Fixes for bit_cast on 32bit systems

[hkaiser]

Fixes #6426
Fixes #6557

[StellarBot]

Performance test report

HPX Performance

Comparison

BENCHMARK	FORK_JOIN_EXECUTOR	PARALLEL_EXECUTOR	SCHEDULER_EXECUTOR
For Each	--	--	--

Info

Property	Before	After
HPX Commit	d27ac2e	1a25e31
HPX Datetime	2024-03-18T14:00:30+00:00	2024-11-03T19:51:00+00:00
Clustername	rostam	rostam
Datetime	2024-03-18T09:18:04.949759-05:00	2024-11-03T16:04:54.388373-06:00
Compiler	/opt/apps/llvm/13.0.1/bin/clang++ 13.0.1	/opt/apps/llvm/18.1.5/bin/clang++ 18.1.5
Envfile
Hostname	medusa08.rostam.cct.lsu.edu	medusa08.rostam.cct.lsu.edu

Comparison

BENCHMARK	NO-EXECUTOR
Future Overhead - Create Thread Hierarchical - Latch	--

Info

Property	Before	After
HPX Commit	d27ac2e	1a25e31
HPX Datetime	2024-03-18T14:00:30+00:00	2024-11-03T19:51:00+00:00
Clustername	rostam	rostam
Datetime	2024-03-18T09:19:53.062988-05:00	2024-11-03T16:06:44.344844-06:00
Compiler	/opt/apps/llvm/13.0.1/bin/clang++ 13.0.1	/opt/apps/llvm/18.1.5/bin/clang++ 18.1.5
Envfile
Hostname	medusa08.rostam.cct.lsu.edu	medusa08.rostam.cct.lsu.edu

Comparison

BENCHMARK	FORK_JOIN_EXECUTOR_DEFAULT_FORK_JOIN_POLICY_ALLOCATOR	PARALLEL_EXECUTOR_DEFAULT_PARALLEL_POLICY_ALLOCATOR	SCHEDULER_EXECUTOR_DEFAULT_SCHEDULER_EXECUTOR_ALLOCATOR
Stream Benchmark - Add	--	--	--
Stream Benchmark - Scale	--	-	---
Stream Benchmark - Triad	--	--	--
Stream Benchmark - Copy	--	--	---

Info

Property	Before	After
HPX Commit	d27ac2e	1a25e31
HPX Datetime	2024-03-18T14:00:30+00:00	2024-11-03T19:51:00+00:00
Clustername	rostam	rostam
Datetime	2024-03-18T09:20:13.002391-05:00	2024-11-03T16:07:07.068384-06:00
Compiler	/opt/apps/llvm/13.0.1/bin/clang++ 13.0.1	/opt/apps/llvm/18.1.5/bin/clang++ 18.1.5
Envfile
Hostname	medusa08.rostam.cct.lsu.edu	medusa08.rostam.cct.lsu.edu

Explanation of Symbols

Symbol	MEANING
=	No performance change (confidence interval within ±1%)
(=)	Probably no performance change (confidence interval within ±2%)
(+)/(-)	Very small performance improvement/degradation (≤1%)
+/-	Small performance improvement/degradation (≤5%)
++/--	Large performance improvement/degradation (≤10%)
+++/---	Very large performance improvement/degradation (>10%)
?	Probably no change, but quite large uncertainty (confidence interval with ±5%)
??	Unclear result, very large uncertainty (±10%)
???	Something unexpected…