Fatal error when running with +UseZGC

[Mohammad Dashti]

Hi Nils,
Here's the information:

intx MaxVectorSize                            = 16
          {C2 product} {default}

CPU:total 4 (initial active 4) (4 cores per cpu, 1 threads per core) family
21 model 101 stepping 1, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3,
sse4.1, sse4.2, popcnt, avx, avx2, aes, clmul, mmxext, 3dnowpref, lzcnt,
sse4a, tsc, tscinvbit, tscinv, bmi1, bmi2, fma
CPU Model and flags from /proc/cpuinfo:
model name      : AMD A10-9600P RADEON R5, 10 COMPUTE CORES 4C+6G
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm constant_tsc rep_good acc_power nopl nonstop_tsc cpuid
extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2
movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic
cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp
fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb bpext ptsc mwaitx
cpb hw_pstate vmmcall fsgsbase bmi1 avx2 smep bmi2 xsaveopt arat npt lbrv
svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists
pausefilter pfthreshold avic overflow_recov

Thanks,
Mohammad


On Thu, Mar 8, 2018 at 7:47 AM, Nils Eliasson <nils.eliasson at oracle.com>
wrote:

> Hi Mohammad,
>
> If you start the JVM with -XX:+PrintFlagsFinal, what value does the flag
> MaxVectorSize get?
>
> Also, you got a hs_err_pid*.log file from the crash. At the end there is a
> section with CPU information. It looks something like:
>
> "CPU:total 4 (initial active 4) (2 cores per cpu, 2 threads per core)
> family 6 model 61 stepping 4, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3,
> sse4.1, sse4.2, popcnt, ...
> CPU Model and flags from /proc/cpuinfo:
> model name      : Intel(R) Core(TM) i5-5300U CPU @ 2.30GHz
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
> pdpe1gb rdtscp lm ..."
>
> Can you please provide that information too?
>
> Regards,
>
> Nils
>
>
>
> On 2018-03-08 15:30, Mohammad Dashti wrote:
>
>> When running with a release/fastdebug/slowdebug build, I get a fatal error
>> only with ZGC. I get this error when running on an AMD machine, I tried
>> the
>> same build on an Intel box and it runs without problems. Here are the
>> relevant details (I simply run "java -XX:+UseZGC -version"):
>>
>> Host: A10-9600P, AMD A10-9600P RADEON R5, 10 COMPUTE CORES 4C+6G, 4 cores,
>> 11G, Ubuntu 16.04.3 LTS
>>
>> # A fatal error has been detected by the Java Runtime Environment:
>> #
>> #  Internal Error (zgc/src/hotspot/share/opto/machnode.cpp:580),
>> pid=25940,
>> tid=25952
>> #  assert((uint)_ideal_reg < (uint)_last_machine_leaf &&
>> Type::mreg2type[_ideal_reg]) failed: in bounds
>>
>> And here's the call stack:
>>
>> Current thread (0x00007f23401967c0):  JavaThread "C2 CompilerThread0"
>> daemon [_thread_in_native, id=25952,
>> stack(0x00007f2322d33000,0x00007f2322e34000)]
>>
>>
>> Current CompileTask:
>> C2:    280   27       4       java.lang.String::charAt (25 bytes)
>> 0x00007f2323604738 - 0x00007f2323604751
>>
>> Stack: [0x00007f2322d33000,0x00007f2322e34000],  sp=0x00007f2322e2eac0,
>> free space=1006k
>> Native frames: (J=compiled Java code, A=aot compiled Java code,
>> j=interpreted, Vv=VM code, C=native code)
>> V  [libjvm.so+0x15968ae]  VMError::report_and_die(int, char const*, char
>> const*, __va_list_tag*, Thread*, unsigned char*, void*, void*, char
>> const*,
>> int, unsigned long)+0x4ce
>> V  [libjvm.so+0x159741f]  VMError::report_and_die(Thread*, char const*,
>> int, char const*, char const*, __va_list_tag*)+0x2f
>> V  [libjvm.so+0xaa53e2]  report_vm_error(char const*, int, char const*,
>> char const*, ...)+0x112
>> V  [libjvm.so+0x107b00a]  MachProjNode::bottom_type() const+0x12a
>> V  [libjvm.so+0x89c872]  PhaseChaitin::gather_lrg_masks(bool)+0x192
>> V  [libjvm.so+0xce2c2b]  PhaseCFG::global_code_motion()+0x11eb
>> V  [libjvm.so+0xce2ee1]  PhaseCFG::do_global_code_motion()+0x51
>> V  [libjvm.so+0xa0177a]  Compile::Code_Gen()+0x2ca
>> V  [libjvm.so+0xa0fbb0]  Compile::Compile(ciEnv*, C2Compiler*, ciMethod*,
>> int, bool, bool, bool, DirectiveSet*)+0x1450
>> V  [libjvm.so+0x854e4b]  C2Compiler::compile_method(ciEnv*, ciMethod*,
>> int,
>> DirectiveSet*)+0x2db
>> V  [libjvm.so+0xa1bf36]
>> CompileBroker::invoke_compiler_on_method(CompileTask*)+0x7d6
>> V  [libjvm.so+0xa1db98]  CompileBroker::compiler_thread_loop()+0x408
>> V  [libjvm.so+0x14f6825]  JavaThread::thread_main_inner()+0x1e5
>> V  [libjvm.so+0x14f6ab8]  JavaThread::run()+0x208
>> V  [libjvm.so+0x1261102]  thread_native_entry(Thread*)+0x112
>>
>> I believe this issue is similar to a previous message:
>> http://mail.openjdk.java.net/pipermail/zgc-dev/2018-March/000169.html
>>
>> Thanks,
>> Mohammad
>>
>
>