在 2022/1/18 10:20, yangx.jy@xxxxxxxxxxx 写道:
On 2022/1/15 11:38, Yanjun Zhu wrote:
在 2022/1/12 11:58, yangx.jy@xxxxxxxxxxx 写道:
On 2022/1/12 9:19, Yanjun Zhu wrote:
在 2022/1/11 23:16, Haakon Bugge 写道:
On 11 Jan 2022, at 15:42, Yanjun Zhu <yanjun.zhu@xxxxxxxxx> wrote:
在 2022/1/10 13:17, yangx.jy@xxxxxxxxxxx 写道:
On 2022/1/7 19:49, Yanjun Zhu wrote:
It seems that it does not mean to check the last packet. It means
that
it receives a MSN response.
Hi Yanjun,
Checking the last packet is a way to indicate that responder has
completed an entire request(including multiple packets) and then
increases a msn.
Hi, Xiao
What does the msn mean?
Message Sequence Number.
Thanks, Haakon
I am reading the following from the spec.
"
C9-148: An HCA responder using Reliable Connection service shall
initialize
its MSN value to zero. The responder shall increment its MSN
whenever it has successfully completed processing a new, valid request
message. The MSN shall not be incremented for duplicate requests. The
incremented MSN shall be returned in the last or only packet of an RDMA
READ or Atomic response. For RDMA READ requests, the responder
may increment its MSN after it has completed validating the request and
before it has begun transmitting any of the requested data, and may
return
the incremented MSN in the AETH of the first response packet. The MSN
shall be incremented only once for any given request message.
"
It seems that the above describe how to handle MSN increment in
details.
Hi Yanjun,
Sorry for the late reply.
Right, 9.7.7.1 GENERATING MSN VALUE section explains Message Sequence
"
...
Since the responder may choose to coalesce acknowledges, a single
response packet may in fact acknowledge
several request messages. Thus, when it receives a new MSN, the
requester begins evaluating WQEs on its send queue beginning with the
oldest outstanding WQE and progressing forward.
...
"
In the above, several request messages come. From the SPEC, msn should
increase based on the number of request messages.
Can your commit handle the above case?
Zhu Yanjun
Does your commit take into account of duplicate requests?
Hi Yanjun,
Responder will check duplicate requests by check_psn() and process them
by duplicate_request().
According to the logic of duplicate_request(), responder doesn't
increase msn for duplicate requests.
Best Regards,
Xiao Yang
Zhu Yanjun
Number(MSN).
Best Regards,
Xiao Yang
Zhu Yanjun
Thxs, Håkon
Thanks a lot.
Zhu Yanjun
Best Regards,
Xiao Yang
