[dpdk-dev] Problem while running dpdk

[dpdk-dev] Problem while running dpdk

[Raunak Laddha]

[-- Attachment #1: Type: text/plain, Size: 1028 bytes --]

Hello,
I am using dpdk 20.11.1 . I tried to use your resource to build a custom application which uses dpdk. I compiled my app using meson and makefile to see if I get different result for my issue. I have used pkg-config to load cflags and ldflags in my application and linking it as a static library.
Problem I am facing:
No buses are loaded. I can see that RTE_INIT_PRIO is used as constructor to load the buses. But in my application, buses are not loaded.
I tried to run the dpdk app named test-pipeline to check if it works and it does in that case. But same application with my makefile or meson file does not work.
First call in my program is rte_eal_init(argc, argv); (the init call of dpdk).
My app gets compiles. Also verified cflags and ldflags to check if dpdk flags are added.
My assumption is whatever RTE_INIT_PRIO is loading, it gets loaded correctly in dpdk test-pipeline app but not in my custom app.
Is there any config I am missing?
I have attached the makefile and meson file.

Thanks,
Raunak

[-- Attachment #2: test.c --]
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#include <stdio.h>
#include <rte_eal.h>

int main(int argc, char **argv) {
    rte_eal_init(argc, argv);
    return 0;
}

Re: [dpdk-dev] Problem while running dpdk

[Bruce Richardson]

On Thu, May 27, 2021 at 10:05:39PM +0000, Raunak Laddha wrote:
> Hello,
> I am using dpdk 20.11.1 . I tried to use your resource to build a custom application which uses dpdk. I compiled my app using meson and makefile to see if I get different result for my issue. I have used pkg-config to load cflags and ldflags in my application and linking it as a static library.
> Problem I am facing:
> No buses are loaded. I can see that RTE_INIT_PRIO is used as constructor to load the buses. But in my application, buses are not loaded.
> I tried to run the dpdk app named test-pipeline to check if it works and it does in that case. But same application with my makefile or meson file does not work.
> First call in my program is rte_eal_init(argc, argv); (the init call of dpdk).
> My app gets compiles. Also verified cflags and ldflags to check if dpdk flags are added.
> My assumption is whatever RTE_INIT_PRIO is loading, it gets loaded correctly in dpdk test-pipeline app but not in my custom app.
> Is there any config I am missing?
> I have attached the makefile and meson file.
> 
> Thanks,
> Raunak

Hi Raunak,

I'm afraid that the attachments got stripped on the email. To help resolve
the problem you encountered, the first thing to check would be the actual
link-command used when linking your app. Check that the drivers are being
linked into the static binary appropriately.  Also, depending on the Linux
distro in use, some versions of pkg-config have a problem with reordering
the linker flags, so I'd recommend installing and using pkgconf package
rather than pkg-config to remove this as a source of error.

Regards,
/Bruce

Re: [dpdk-dev] [External] : Re: Problem while running dpdk

[Raunak Laddha]

Hi Bruce,
Thank you for giving solution to my problem. I will try it and let you know if it works or not.

Thanks,
Raunak
________________________________
From: Bruce Richardson <bruce.richardson@intel.com>
Sent: Tuesday, June 1, 2021 4:03 AM
To: Raunak Laddha <raunak.laddha@oracle.com>
Cc: dev@dpdk.org <dev@dpdk.org>; Mike Banatt <mike.banatt@oracle.com>
Subject: [External] : Re: [dpdk-dev] Problem while running dpdk

On Thu, May 27, 2021 at 10:05:39PM +0000, Raunak Laddha wrote:
> Hello,
> I am using dpdk 20.11.1 . I tried to use your resource to build a custom application which uses dpdk. I compiled my app using meson and makefile to see if I get different result for my issue. I have used pkg-config to load cflags and ldflags in my application and linking it as a static library.
> Problem I am facing:
> No buses are loaded. I can see that RTE_INIT_PRIO is used as constructor to load the buses. But in my application, buses are not loaded.
> I tried to run the dpdk app named test-pipeline to check if it works and it does in that case. But same application with my makefile or meson file does not work.
> First call in my program is rte_eal_init(argc, argv); (the init call of dpdk).
> My app gets compiles. Also verified cflags and ldflags to check if dpdk flags are added.
> My assumption is whatever RTE_INIT_PRIO is loading, it gets loaded correctly in dpdk test-pipeline app but not in my custom app.
> Is there any config I am missing?
> I have attached the makefile and meson file.
>
> Thanks,
> Raunak

Hi Raunak,

I'm afraid that the attachments got stripped on the email. To help resolve
the problem you encountered, the first thing to check would be the actual
link-command used when linking your app. Check that the drivers are being
linked into the static binary appropriately.  Also, depending on the Linux
distro in use, some versions of pkg-config have a problem with reordering
the linker flags, so I'd recommend installing and using pkgconf package
rather than pkg-config to remove this as a source of error.

Regards,
/Bruce