Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-12 Thread Ananyev, Konstantin
> 11/11/2018 15:15, Ananyev, Konstantin: > > Hi Thomas, > > > > > Below is my conclusion for this bug. > > > An expert of x86 is required to follow-up. > > > > > > Summary: > > > - CPU: Intel Skylake > > > - Linux environment: Ubuntu 18.04 > > > - Compiler: GCC 7 or 8 > > > - Scenario: te

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-12 Thread Thomas Monjalon
12/11/2018 10:09, Christian Ehrhardt: > > -vmovdqu8 xmm0,XMMWORD PTR [rax*8+0x6] > > +vmovdqu xmm0,XMMWORD PTR [rax*8+0x60] > > vinserti128 ymm0,ymm0,XMMWORD PTR [rax*8+0x70],0x1 > > vmovups XMMWORD PTR [rsi+0x60],xmm0 > > vextracti128 XMMWORD PTR [rsi+0x70],ymm0,0x1 > > > >

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-12 Thread Christian Ehrhardt
> -vmovdqu8 xmm0,XMMWORD PTR [rax*8+0x6] > +vmovdqu xmm0,XMMWORD PTR [rax*8+0x60] > vinserti128 ymm0,ymm0,XMMWORD PTR [rax*8+0x70],0x1 > vmovups XMMWORD PTR [rsi+0x60],xmm0 > vextracti128 XMMWORD PTR [rsi+0x70],ymm0,0x1 > > > Not sure what causing compiler behaves that way. >

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-11 Thread Thomas Monjalon
11/11/2018 15:15, Ananyev, Konstantin: > Hi Thomas, > > > Below is my conclusion for this bug. > > An expert of x86 is required to follow-up. > > > > Summary: > > - CPU: Intel Skylake > > - Linux environment: Ubuntu 18.04 > > - Compiler: GCC 7 or 8 > > - Scenario: testpmd crashes

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-11 Thread Ananyev, Konstantin
Hi Thomas, > > Below is my conclusion for this bug. > An expert of x86 is required to follow-up. > > Summary: > - CPU: Intel Skylake > - Linux environment: Ubuntu 18.04 > - Compiler: GCC 7 or 8 > - Scenario: testpmd crashes when it starts forwarding > - Behaviour: A

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-09 Thread Thomas Monjalon
Below is my conclusion for this bug. An expert of x86 is required to follow-up. Summary: - CPU: Intel Skylake - Linux environment: Ubuntu 18.04 - Compiler: GCC 7 or 8 - Scenario: testpmd crashes when it starts forwarding - Behaviour: AVX2 version of rte_memc

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-09 Thread Ferruh Yigit
On 11/9/2018 2:27 PM, Thomas Monjalon wrote: > 09/11/2018 14:17, Thomas Monjalon: >> 09/11/2018 11:03, Ferruh Yigit: >>> On 11/8/2018 11:01 PM, Yongseok Koh wrote: > On Nov 8, 2018, at 9:21 AM, Ferruh Yigit wrote: > > On 11/8/2018 3:59 PM, Thomas Monjalon wrote: >> Hi, >>

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-09 Thread Thomas Monjalon
09/11/2018 14:17, Thomas Monjalon: > 09/11/2018 11:03, Ferruh Yigit: > > On 11/8/2018 11:01 PM, Yongseok Koh wrote: > > > > > >> On Nov 8, 2018, at 9:21 AM, Ferruh Yigit wrote: > > >> > > >> On 11/8/2018 3:59 PM, Thomas Monjalon wrote: > > >>> Hi, > > >>> > > >>> We need to gather more informatio

Re: [dpdk-dev] [dpdk-stable] AVX512 bug on SkyLake

2018-11-09 Thread Thomas Monjalon
09/11/2018 11:03, Ferruh Yigit: > On 11/8/2018 11:01 PM, Yongseok Koh wrote: > > > >> On Nov 8, 2018, at 9:21 AM, Ferruh Yigit wrote: > >> > >> On 11/8/2018 3:59 PM, Thomas Monjalon wrote: > >>> Hi, > >>> > >>> We need to gather more information about this bug. > >>> More below. > >>> > >>> 07/11