Hi Konstantin,
On 02/09/2015 04:43 PM, Ananyev, Konstantin wrote:
>> The ring library was designed with the assumption that the code is not
>> preemptable. The code is lock-less but not wait-less. Actually, if the
>> code is preempted at a bad moment, it can spin forever until it's
>> unscheduled.
Hi Olivier,
> -Original Message-
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Olivier MATZ
> Sent: Friday, February 06, 2015 3:20 PM
> To: Liang, Cunming; dev at dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v4 16/17] ring: add sched_yield to avoid spin
&g
Hi,
On 02/02/2015 03:02 AM, Cunming Liang wrote:
> Add a sched_yield() syscall if the thread spins for too long, waiting other
> thread to finish its operations on the ring.
> That gives pre-empted thread a chance to proceed and finish with ring
> enqnue/dequeue operation.
> The purpose is to re
Add a sched_yield() syscall if the thread spins for too long, waiting other
thread to finish its operations on the ring.
That gives pre-empted thread a chance to proceed and finish with ring
enqnue/dequeue operation.
The purpose is to reduce contention on the ring.
Signed-off-by: Cunming Liang
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