[ofiwg] libfabric fi_getinfo question

[Vasiliy Tolstov]

16 июля 2015 г. 20:54 пользователь "Jose, Jithin" <jithin.jose at intel.com>
написал:
>
> Hi Vasiliy,
>
> The example looks fine, and the verbs provider should be able to give
> valid output for fi_getinfo.
> In fact, we tried this example with verbs provider and it gave valid
> fi_info.
> So, could the failure be because the node name is not resolvable or
> something?
> If the issue still exists, we can create an issue in github as Dave
> mentioned.
>
>
> One anomaly we noticed is that verbs provider currently returns with
> FI_SOCKADDR_IN address format, even though the requested format is
> different.
> But, this should not result in returning -FI_EINVAL.
>
> - Jithin
>
>

I think in you test you have working Ethernet or ipoib network. But I need
pure rdma resolving.
So as I see libfabric and rdma_cm writes something to /sys and fallback to
DNS requests via Ethernet,and with absence Ethernet exit with error.

>
>
> -----Original Message-----
> From: <ofiwg-bounces at lists.openfabrics.org> on behalf of Vasiliy Tolstov
> <v.tolstov at selfip.ru>
> Date: Thursday, July 16, 2015 at 2:14 AM
> To: ofiwg <ofiwg at lists.openfabrics.org>
> Subject: [ofiwg] libfabric fi_getinfo question
>
> >Hello, i'm try to understand usage of libfabric and stuc at simple
> >example, it returns
> >fi_getinfo(): info.c:34, ret=-22 (Invalid argument)
> >
> >i'm try to resolve local node address with hostname =
> >cn33.z1.mn2.simplecloud.ru and node_desc = cn33.z1.mn2.simplecloud.ru
> >
> >P.S does it possible to resolve node address via libfabric that
> >entered in node_desc
>
>(/sys/devices/pci0000:00/0000:00:02.0/0000:02:00.0/infiniband/mlx4_0/node_
> >desc)
> >
> >int main(int argc, char **argv) {
> >        int ret;
> >        hints = fi_allocinfo();
> >        if (hints == NULL) {
> >          fprintf(stderr, "%s\n", "failed to alloc info");
> >          return -1;
> >        }
> >        hints->addr_format = FI_SOCKADDR_IB;
> >        ret = fi_getinfo(FI_VERSION(1, 0),
> >"cn33.z1.mn2.simplecloud.ru", NULL, 0, hints, &fi);
> >        if (ret < 0) {
> >                FT_PRINTERR("fi_getinfo", ret);
> >                return ret;
> >        }
> >        if (fi == NULL) {
> >                fprintf(stderr, "%s\n", "failed to get info");
> >                return -1;
> >        }
> >        for (rp = fi; rp != NULL; rp = rp->next) {
> >                if (rp->addr_format == FI_SOCKADDR_IB) {
> >                        addrlen = fi->dest_addrlen;
> >                        remote_addr = malloc(addrlen);
> >                        memcpy(remote_addr, fi->dest_addr, addrlen);
> >                }
> >        }
> >        fi_freeinfo(fi);
> >        return 0;
> >}
> >
> >
> >--
> >Vasiliy Tolstov,
> >e-mail: v.tolstov at selfip.ru
> >_______________________________________________
> >ofiwg mailing list
> >ofiwg at lists.openfabrics.org
> >http://lists.openfabrics.org/mailman/listinfo/ofiwg
>
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