On Tue, 14 Dec 2021 16:24:10 GMT, Coleen Phillimore <[email protected]> wrote:
>> src/hotspot/os/linux/os_perf_linux.cpp line 929:
>>
>>> 927: bool CPUInformationInterface::initialize() {
>>> 928: _cpu_info = new CPUInformation();
>>> 929: VM_Version::initialize_cpu_information();
>>
>> I can't figure out when this code will actually get executed in relation to
>> the VM initialization process and VM_Version's initialization. Can this
>> actually execute before that happens? Or could we assert that it has
>> happened?
>
> VM_Version::initialize() is called very early in Threads::create_vm. This
> latter VM_Version::initialize_cpu_information is called later when JFR event
> is emitted. The reason it was "_ext" was because it is part of JFR only. It
> seems that we might be able to consolidate this more later now that it's
> moved together.
> I don't think adding an assert would be meaningful here.
I did add a simple initialization assert in the x86 code where it might be
interesting and reran the JFR tests.
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PR: https://git.openjdk.java.net/jdk/pull/6820
