I want to expand my tool so it can investigate which of its pages are
swapped out under cache pressure or real memory pressure.
However, to do this, I need a way to determine if a page is there or if it
is swapped out. My two questions are:
1) is there an existing way to do this
(the kernel obviously knows)
2) would it be correct to expand mincore to also work on
non-filebacked memory so it works for 'swap-backed' memory too?
Thanks.
Some current output of the scenario tool:
vmloader> alloc 25
Arena now 25 megabytes, 6250 pages
vmloader> sweep
Sweeping from mbyte 0 to 25, 6250 pages. Done
vmloader> rusage
minor: 6250, major: 2, swaps: 0
vmloader> sweep 0 12
Sweeping from mbyte 0 to 12, 1440 pages. Done
vmloader> rusage
minor: 0, major: 0, swaps: 0
vmloader> touch
Touching from mbyte 0 to 25, 6250 pages. Done
vmloader> rusage
minor: 6249, major: 0, swaps: 0
vmloader> rsweep
Random sweeping from mbyte 0 to 25, 6250 pages. Done
vmloader> rusage
minor: 0, major: 0, swaps: 0
-- http://www.PowerDNS.com Versatile DNS Software & Services http://lartc.org Linux Advanced Routing & Traffic Control HOWTO - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/