Re: Peculiar problem with kmail on AMD64 current

[Dave Tyson <dtyson%anduin.org.uk@localhost>]

On Monday 06 February 2017 09:44:17 Martin Husemann wrote:
> On Sun, Feb 05, 2017 at 06:51:19PM +0000, Dave Tyson wrote:
> > So it would appear that a userland program which should be insulated
> > from the underlying hardware by the kernel is being affected by different
> > H/W.
> Can you show the output from
> 
> 	cpuctl identify 0
> 
> on both machines?
> 
> Some userland software detects cpu features at build time and hard codes
> that decsion into the binaries. This is a bug, of course.
> 
> Martin


Hi Martin,

Idents below.

Laptop which works:

laptoproot(laptop)root$ cpuctl identify 0
cpu0: highest basic info 0000000d
cpu0: highest extended info 80000008
cpu0: "Intel(R) Core(TM)2 Duo CPU     P8600  @ 2.40GHz"
cpu0: Intel Xeon 31xx, 33xx, 52xx, 54xx, Core 2 Quad 8xxx and 9xxx (686-
class), 2394.13 MHz
cpu0: family 0x6 model 0x17 stepping 0xa (id 0x1067a)
cpu0: features 
0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE>
cpu0: features 0xbfebfbff<MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2>
cpu0: features 0xbfebfbff<SS,HTT,TM,SBF>
cpu0: features1 0xc08e3fd<SSE3,DTES64,MONITOR,DS-CPL,VMX,SMX,EST,TM2,SSSE3>
cpu0: features1 0xc08e3fd<CX16,xTPR,PDCM,SSE41,XSAVE,OSXSAVE>
cpu0: features2 0x20000800<SYSCALL/SYSRET,EM64T>
cpu0: features3 0x1<LAHF>
cpu0: xsave features 0x3<x87,SSE>
cpu0: xsave area size: current 576, maximum 576, xgetbv enabled
cpu0: enabled xsave 0x3<x87,SSE>
cpu0: I-cache 32KB 64B/line 8-way, D-cache 32KB 64B/line 8-way
cpu0: L2 cache 3MB 64B/line 12-way
cpu0: 64B prefetching
cpu0: ITLB 128 4KB entries 4-way, 8 2M/4 4M entries
cpu0: DTLB 256 4KB entries 4-way, 16 4MB entries 4-way
cpu0: Initial APIC ID 0
cpu0: Cluster/Package ID 0
cpu0: Core ID 0
cpu0: DSPM-eax 0x3<DTS,IDA>
cpu0: DSPM-ecx 0x3<HWF>
cpu0: SEF highest subleaf 00000000
cpu0: microcode version 0xa0c, platform ID 7

Desktop which doesn't:

cruncherroot(cruncher)root$ cpuctl identify 0
cpu0: highest basic info 0000000d
cpu0: highest extended info 80000008
cpu0: "Intel(R) Core(TM) i5-2320 CPU @ 3.00GHz"
cpu0: Intel Xeon E3-12xx, 2nd gen i7, i5, i3 2xxx (686-class), 2993.40 MHz
cpu0: family 0x6 model 0x2a stepping 0x7 (id 0x206a7)
cpu0: features 
0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE>
cpu0: features 0xbfebfbff<MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2>
cpu0: features 0xbfebfbff<SS,HTT,TM,SBF>
cpu0: features1 0x1f9ae3bf<SSE3,PCLMULQDQ,DTES64,MONITOR,DS-CPL,VMX,EST,TM2>
cpu0: features1 0x1f9ae3bf<SSSE3,CX16,xTPR,PDCM,PCID,SSE41,SSE42,POPCNT>
cpu0: features1 0x1f9ae3bf<DEADLINE,AES,XSAVE,OSXSAVE,AVX>
cpu0: features2 0x28100800<SYSCALL/SYSRET,XD,RDTSCP,EM64T>
cpu0: features3 0x1<LAHF>
cpu0: xsave features 0x7<x87,SSE,AVX>
cpu0: xsave instructions 0x1<XSAVEOPT>
cpu0: xsave area size: current 832, maximum 832, xgetbv enabled
cpu0: enabled xsave 0x7<x87,SSE,AVX>
cpu0: I-cache 32KB 64B/line 8-way, D-cache 32KB 64B/line 8-way
cpu0: L2 cache 256KB 64B/line 8-way
cpu0: L3 cache 6MB 64B/line 12-way
cpu0: 64B prefetching
cpu0: ITLB 128 4KB entries 4-way, 2M/4M: 8 entries
cpu0: DTLB 64 4KB entries 4-way, 2M/4M: 32 entries (L0)
cpu0: L2 STLB 512 4KB entries 4-way
cpu0: Initial APIC ID 0
cpu0: Cluster/Package ID 0
cpu0: Core ID 0
cpu0: SMT ID 0
cpu0: DSPM-eax 0x77<DTS,IDA,ARAT,PLN,ECMD,PTM>
cpu0: DSPM-ecx 0x9<HWF,EPB>
cpu0: SEF highest subleaf 00000000
cpu0: microcode version 0x23, platform ID 1

Dave