Re: [RFC PATCH 9/9] powerpc: rewrite local_t using soft_irq

On Mon, 25 Jul 2016 20:22:22 +0530
Madhavan Srinivasan [off-list ref] wrote:

https://lkml.org/lkml/2008/12/16/450

Modifications to Rusty's benchmark code:
 - Executed only local_t test

Here are the values with the patch.

Time in ns per iteration

Local_t		Without Patch		With Patch

_inc			28		8
_add			28		8
_read			3		3
_add_return		28		7

Tested the patch in a
 - pSeries LPAR (with perf record)

Very nice. I'd like to see these patches get in. We can
probably use the feature in other places too.

Thanks,
Nick