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> 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
>>
>>
>>
>>
>
>
-=-=-=-=-=-=-=-=-=-=-=-
Links: You receive all messages sent to this group.
View/Reply Online (#16181): https://lists.fd.io/g/vpp-dev/message/16181
Mute This Topic: https://lists.fd.io/mt/73327785/21656
Group Owner: vpp-dev+ow...@lists.fd.io
Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
