Ouch, preparing patch!
Florin
> On Apr 28, 2020, at 12:50 PM, Damjan Marion <dmar...@me.com> wrote:
>
>
> Looks like you told compiler that svm_fifo_t will be always cacheline aligned:
>
> typedef struct _svm_fifo
> {
> CLIB_CACHE_LINE_ALIGN_MARK (shared_first);
>
>
> but you increment pointer for something that it is not X*64:
>
> fmem += hdrs + rounded_data_size;
>
> So clang caught you cheating :)
>
> —
> Damjan
>
>
>
>> On 28 Apr 2020, at 21:25, Florin Coras <fcoras.li...@gmail.com
>> <mailto:fcoras.li...@gmail.com>> wrote:
>>
>> Hi Damjan,
>>
>> Just tried the vcl tests and the debug version works just fine. The release
>> images crash (at least in the test I’m looking at) doing:
>>
>> memset (f, 0, sizeof (*f))
>>
>> From gdb:
>>
>> (gdb) x/i $pc
>> => 0x7f15fcd329f4 <fs_try_alloc_fifo_batch+388>: movaps
>> %xmm0,0x1f0(%rdi,%rbp,1)
>> (gdb) i r rdi
>> rdi 0x204024780 8657192832
>> (gdb) i r rbp
>> rbp 0x100018 0x100018
>> (gdb) p f
>> $7 = (svm_fifo_t *) 0x204024780 <- the thing being memset
>>
>> If my math is correct, the right hand operator is 0x1f0 + 0x204024780 +
>> 0x100018 = 0x204124988. Doesn’t look to be aligned. Could this be the issue?
>>
>> Florin
>>
>>> On Apr 28, 2020, at 7:13 AM, Damjan Marion via lists.fd.io
>>> <dmarion=me....@lists.fd.io> wrote:
>>>
>>>
>>> Folks,
>>>
>>> As there is bug in gnu assembler which is shipping with ubuntu 18.04 we are
>>> not able to produce working binaries with avx512 instruction set.
>>> Because of that, I had to change default to avx2. reported bug[1], but it
>>> is ignored for a year.
>>>
>>> As alternative[2], I wanted to consider using clang-9 which is shipped with
>>> ubuntu 18.04 and seems like it is even capable of producing faster binaries
>>> than gcc.
>>> Unfortunately, "make test" is failing at several places including vxlan,
>>> ipsec and tcp stack[3].
>>>
>>> May I ask folks who “own” that code to take a quick look?
>>>
>>> Thanks,
>>>
>>> Damjan
>>>
>>> [1] https://bugs.launchpad.net/ubuntu/cosmic/+source/binutils/+bug/1819961
>>> [2] https://gerrit.fd.io/r/c/vpp/+/26744
>>> [3] https://jenkins.fd.io/job/vpp-verify-master-ubuntu1804/3615/console
>>>
>>>
>>>
>>>
>>
>>
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