* Some question about the switch ports' LinkSpeed
@ 2010-01-04 13:58 王允彬
[not found] ` <91fe68d51001040558w5f79e6adw8d0af15758e4d9fc-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: 王允彬 @ 2010-01-04 13:58 UTC (permalink / raw)
To: linux-rdma-u79uwXL29TY76Z2rM5mHXA
Now I have a Infiniband switch with the rate of a port 20Gb/s.
But my experiment can only work below the LinkSpeed of 1Gb/s.
Is there some methods to limit the rate of the switch. Can QoS work out ?
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^ permalink raw reply [flat|nested] 2+ messages in thread[parent not found: <91fe68d51001040558w5f79e6adw8d0af15758e4d9fc-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>]
* Re: Some question about the switch ports' LinkSpeed [not found] ` <91fe68d51001040558w5f79e6adw8d0af15758e4d9fc-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> @ 2010-01-05 8:02 ` Yevgeny Kliteynik 0 siblings, 0 replies; 2+ messages in thread From: Yevgeny Kliteynik @ 2010-01-05 8:02 UTC (permalink / raw) To: 王允彬; +Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA Hi, On 04/Jan/10 15:58, 王允彬 wrote: > Now I have a Infiniband switch with the rate of a port 20Gb/s. > But my experiment can only work below the LinkSpeed of 1Gb/s. > Is there some methods to limit the rate of the switch. The lowest possible rate in IB is 1x SDR, which is 2.5 Gb/s. What exactly do you want to limit? What is the test doing? Do you have control over that code that generates the traffic? > Can QoS work out ? QoS (i.e. VL arbitration) kicks in only when the link is saturated. QoS doesn't have an ability to limit the BW. It can only limit relative BW part among several streams. -- Yevgeny > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-01-04 13:58 Some question about the switch ports' LinkSpeed 王允彬
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2010-01-05 8:02 ` Yevgeny Kliteynik
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