[dpdk-dev] [PATCH v3 1/6] eal: add power management intrinsics

[Liang, Ma]

Hi Stephen, 
   v4 patch will include the l3fwd-power udpate.
Regards
Liang

On 04 Sep 09:37, Stephen Hemminger wrote:
> On Fri,  4 Sep 2020 11:18:55 +0100
> Liang Ma <liang.j.ma at intel.com> wrote:
> 
> > Add two new power management intrinsics, and provide an implementation
> > in eal/x86 based on UMONITOR/UMWAIT instructions. The instructions
> > are implemented as raw byte opcodes because there is not yet widespread
> > compiler support for these instructions.
> > 
> > The power management instructions provide an architecture-specific
> > function to either wait until a specified TSC timestamp is reached, or
> > optionally wait until either a TSC timestamp is reached or a memory
> > location is written to. The monitor function also provides an optional
> > comparison, to avoid sleeping when the expected write has already
> > happened, and no more writes are expected.
> > 
> > Signed-off-by: Liang Ma <liang.j.ma at intel.com>
> > Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
> 
> This looks like a useful feature but needs more documentation and example.
> It would make sense to put an example in l3fwd-power. 
>