lively without causing thrashing. On my Linux computer, that amounts more or less to the installed, physical RAM, minus a bit, so I'll settle for that. :-)
(After browsing various information, it seems I'm after the minimum of physical RAM and getrlimit(RLIMIT_DATA)).
IIRC, getrlimit(RLIMIT_DATA) doesn't mean much on Linux, as it doesn't
include memory which is added using mmap(..., MAP_ANON), which is used
by glibc's malloc(). Also, getrlimit(RLIMIT_RSS) is probably more
relevant for your purposes.
--
Glynn Clements