On Mon, 2007-08-20 at 02:52 +0200, Samuel Thibault wrote: > Samuel Thibault, le Mon 20 Aug 2007 02:18:44 +0200, a écrit : > > Samuel Thibault, le Mon 20 Aug 2007 02:06:18 +0200, a écrit : > > > int vm_object_cached_max = 200; /* may be patched*/ > > > > > > We should probably raise it in debian at least. > > > > I've made it 2000. > > That put a simple gnumach compilation time from 4m18 down to 3m48. The > number of cached objects indeed raised to 2000 during the compilation. > (note: these are the cached objects, not the currently used objects).
1: I think it should be raised in gnumach itself, not just in the Debian version. 2: It should be raised to be very high indeed; I think it should be considerably more than the number of currently used objects in a system under normal load; otherwise paging requires initializing the object, which is a pointless hit. 3: Doing (2), it seems to me, should best be done by something dynamic based upon the memory available to the kernel. Thomas
