[dpdk-dev] [PATCH] eal/ppc64: revert implement arch-specific TSC freq query

Chao Zhu chaozhu at linux.vnet.ibm.com
Wed Feb 7 08:05:06 CET 2018


The previous patch has some misunderstanding of the the TSC frequency
counting.
I support this.

> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas at monjalon.net]
> Sent: 2018年2月1日 8:30
> To: Gowrishankar <gowrishankar.m at linux.vnet.ibm.com>; Chao Zhu
> <chaozhu at linux.vnet.ibm.com>
> Cc: dev at dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] eal/ppc64: revert implement arch-specific
TSC
> freq query
> 
> 30/01/2018 09:59, Gowrishankar:
> > From: Gowrishankar Muthukrishnan <gowrishankar.m at linux.vnet.ibm.com>
> >
> > This reverts commit 15692396fd68932b6a81f00f12d4b0da12baa7d3
> > (eal/ppc64: implement arch-specific TSC freq query). We intended to
> > derive pkt/sec estimation with cpu clock frequency. As timebase
> > register serves the timer purpose, we need to stick with it for
> > calculating pkt/sec, hence reverting the change.
> >
> > Fixes: 15692396fd (eal/ppc64: implement arch-specific TSC freq query)
> 
> It is not clear what it is fixing.
> 
> Chao, please review.




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