[rds-devel] Help with sample RDS RDMA code by Jon

[Milind Dumbare]

Hi Pierre,

I checked out latest sources from. *git://oss.oracle.com/git/rds-tools.git
<http://oss.oracle.com/git/rds-tools.git>*

It say its 2.0.7 but not sure if its "1.10" or "1.12". Can you point me to
the sources/binaries for 2.0.7-1.12

*One more thing. In following code setsockopt() returns -1 and errno
-ENOPROTOOPT. Does that mean I have setup issues with my infiniband stack
and it does not support RDMA/zero copy.*

fd = socket(PF_RDS, SOCK_SEQPACKET, 0);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = inet_addr(address);
sin.sin_port = TESTPORT;
*setsockopt(fd, sol, RDS_FREE_MR, &args, sizeof(args))*

I see rds-stress checks this at rds-stress.c:2802 to check if rdma is
supported or not.
Do we have any other way to check if zero copy RDMA is setup properly.

Thanks,
-Milind


On Mon, Mar 24, 2014 at 6:26 PM, pierre orzechowski <
pierre.e.orzechowski at oracle.com> wrote:

>  Hi Milind,
>
> Do yo have the rds-tools package already to run rds-stress ?
> The most form of RDMA test is :
> server : rds-stress -r <server_IPoIB_IP>
> client : rds-stres -r <client_IPoIB_IP> -s <server_IPoIB_IP> -D 8k
>
> If you are using the 2.6.39-113.1 kernel onwards, I believe there was a
> kernel fix that exposed a flaw in rds-stress.
>  "Don't check for msg_namelen for Control msgs" is fixed in rds-tools
> 2.0.7-1.10.
>  2.0.7-1.12 is recommended.
>
> Thanks,
> Pierre
>
>
> On 3/24/2014 10:08 AM, Pierre Orzechowski wrote:
>
> Sure, wii do.
>
> Thanks,
> Pierre
>
> On Mar 24, 2014, at 9:17 AM, Sumanta Chatterjee <
> sumanta.chatterjee at oracle.com> wrote:
>
>   Hi Pierre,
>
> Can you respond to this question.  Thanks.
>
>
>
> -------- Original Message --------  Subject: Re: [rds-devel] Help with
> sample RDS RDMA code by Jon  Date: Mon, 24 Mar 2014 12:43:33 +0100  From: Milind
> Dumbare <milind at linux.com> <milind at linux.com>  To: rds-devel
> <rds-devel at oss.oracle.com> <rds-devel at oss.oracle.com>
>
> Hello,
>
>  Anyone actively using/developing application on RDS? Especially the zero
> copy RDMA area? I need help running basic things like rds-stress.
>
>  Thanks,
>  -Milind
>
>
> On Wed, Feb 19, 2014 at 1:40 PM, Milind Dumbare <milind at linux.com> wrote:
>
>>  Hi,
>>
>>  I was trying to run sample example to to RDS RDMA communication. But I
>> can't make it work. Following thing works great on without "--rdma" on
>> rds_tcp stack. I do have infiniband and "rds_ping" is working on it.
>>
>>  If you have any other sample code which can run RDS RDMA please give me
>> the pointers.
>>
>>  On Server:
>> ./a.out --rdma -s 192.168.16.2
>>
>>  On client
>> ./a.out --rdma -s 192.168.16.2 -c 192.168.16.1
>>
>>  And the Client says it sent the packet over RDMA but Server prints
>> blank payload and then exits. While client is waiting on the recvmsg()
>>  call.
>>
>>  This is probably because of the following code
>>
>>  156: if (msg.msg_controllen) {
>> 157:               rc = do_rdma_read(sock, &msg, buf);
>>
>>  Server never gets non-zero "msg.msg_controllen" and it never goes and
>> runs "do_rdma_read()".
>>
>>  Please help.
>>
>>  Thanks,
>> -Milind
>>
>
>
>
>   <Attached Message Part>
>
>
>
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