RFR: JDK-8291878: NMT: Malloc limits [v2]

[Thomas Stuefe]

On Tue, 23 Aug 2022 16:19:35 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Thomas Stuefe has updated the pull request incrementally with four additional commits since the last revision:
>> 
>>  - Update test/hotspot/jtreg/runtime/NMT/MallocLimitTest.java
>>    
>>    Co-authored-by: Aleksey Shipilëv <shade at redhat.com>
>>  - Update src/hotspot/share/runtime/globals.hpp
>>    
>>    Co-authored-by: Aleksey Shipilëv <shade at redhat.com>
>>  - Update src/hotspot/share/runtime/arguments.cpp
>>    
>>    Co-authored-by: Aleksey Shipilëv <shade at redhat.com>
>>  - Update src/hotspot/share/runtime/arguments.cpp
>>    
>>    Co-authored-by: Aleksey Shipilëv <shade at redhat.com>
>
> src/hotspot/share/services/mallocTracker.cpp line 105:
> 
>> 103: 
>> 104:   if (_total_limit > 0) {
>> 105:     log_info(nmt)("MallocLimit: total limit: " SIZE_FORMAT, _total_limit);
> 
> We have a few useful utilities for printing byte sizes, see `byte_size_in_proper_unit` and friends. I assume limits are expected to be in integer megabytes, so this might print something very large.

I did not know we have this. This is nice.

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PR: https://git.openjdk.org/jdk/pull/9891