[jdk11u-dev] RFR: 8261302: NMT: Improve malloc site table hashing

[Goetz Lindenmaier]

On Thu, 21 Mar 2024 10:33:33 GMT, María Arias de Reyna <duke at openjdk.org> wrote:

>> @Delawen, @stuefe, can you please share the list of intended backports?
>
> Here is the short version list @GoeLin 
> 
> To JDK11:
> 
> The one with the opened PR with its follow-up:
> * JDK-8261302: NMT: Improve malloc site table hashing
> * JDK-8261520
> 
> Other related issues:
> * JDK-8261644: NMT: Simplifications and cleanups
> * JDK-8262165: NMT report should state how many callsites had been skipped
> * JDK-8256844: Make NMT late-initializable
> * JDK-8275320: NMT should perform buffer overrun checks
> * JDK-8277822: Remove debug-only heap overrun checks in os::malloc and friends
> * JDK-8281015: Further simplify NMT backend
> * JDK-8292072: repurpose Tracking overhead counter as global malloc counter
> * JDK-8297958: Display peak values
> * JDK-8317772: Make peak values available in release builds
> 
> TO JDK17 and below:
> * JDK-8280583 (fixed in 19): Always build NMT
> * JDK-8281023 (fixed in 19): NMT integration into pp debug command does not work
> * JDK-8281460 (fixed in 19): Let ObjectMonitor have its own NMT category
> * JDK-8289182 (fixed in 20): MemTracker::baseline should return void
> * JDK-8289633 (fixed in 20): Forbid raw C-heap allocation functions in hotspot and fix findings hotspot integrated
> * JDK-8290868 (fixed in 20): MallocSiteTable statistics improvements
> * JDK-8290870 (fixed in 20): Increase MallocSiteTable size and allocate it only when needed
> * JDK-8291878 (fixed in 20): Diagnostic malloc limits
> * JDK-8292071 (fixed in 20): move MallocHeader to its own header and inline header checks
> * JDK-8292073 (fixed in 20): remove unused constructor parameter from MallocHeader
> * JDK-8293313: (fixed in 21): Add "Fake OOM" mode to MallocLimit
> * JDK-8302820 (fixed in 21): Remove costs for NMTPreInit when NMT is off
> * JDK-8292561 (fixed in 20): Make "ReplayCompiles" a diagnostic product switch
> * JDK-8319437 (fixed in 22, to check JDK21): should show library names in call stacks
> * JDK-8320061 (fixed in 22, to check JDK21): Multiple issues with peak accounting
> 
> Maybe I should start with the ones associated with JDK17?

Hi @Delawen, could you please edit the comment and add links to the bugIDs?
You should start with 21.

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PR Comment: https://git.openjdk.org/jdk11u-dev/pull/2608#issuecomment-2014594544