bring loong64 support #154
There are no files selected for viewing
File renamed without changes.
File renamed without changes.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| // Copyright 2022 Loongson Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| //go:build loong64 && !gccgo && !appengine | ||
| // +build loong64,!gccgo,!appengine | ||
|
|
||
| package lscq | ||
|
|
||
| import ( | ||
| "sync" | ||
| "unsafe" | ||
| ) | ||
|
|
||
| type uint128 struct { | ||
| data [2]uint64 | ||
| mu sync.Mutex | ||
| _ [128 - unsafe.Sizeof(sync.Mutex{})]byte | ||
| } | ||
|
|
||
| func compareAndSwapUint128(addr *uint128, old1, old2, new1, new2 uint64) (swapped bool) { | ||
| addr.mu.Lock() | ||
| defer addr.mu.Unlock() | ||
| if addr.data[0] == old1 && addr.data[1] == old2 { | ||
| addr.data[0] = new1 | ||
| addr.data[1] = new2 | ||
| return true | ||
| } else { | ||
| return false | ||
| } | ||
| } | ||
|
|
||
| func loadUint128(addr *uint128) (val uint128) { | ||
| addr.mu.Lock() | ||
| defer addr.mu.Unlock() | ||
| val = loadUint128Asm(addr) | ||
| return | ||
| } | ||
|
|
||
| func loadUint128Asm(addr *uint128) (val uint128) | ||
|
|
||
| func loadSCQNodePointer(addr unsafe.Pointer) (val scqNodePointer) | ||
|
|
||
| func loadSCQNodeUint64(addr unsafe.Pointer) (val scqNodeUint64) | ||
|
|
||
| func atomicTestAndSetFirstBit(addr *uint64) (val uint64) | ||
|
|
||
| func atomicTestAndSetSecondBit(addr *uint64) (val uint64) | ||
|
|
||
| func resetNode(addr unsafe.Pointer) | ||
|
|
||
| //go:nosplit | ||
| func compareAndSwapSCQNodePointer(addr *scqNodePointer, old, new scqNodePointer) (swapped bool) { | ||
| // Ref: src/runtime/atomic_pointer.go:sync_atomic_CompareAndSwapPointer | ||
| if runtimeEnableWriteBarrier() { | ||
| runtimeatomicwb(&addr.data, new.data) | ||
| } | ||
| return compareAndSwapUint128((*uint128)(runtimenoescape(unsafe.Pointer(addr))), old.flags, uint64(uintptr(old.data)), new.flags, uint64(uintptr(new.data))) | ||
| } | ||
|
|
||
| func compareAndSwapSCQNodeUint64(addr *scqNodeUint64, old, new scqNodeUint64) (swapped bool) { | ||
| return compareAndSwapUint128((*uint128)(unsafe.Pointer(addr)), old.flags, old.data, new.flags, new.data) | ||
| } | ||
|
|
||
| func runtimeEnableWriteBarrier() bool | ||
|
|
||
| //go:linkname runtimeatomicwb runtime.atomicwb | ||
| //go:noescape | ||
| func runtimeatomicwb(ptr *unsafe.Pointer, new unsafe.Pointer) | ||
|
|
||
| //go:linkname runtimenoescape runtime.noescape | ||
| func runtimenoescape(p unsafe.Pointer) unsafe.Pointer | ||
|
|
||
| //go:nosplit | ||
| func atomicWriteBarrier(ptr *unsafe.Pointer) { | ||
| // For SCQ dequeue only. (fastpath) | ||
| if runtimeEnableWriteBarrier() { | ||
| runtimeatomicwb(ptr, nil) | ||
| } | ||
| } | ||
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // Copyright 2022 Loongson Inc. | ||
|
|
||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| // +build loong64,!gccgo,!appengine | ||
|
|
||
| #include "textflag.h" | ||
|
|
||
| //func loadUint128(addr *uint128) (ret uint128) | ||
| TEXT ·loadUint128Asm(SB),NOSPLIT,$0-24 | ||
| MOVV addr+0(FP), R4 | ||
| DBAR | ||
| MOVV 0(R4), R5 | ||
| MOVV 8(R4), R6 | ||
| DBAR | ||
| MOVV R5, ret+8(FP) | ||
| MOVV R6, ret+16(FP) | ||
| DBAR | ||
| RET | ||
|
|
||
| // func loadSCQNodeUint64(addr unsafe.Pointer)(val scqNodeUint64) | ||
| TEXT ·loadSCQNodeUint64(SB),NOSPLIT,$0 | ||
| JMP ·loadUint128(SB) | ||
|
|
||
| // func loadSCQNodePointer(addr unsafe.Pointer)(val scqNodePointer) | ||
| TEXT ·loadSCQNodePointer(SB),NOSPLIT,$0 | ||
| JMP ·loadUint128(SB) | ||
|
|
||
| // func atomicTestAndSetFirstBit(addr *uint64)(val uint64) | ||
| TEXT ·atomicTestAndSetFirstBit(SB),NOSPLIT,$0 | ||
| MOVV addr+0(FP), R4 | ||
| MOVV $(1<<63), R6 | ||
| DBAR | ||
| testAndSetFirstBit_again: | ||
| LLV (R4), R5 | ||
| OR R6, R5, R5 | ||
| MOVV R5, R7 | ||
| SCV R5, (R4) | ||
| BEQ R5, testAndSetFirstBit_again | ||
| DBAR | ||
| MOVV R7, val+8(FP) | ||
| RET | ||
|
|
||
| // func atomicTestAndSetSecondBit(addr *uint64)(val uint64) | ||
| TEXT ·atomicTestAndSetSecondBit(SB),NOSPLIT,$0 | ||
| MOVV addr+0(FP), R4 | ||
| MOVV $(1<<62), R6 | ||
| DBAR | ||
| testAndSetSecBit_again: | ||
| LLV (R4), R5 | ||
| OR R6, R5, R5 | ||
| MOVV R5, R7 | ||
| SCV R5, (R4) | ||
| BEQ R5, testAndSetSecBit_again | ||
| DBAR | ||
| MOVV R7, val+8(FP) | ||
| RET | ||
|
|
||
| // func resetNode(addr unsafe.Pointer) | ||
| TEXT ·resetNode(SB),NOSPLIT,$0 | ||
| MOVV addr+0(FP), R4 | ||
| MOVV R0, 8(R4) | ||
| MOVV $(1<<62), R6 | ||
| DBAR | ||
| resetNode_again: | ||
| LLV (R4), R5 | ||
| OR R6, R5, R5 | ||
| SCV R5, (R4) | ||
| BEQ R5, resetNode_again | ||
| DBAR | ||
| RET | ||
|
|
||
| // func runtimeEnableWriteBarrier() bool | ||
| TEXT ·runtimeEnableWriteBarrier(SB),NOSPLIT,$0 | ||
| MOVW runtime·writeBarrier(SB), R0 | ||
| DBAR | ||
| MOVB R0, ret+0(FP) | ||
| RET | ||
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -131,6 +131,8 @@ type pointerSCQ struct { | |
| type scqNodePointer struct { | ||
| flags uint64 // isSafe 1-bit + isEmpty 1-bit + cycle 62-bit | ||
| data unsafe.Pointer | ||
| _ sync.Mutex // Only for architectures that do not support 128bit atomic operations | ||
|
There was a problem hiding this comment. 这里增加两个字段，把 scqNodePointer 的长度从 128 增加到了 256，会不会影响 cacheline 的利用进而影响性能？ @zhangyunhao116 There was a problem hiding this comment. Agree, added a comment below :) |
||
| _ [128 - unsafe.Sizeof(sync.Mutex{})]byte // The x86_64 instruction CMPXCHG16B requires 128bit alignment | ||
| } | ||
|
|
||
| func (q *pointerSCQ) Enqueue(data unsafe.Pointer) bool { | ||
|
|
||
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
要不改成这样"Copyright 2022 Loongson Inc. and ByteDance Inc."避免一下后续的法务风险？