From: Jon Mason <jdmason@kudzu.us>
To: Allen Hubbe <Allen.Hubbe@emc.com>
Cc: 'Dave Jiang' <dave.jiang@intel.com>, linux-ntb@googlegroups.com
Subject: Re: [PATCH v6] ntb: ntb perf tool
Date: Sun, 17 Jan 2016 22:18:19 -0500 [thread overview]
Message-ID: <20160118031818.GA11303@kudzu.us> (raw)
In-Reply-To: <000201d14ee4$93e3e0b0$bbaba210$@emc.com>
On Thu, Jan 14, 2016 at 10:59:40AM -0500, Allen Hubbe wrote:
> > From: Dave Jiang <dave.jiang@intel.com>
> > Sent: Wednesday, January 13, 2016 3:30 PM
> > To: Hubbe, Allen; jdmason@kudzu.us
> > Cc: linux-ntb@googlegroups.com
> > Subject: [PATCH v6] ntb: ntb perf tool
> >
> > Providing raw performance data via a tool that directly access data from
> > NTB w/o any software overhead. This allows measurement of the hardware
> > performance limit. In revision one we are only doing single direction
> > CPU and DMA writes. Eventually we will provide bi-directional writes.
> >
> > The measurement using DMA engine for NTB performance measure does
> > not measure the raw performance of DMA engine over NTB due to software
> > overhead. But it should provide the peak performance through the Linux
> > DMA
> > driver.
> >
> > Signed-off-by: Dave Jiang <dave.jiang@intel.com>
>
> Tested-by: Allen Hubbe <Allen.Hubbe@emc.com>
Pulled in, thanks.
>
> This driver seems to work as described. My performance results were lower than expected, but I tested on a nonstandard ntb config.
>
> Allen
>
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next prev parent reply other threads:[~2016-01-18 3:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-14 15:59 [PATCH v6] ntb: ntb perf tool Allen Hubbe
2016-01-18 3:18 ` Jon Mason [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-01-13 20:29 Dave Jiang
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