Hi Christoffer,
This is change may not provide the measurable performance improvement,
but still we can
save a few cpu cycles on vCPU context switch and also improves the code
readability.
On 08/25/2016 08:31 AM, Christoffer Dall wrote:
Hi Shanker,
On Tue, Aug 09, 2016 at 08:15:36PM -0500, Shanker Donthineni wrote:
We are doing an unnecessary stack push/pop operation when restoring
the guest registers x0-x18 in __guest_enter(). This patch saves the
two instructions by using x18 as a base register. No need to store
the vcpu context pointer in stack because it is redundant and not
being used anywhere, the same information is available in tpidr_el2.
Does this have any measureable benefit?
Thanks,
-Christoffer
--
Shanker Donthineni
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
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