Messages in this thread |  | | From | Greg Lindahl <> | | Subject | Re: 2.2.5 optimizations for web benchmarks? | | Date | Thu, 29 Apr 1999 20:22:04 -0400 (EDT) |
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> Yes, but the amount of memory you touch is not simply related to the > number of TLBs. You're probably going to take an exit path out of the > kernel which returns through 3 or 4 levels of function calls all over > the kernel.
User programs do occasionally access memory, above and beyond what the kernel uses...
> In other words, the problem with TLB refill costs is that even a small > amount of code/data reference is going to touch many TLBs
Fine. Are you then claiming that it's impossible for a program to touch a lot more than the minimum number of TLB entries, or are you claiming that you think this is a big effect even for apache due to the mandatory hits? The first is clearly not true (I write programs which are extremely TLB-intensive); the second I have no idea about.
-- g
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