[dpdk-dev] l3fwd error, port 0 is not present on the board

[Qiu, Michael]

On 1/2/2015 11:08 PM, Lyn M wrote:
> Neil, your patch works.  I am now able to run testpmd, as well as l3fwd
> with DPDK 1.8.0 and CONFIG_RTE_BUILD_COMBINE_LIBS=y.  Thank you much!
>
> In my original post, I thought my choice of hex portmask -p 0x3 was causing
> this issue -- now I know that was not the case.  But, I am still curious
> about how the hex portmask is determined.  Since I only have two ports
> bound to igb_uio, my hex postmask will always be 0x3?  What if I choose to
> bind other ports to igb_uio?  Is there a Linux command I can run to
> determine what mask to use with the -p option?

It is simply a mask used to enable or disable ports in DPDK.
For example:
If DPDK owns two ports, -p 0x03 means all two ports are enabled.
If DPDK owns four ports, -p 0x03 means only port 0 and 1 are enabled,
port 2 and 3 are unable to use. If you want to enable all ports, you
should use -p 0x0f

0x03 is 0b11, 0x0f is 0b1111

Thanks,
Michael
> Happy New Year --
> Lyn
>
> On Wed, Dec 31, 2014 at 10:00 PM, Neil Horman <nhorman at tuxdriver.com> wrote:
>
>> On Wed, Dec 31, 2014 at 10:37:45PM -0500, Neil Horman wrote:
>>> On Wed, Dec 31, 2014 at 10:50:10AM -0600, Lyn M wrote:
>>>> Neil,
>>>> When I build DPDK 1.8.0 with the default value
>> CONFIG_RTE_BUILD_COMBINE_LIBS=n,
>>>> I am able to run the testpmd successfully.  So, that does appear to be
>> the
>>>> culprit.
>>>> The objdump -t output for testpmd (with COMBINE_LIBS=n and
>> COMBINE_LIBS=y)
>>>> files are here:
>>>>
>> https://www.dropbox.com/sh/6os9yfn22jjcnmy/AAAjEV3u06XQ1t3UXdWcgru0a?dl=0
>>>> Thanks,
>>>> Lyn
>>>>
>>> I see the problem.  none of the constructors are included in the l3fwd
>> app.  I
>>> think you might need 174572477028b7f04700389e38f87d2ba01a0adc.  Its also
>>> possible something else has gone wrong withthe COMBINE_LIBS option.  Try
>>> building with the head of the tree, and if that doesn't fix it, we can
>> start
>>> debugging in earnest.
>>> Neil
>> Found the problem.  Please try this patch
>>
>>
>> diff --git a/mk/rte.app.mk b/mk/rte.app.mk
>> index e1a0dbf..40afb2c 100644
>> --- a/mk/rte.app.mk
>> +++ b/mk/rte.app.mk
>> @@ -61,6 +61,10 @@ ifeq ($(NO_AUTOLIBS),)
>>
>>  LDLIBS += --whole-archive
>>
>> +ifeq ($(CONFIG_RTE_BUILD_COMBINE_LIBS),y)
>> +LDLIBS += -l$(RTE_LIBNAME)
>> +endif
>> +
>>  ifeq ($(CONFIG_RTE_BUILD_COMBINE_LIBS),n)
>>
>>  ifeq ($(CONFIG_RTE_LIBRTE_DISTRIBUTOR),y)
>> @@ -251,10 +255,6 @@ build: _postbuild
>>
>>  exe2cmd = $(strip $(call dotfile,$(patsubst %,%.cmd,$(1))))
>>
>> -ifeq ($(CONFIG_RTE_BUILD_COMBINE_LIBS),y)
>> -LDLIBS += -l$(RTE_LIBNAME)
>> -endif
>> -
>>  ifeq ($(LINK_USING_CC),1)
>>  override EXTRA_LDFLAGS := $(call linkerprefix,$(EXTRA_LDFLAGS))
>>  O_TO_EXE = $(CC) $(CFLAGS) $(LDFLAGS_$(@)) \
>>