We have a problem with a system which ~seems~ to be pointing at a broken Write Combined Buffer implementation. Our chip seems to be getting garbage data instead of incomplete Write Combined Merging Transaction Layer Packets. We'll go ahead and put the beast on a PCIe Analyzer to verify this, but I thought I'd ask if anyone else had already stumbled across this. /proc/cpuinfo: processor : 0 vendor_id : CentaurHauls cpu family : 6 model : 15 model name : C-QuadCore C4600@2.0GHz stepping : 14 cpu MHz : 1332.000 cache size : 2048 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq monitor vmx est tm2 ssse3 cx16 xtpr pcid sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand rng rng_en ace ace_en ace2 phe phe_en pmm pmm_en lahf_lm abm 3dnowprefetch ida dtherm fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx xsaveopt bogomips : 3990.44 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 48 bits virtual power management: processor : 1 vendor_id : CentaurHauls cpu family : 6 model : 15 model name : C-QuadCore C4600@2.0GHz stepping : 14 cpu MHz : 1332.000 cache size : 2048 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq monitor vmx est tm2 ssse3 cx16 xtpr pcid sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand rng rng_en ace ace_en ace2 phe phe_en pmm pmm_en lahf_lm abm 3dnowprefetch ida dtherm fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx xsaveopt bogomips : 3990.44 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 48 bits virtual power management: processor : 2 vendor_id : CentaurHauls cpu family : 6 model : 15 model name : C-QuadCore C4600@2.0GHz stepping : 14 cpu MHz : 1332.000 cache size : 2048 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 1 apicid : 2 initial apicid : 2 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq monitor vmx est tm2 ssse3 cx16 xtpr pcid sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand rng rng_en ace ace_en ace2 phe phe_en pmm pmm_en lahf_lm abm 3dnowprefetch ida dtherm fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx xsaveopt bogomips : 3990.44 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 48 bits virtual power management: processor : 3 vendor_id : CentaurHauls cpu family : 6 model : 15 model name : C-QuadCore C4600@2.0GHz stepping : 14 cpu MHz : 1332.000 cache size : 2048 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 1 apicid : 3 initial apicid : 3 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq monitor vmx est tm2 ssse3 cx16 xtpr pcid sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand rng rng_en ace ace_en ace2 phe phe_en pmm pmm_en lahf_lm abm 3dnowprefetch ida dtherm fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx xsaveopt bogomips : 3990.44 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 48 bits virtual power management: Casey
