From: "Allen Hubbe" <Allen.Hubbe@emc.com>
To: 'Dave Jiang' <dave.jiang@intel.com>, jdmason@kudzu.us
Cc: linux-ntb@googlegroups.com
Subject: RE: [PATCH v6] ntb: ntb perf tool
Date: Thu, 14 Jan 2016 10:59:40 -0500 [thread overview]
Message-ID: <000201d14ee4$93e3e0b0$bbaba210$@emc.com> (raw)
> 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>
This driver seems to work as described. My performance results were lower than expected, but I tested on a nonstandard ntb config.
Allen
next reply other threads:[~2016-01-14 16:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-14 15:59 Allen Hubbe [this message]
2016-01-18 3:18 ` [PATCH v6] ntb: ntb perf tool Jon Mason
-- strict thread matches above, loose matches on Subject: below --
2016-01-13 20:29 Dave Jiang
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