Thanks all for these precisions. I have deployed OpenMPI myself. So I have to build it again, disabling AVX512 optimizations. This level of optimization is used in all our CFD codes and libraries as it improve the global code performances.
Patrick Le 26/05/2020 à 10:45, Tom Hughes a écrit : > Sorry, I misunderstood what you meant by "as previous version" there. > > I thought you meant the previous version worked but you actually > meant that it failed. > > As Julian says there is no easy fix - you have a library installed > that has been compiled to assume certain instructions are available > that are not in fact available under valgrind at the moment. > > Tom > > On 26/05/2020 09:26, Patrick Bégou wrote: >> Hi Tom, >> >> I'm a new user of Valgrind. I was needing it to check a large mpi code. >> So I downloaded 3.15 version but even if hardware and software are 2 to >> 3 years old, valgrind does'nt work for me. >> Nor gcc7, nor OpenMPI, nor my application (even the small test) used >> specific option when they were built. >> >> If this unsupported instruction (I do not know what is an EVEX prefix, >> sorry) is the problem, how can I avoid it to use valgrind ? >> >> I was just thinking that 3.16 could solve my problem.... >> >> Patrick >> >> >> >> Le 26/05/2020 à 10:12, Tom Hughes a écrit : >>> On 26/05/2020 09:06, Patrick Bégou wrote: >>> >>>> valgrind-3.16.0.RC2 doesn't work for me (as previous version on this >>>> server). >>> >>> Are you saying that it fails on a binary that worked before? >>> >>>> vex amd64->IR: unhandled instruction bytes: 0x62 0xF1 0xFD 0x8 0x6F >>>> 0x5 0x25 0xA8 0x18 0x0 >>>> vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0 >>>> vex amd64->IR: VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=NONE >>>> vex amd64->IR: PFX.66=0 PFX.F2=0 PFX.F3=0 >>>> ==306850== valgrind: Unrecognised instruction at address 0x6ddf581. >>>> vex amd64->IR: unhandled instruction bytes: 0x62 0xF1 0xFD 0x8 0x6F >>>> 0x5 0x25 0xA8 0x18 0x0 >>>> vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0 >>>> vex amd64->IR: VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=NONE >>>> vex amd64->IR: PFX.66=0 PFX.F2=0 PFX.F3=0 >>> >>> Because this is an instruction with an EVEX prefix that is not >>> supported by any version of valgrind ever so I don't see how this >>> binary can have worked with the previous version of valgrind. >>> >>> I suspect that you have in fact recompiled the program with >>> a different compiler or different optimization settings since >>> the time when it worked? >>> >>> Tom >>> >> >> >> >> _______________________________________________ >> Valgrind-users mailing list >> Valgrind-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/valgrind-users >> > > _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
