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[Qemu-devel] [PULL 22/26] target/aarch64: optimize indirect branches
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From: |
Richard Henderson |
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Subject: |
[Qemu-devel] [PULL 22/26] target/aarch64: optimize indirect branches |
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Date: |
Mon, 5 Jun 2017 09:52:29 -0700 |
From: "Emilio G. Cota" <address@hidden>
Measurements:
[Baseline performance is that before applying this and the previous commit]
- NBench, aarch64-softmmu. Host: Intel
i7-4790K @ 4.00GHz
1.7x
+-+--------------------------------------------------------------------------------------------------------------+-+
|
|
| cross
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1.6x
+cross+jr.................................................####...................................................+-+
| #++#
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| # #
|
1.5x
+-+...................................................*****..#...................................................+-+
| *+++* #
|
| * * #
|
1.4x
+-+...................................................*...*..#...................................................+-+
| * * #
|
| ##### * * #
|
1.3x
+-+................................****+++#...........*...*..#...................................................+-+
| *++* # * * #
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| * * # * * #
|
1.2x
+-+................................*..*...#...........*...*..#...................................................+-+
| * * # * * #
|
| #### * * # * * #
|
1.1x
+-+.......................+++#..#..*..*...#...........*...*..#...................................................+-+
| **** # * * # * * #
****#### |
| * * # * * # * * # ****###
+++#### ****### * * # |
1x
+-++-++++++-++++****###++-*++*++#++*++*+-+#++****+++++*+++*++#++*++*-+#++*****++#++****###-++*++*-+#++*+-*+++#+-++-+
| *****### * * # * * # * * # *++*### * * # * * #
* * # * *++# * * # * * # |
| * *++# * * # * * # * * # * * # * * # * * #
* * # * * # * * # * * # |
0.9x
+-+---*****###--****###---****###--****####--****###--*****###--****###--*****###--****###---****###--****####---+-+
ASSIGNMENT BITFIELD FOURFP EMULATION HUFFMAN LU DECOMPOSITIONNEURAL
NUMERIC SORSTRING SORT hmean
png: http://imgur.com/qO9ubtk
NB. cross here represents the previous commit.
- SPECint06 (test set), aarch64-linux-user. Host:
Intel i7-4790K @ 4.00GHz
1.5x
+-+--------------------------------------------------------------------------------------------------------------+-+
|
***** |
|
*+++* jr |
| *
* |
1.4x
+-+.....................................................................*...*.....................+++............+-+
| *
* | |
| ***** *
* | |
| * * *
* ***** |
1.3x
+-+....................................*...*............................*...*....................*.|.*...........+-+
| +++ * * *
* * | * |
| ***** * * *
* *+++* |
| * * * * *
* * * |
1.2x
+-+....................*...*...........*...*............................*...*...........*****....*...*...........+-+
| ***** * * * * *
* * * * * +++ |
| * * * * * * *
* * * * * ***** |
| * * * * ***** * * *
* * * * * * * |
1.1x
+-+...*...*............*...*...*...*...*...*............................*...*....+++....*...*....*...*...*...*...+-+
| * * * * * * * * *
* ***** * * * * * * |
| * * * * * * * * ***** *
* * * * * * * * * |
| * * ***** * * * * * * * * ****** *
* * * * * * * * * |
1x
+-++-+*+++*-++*+++*++++*+-+*+++*-++*+++*-++*+++*+++*++-*++++*-++*****+++*++-*+++*++-*+++*+-+*++++*+++*++-*+++*+-++-+
| * * * * * * * * * * * * * * *+++* *
* * * * * * * * * |
| * * * * * * * * * * * * * * * * *
* * * * * * * * * |
| * * * * * * * * * * * * * * * * *
* * * * * * * * * |
0.9x
+-+---*****---*****----*****---*****---*****---*****---******---*****---*****---*****---*****----*****---*****---+-+
astar bzip2 gcc gobmk h264ref hmmlibquantum mcf
omnetpperlbench sjengxalancbmk hmean
png: http://imgur.com/3Dp4vvq
- SPECint06 (train set), aarch64-linux-user. Host:
Intel i7-4790K @ 4.00GHz
1.7x
+-+--------------------------------------------------------------------------------------------------------------+-+
|
|
|
jr |
1.6x
+-+...............................................................................................+++............+-+
|
***** |
|
*+++* |
|
* * |
1.5x
+-+..............................................................................................*...*...........+-+
|
+++ * * |
|
***** * * |
1.4x
+-+.....................................................................*+++*....................*...*...........+-+
| *
* * * |
| ***** *
* * * |
| * * *
* ***** * * |
1.3x
+-+....................................*...*............................*...*...*...*............*...*...........+-+
| +++ * * *
* * * * * |
| ***** * * *
* * * ***** * * |
1.2x
+-+....................*...*...........*...*............................*...*...*...*...*+++*....*...*...*****...+-+
| * * * * *
* * * * * * * *+++* |
| ***** * * ***** * * *
* * * * * * * * * |
| * * * * *+++* * * *
* * * * * * * * * |
1.1x
+-+...*...*............*...*...*...*...*...*............................*...*...*...*...*...*....*...*...*...*...+-+
| * * ***** * * * * * * ***** *
* * * * * * * * * |
| * * * * * * * * * * +++ ****** *+++* *
* * * * * * * * * |
1x
+-+---*****---*****----*****---*****---*****---*****---******---*****---*****---*****---*****----*****---*****---+-+
astar bzip2 gcc gobmk h264ref hmmlibquantum mcf
omnetpperlbench sjengxalancbmk hmean
png: http://imgur.com/vRrdc9j
Signed-off-by: Emilio G. Cota <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target/arm/translate-a64.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index ab61d96..860e279 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11367,8 +11367,7 @@ void gen_intermediate_code_a64(ARMCPU *cpu,
TranslationBlock *tb)
gen_a64_set_pc_im(dc->pc);
/* fall through */
case DISAS_JUMP:
- /* indicate that the hash table must be used to find the next TB */
- tcg_gen_exit_tb(0);
+ tcg_gen_lookup_and_goto_ptr(cpu_pc);
break;
case DISAS_TB_JUMP:
case DISAS_EXC:
--
2.9.4
- [Qemu-devel] [PULL 13/26] tcg/aarch64: Implement goto_ptr, (continued)
- [Qemu-devel] [PULL 13/26] tcg/aarch64: Implement goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 11/26] tb-hash: improve tb_jmp_cache hash function in user mode, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 15/26] tcg/s390: Implement goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 17/26] tcg/arm: Implement goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 20/26] target/hppa: Use tcg_gen_lookup_and_goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 21/26] target/aarch64: optimize cross-page direct jumps in softmmu, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 16/26] tcg/arm: Clarify tcg_out_bx for arm4 host, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 19/26] target/s390: Use tcg_gen_lookup_and_goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 23/26] target/mips: optimize cross-page direct jumps in softmmu, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 24/26] target/mips: optimize indirect branches, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 22/26] target/aarch64: optimize indirect branches,
Richard Henderson <=
- Re: [Qemu-devel] [PULL 22/26] target/aarch64: optimize indirect branches, Richard Henderson, 2017/06/07
- Re: [Qemu-devel] [PULL 22/26] target/aarch64: optimize indirect branches, Alex Bennée, 2017/06/08
[Qemu-devel] [PULL 25/26] target/alpha: Implement WTINT inline, Richard Henderson, 2017/06/05
[Qemu-devel] [PULL 26/26] target/alpha: Use goto_tb for fallthru between TBs, Richard Henderson, 2017/06/05