[GC] Add option G1BarrierSimple to use simple g1 post barrier #59
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mmyxym
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| if (G1BarrierSimple) { | ||
| for (; byte <= last_byte; byte++) { | ||
| *byte = G1CardTable::dirty_card_val(); | ||
| } |
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Why not use memset(), like what we did in dragonwell11?
linade
reviewed
Jun 14, 2024
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| __ load_byte_map_base(scratch); | ||
| __ add(start, start, scratch); | ||
| __ bind(L_loop); |
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assert(dirty_card_val == 0)
linade
reviewed
Jun 14, 2024
| __ mov64(tmp, disp); | ||
| __ addptr(addr, tmp); | ||
| __ bind(L_loop); | ||
| __ movb(Address(addr, count, Address::times_1), 0); |
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Use G1CardTable::dirty_card_val() like the rest of the code
linade
reviewed
Jun 14, 2024
| @@ -98,6 +100,36 @@ void G1BarrierSetAssembler::gen_write_ref_array_pre_barrier(MacroAssembler* masm | |||
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| void G1BarrierSetAssembler::gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators, | |||
| Register addr, Register count, Register tmp) { | |||
| #ifdef _LP64 | |||
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G1BarrierSimple seems to permit X86. What happens on that platform?
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The option will be ignored.
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Probably not enough functional tests which will concern our coverage goals.. |
Summary: Provide option G1BarrierSimple to use simple G1 post barrier for better mutator performance Testing: CI pipeline Reviewers: yude, yifeng Issue: dragonwell-project#56
linade
reviewed
Jun 17, 2024
| @@ -177,6 +177,25 @@ void G1Arguments::initialize() { | |||
| FLAG_SET_ERGO(ParallelGCThreads, 1); | |||
| } | |||
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| if (G1BarrierSimple) { | |||
| #if !defined(_LP64) || !(defined(X86) || defined(AARCH64)) | |||
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x86 32bit is not supported.
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ok, took me a while to see this means !(x86_64 || aarch64)
linade
approved these changes
Jun 18, 2024
leveretconey
approved these changes
Jun 18, 2024
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Summary: Provide option G1BarrierSimple to use simple G1 post barrier for better mutator performance
Testing: CI pipeline
Reviewers: yude, yifeng
Issue: #56