Re: [intel-sgx-kernel-dev] [PATCH v5 06/11] intel_sgx: driver for Intel Software Guard Extensions

Jarkko Sakkinen
2017-12-15T15:00:27Z

On Wed, Dec 13, 2017 at 11:18:29PM +0000, Christopherson, Sean J wrote:
> Resurrecting this thread now that I have a system with launch control
> and have been able to measure the performance impact...
>
> Regenerating the EINIT token every time adds somewhere in the vicinity
> of ~5% overhead to creating an enclave, versus generating a token once
> and reusing it in each EINIT call. This isn't a huge issue since real
> world usage models likely won't be re-launching enclaves at a high rate,
> but it is measurable.

We can cache tokens in future in the kernel space, can't we?

/Jarkko