Re: X86_64 Ctx switch times - 32bit vs 64bit

[Andi Kleen]

> samples  %        symbol name
> 20820    11.5424  copy_user_generic_c
> 12990     7.2015  ia32_syscall
> 10131     5.6165  gs_change
> 9053      5.0189  __dequeue_signal
> 7494      4.1546  find_pid

Context switch does not even appear. Probably the i386 glibc does
something much slower than 64bit. I would compare straces.

-Andi
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