On 7/20/2015 12:43 AM, Or Gerlitz wrote:
On Sun, Jul 19, 2015 at 7:07 PM, Sagi Grimberg <sagig@xxxxxxxxxxxxxxxxxx> wrote:
On 7/16/2015 6:25 PM, Bart Van Assche wrote:
I agree it would definitely help as the lack of immediate data
emphasizes the additional latency of doing rdma reads.
Sagi, do we have black box evidence from iSER showing notable
(results? setup?) IO latency improvement from using immediate data vs.
RDMA read?
I've seen it. The LIO target has a better write performance due to
ImmediateData. I also have a patch in the pipe that optimize the
this flow at the target side which improves up to 40% for 512B-8K IOs.
Sagi.
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