At Sat, 05 Nov 2005 12:49:46 -0500, Jonathan S. Shapiro wrote: > 1. Self-paging introduces a known, surprisingly high-bandwidth > communication channel. > > Actually, this is not correctly stated. There is no problem with > paging against your own pages and deciding which of your pages to > unbind when you do. The problem lies in any system where the system > asks you to alter your residency properties -- this is the source > of the communication channel.
I'm having difficulty understanding the implication of this communication channel. It seems to me that using the L1 or L2 cache would be a much higher bandwidth communication channel. What I'm thinking of is that two confined tasks, A and B, want to communicate. So, A floods a cache color and B samples the different colors to determine which color is least responsive. Basically, I don't understand why this particular channel is so bad. Thanks, Neal _______________________________________________ L4-hurd mailing list [email protected] http://lists.gnu.org/mailman/listinfo/l4-hurd
