Daniel Jacobowitz a écrit :
Straight qemu with my previously posted MIPS patches takes 6:13 to
start and reboot a MIPS userspace (through init, so lots of fork/exec).
Thiemo's patch, which flushes the whole jump buffer, cuts it to 1:40.
A patch which finds the entries which need to be flushed more
efficiently cuts it to 1:21.
A patch which flushes up to 1/32nd of the jump buffer indiscriminately
cuts it to 1:11-1:13.
Warning: I don't know anything about the Qemu MMU implementation
so this question is perhaps stupid :)
Did you try to benchmark some user space applications with the
various implementations you propose? The boot of a Linux kernel
is quite heavy on various kinds of flushes and so is very
different from "standard" applications.
Laurent
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