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On Tue, 2007-01-30 at 15:10, Satoshi Oshima wrote: > Martin Hunt wrote: > > Is there a reason why i386 kprobes are 2-3 times faster than x86_64 on > > 2.6.19? This is on the same hardware. Is djprobes only working on i386 > > or something? > > True. Kprobes for i386 has booster but for x86_64 doesn't have booster. > > Sorry that's my fault. > > Today, I rebase k*probe-booster x86_64 patch set to latest mm. > and now under testing. > > It will be posted as soon as it passes the tests. > > Satoshi It would be good for future k[ret]probe booster patches (and other performance patches) to include an appropriate patch to the "Probe Overhead" section of Documentation/kprobes.txt. You don't have to test on the same hardware we did; just specify the parameters of the hardware you used. The attached tarball contains the (ancient) test modules I used to get the performance numbers in kprobes.txt. Jim
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