Re: Question about Valgrind tool in Intel new platform
Yang Zhong <[email protected]>
| Newsgroups | gmane.comp.debugging.valgrind |
|---|---|
| Message-ID | <20220420121807.GA8919@yangzhon-Virtual> |
On Wed, Apr 20, 2022 at 09:37:17AM +0100, Tom Hughes wrote: > On 20/04/2022 09:01, Yang Zhong wrote: > > >So, from above issue in Intel new platform, the valgrind need do some enablings to be compatible > >with on new platform? Seems valgrind tool can't identify the real HW platform because cpuid can't > >read correct register value. thanks! > > When running under valgrind you are running on an emulated CPU not > the real CPU and the results of cpuid will reflect the capabilities > of that emulated CPU rather than the real CPU. > > Do the bits that you are trying to check reflect something (like new > instructions) that valgrind will need to be concerned about? > Thanks Tom for your quickly response! The AMX is the NEW feature in Intel new platform and from host, we can find below cpu flags: amx_bf16, amx_tile, amx_int8 The SPEC can be found in: https://software.intel.com/content/dam/develop/external/us/en/documents/architecture-instruction-set-extensions-programming-reference.pdf The issue I mentioned should be related with AMX features missed in valgrind emulated CPU. If someone will implement this feature on valgrind, I can help verify. Thanks! Yang > Tom > > -- > Tom Hughes ([email protected]) > http://compton.nu/