The crash happens here:
0: c5 f8 ae 5d a0 vstmxcsr -0x60(%rbp) 5: 8b 45 a0 mov -0x60(%rbp),%eax 8: 81 e0 c0 ff 00 00 and $0xffc0,%eax e: 3b 05 06 6c f2 1d cmp 0x1df26c06(%rip),%eax # 0x1df26c1a 14: 0f 84 08 00 00 00 je 0x22 1a: c5 f8 ae 15 f8 6b f2 vldmxcsr 0x1df26bf8(%rip) # 0x1df26c1a It's probably the first VEX-encoded instruction that is being executed. > CPU:total 1 (initial active 1) (1 cores per cpu, 1 threads per core) family 6 > model 85 stepping 4, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1, > sse4.2, popcnt, aes, clmul, 3dnowpref, tsc, tscinvbit > CPU Model and flags from /proc/cpuinfo: > model name : Intel(R) Xeon(R) Silver 4110 CPU @ 2.10GHz > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr > pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm > constant_tsc arch_perfmon pebs bts nopl tsc_reliable nonstop_tsc cpuid pni > pclmulqdq ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes hypervisor lahf_lm > 3dnowprefetch pti arat This is obviously not a real CPU (not even with virtualization), it's a very unusual combination of flags. I believe this commit changeset: 52471:643e5a73d48a user: vdeshpande date: Mon Nov 04 10:12:23 2019 +0100 summary: 8221092: UseAVX=3 has performance degredation on Skylake (X7) processors unconditionally enables AVX2 for Skylake CPUs, independent of actual CPU capabilities. You can likely work around this with -XX:UseAVX=0.
