Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 4 Nov 2010 04:41:12 -0400 (EDT) | From | CAI Qian <> | Subject | Re: [PATCH 00 of 66] Transparent Hugepage Support #32 |
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Thank Andrea for pointing out to me there are ongoing works for KSM and THP integration. Sorry for the noise.
CAI Qian
----- caiqian@redhat.com wrote:
> There were some changes of behaviours with THP and KSM statistics > demonstrated by this program, http://people.redhat.com/qcai/ksm01.c. > > There are 3 programs (A, B ,C) to allocate 128M memory each using KSM. > A has memory content = 'c'. > B has memory content = 'a'. > C has memory content = 'a'. > Then without THP, > pages_shared = 2 > pages_sharing = 98285 > pages_sharing = 98292 > pages_unshared = 0 > pages_volatile = 17 > pages_to_scan = 98304 > sleep_millisecs = 0 > with THP, > pages_shared is 2. > pages_sharing is 18422. > pages_unshared is 0. > pages_volatile is 8. > > Later, > A has memory content = 'c' > B has memory content = 'b' > C has memory content = 'a'. > Then without THP, > pages_shared = 3 > pages_sharing = 98296 > pages_unshared = 0 > pages_volatile = 5 > with THP, > pages_shared = 3 > pages_sharing = 16358 > pages_unshared = 0 > pages_volatile = 23 > > Later, > A has memory content = 'd' > B has memory content = 'd' > C has memory content = 'd' > Then without THP, > pages_shared = 1 > pages_sharing = 98274 > pages_unshared = 0 > pages_volatile = 29 > with THP, > pages_shared = 1 > pages_sharing = 8668 > pages_unshared = 0 > pages_volatile = 35 > > Finally, > A changes one page to 'e' > Then without THP, > pages_shared = 1 > pages_sharing = 98274 > pages_unshared = 1 > pages_volatile = 28 > with THP, > pages_shared = 1 > pages_sharing = 8163 > pages_unshared = 1 > pages_volatile = 27 > > Are those differences for pages_sharing between with and without THP > are expected? > > CAI Qian
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