Re: RFR: 8281712: [REDO] AArch64: Implement string_compare intrinsic in SVE
On Tue, 17 May 2022 08:37:52 GMT, Nick Gasson wrote: > LGTM! Thank you, Nick! - PR: https://git.openjdk.java.net/jdk/pull/8723
Re: RFR: 8281712: [REDO] AArch64: Implement string_compare intrinsic in SVE
On Mon, 16 May 2022 07:21:27 GMT, Ningsheng Jian wrote: > This is the REDO of JDK-8269559 and JDK-8275448. Those two backouts finally > turned to be some system zlib issue in AArch64 macOS, and is not related to > the patch itself. See [1][2] for details. > > This patch is generally the same as JDK-8275448, which uses SVE to optimize > string_compare intrinsics for long string comparisons. I did a rebase with > small tweaks to get better performance on recent Neoverse hardware. Test data > on systems with different SVE vector sizes: > > >casedelta size 128-bits 256-bits 512-bits > compareToLL 2 24 0.17% 0.58% 0.00% > compareToLL 2 36 0.00%2.25% 0.04% > compareToLL 2 72 -4.40% 3.87% -12.82% > compareToLL 2 1284.55%58.31% 13.53% > compareToLL 2 25619.39% 69.77% 82.03% > compareToLL 2 5121.81%68.38% 170.93% > compareToLU 2 24 25.57% 46.98% 54.61% > compareToLU 2 36 36.03% 70.26% 94.33% > compareToLU 2 72 35.86% 90.58% 146.04% > compareToLU 2 12870.82% 119.19%266.22% > compareToLU 2 25680.77% 146.33%420.01% > compareToLU 2 51294.62% 171.72%530.87% > compareToUL 2 24 20.82% 34.48% 62.14% > compareToUL 2 36 39.77% 60.79% 69.77% > compareToUL 2 72 35.46% 84.34% 121.90% > compareToUL 2 12867.77% 110.97%220.53% > compareToUL 2 25677.05% 160.29%331.30% > compareToUL 2 51291.88% 184.57%524.21% > compareToUU 2 24 -0.13% 0.40% 0.00% > compareToUU 2 36 -9.18% 12.84% -13.93% > compareToUU 2 72 1.67%60.61% 6.69% > compareToUU 2 12813.51% 60.33% 55.27% > compareToUU 2 2562.55%62.17% 153.26% > compareToUU 2 5124.12%68.62% 201.68% > > JTreg tests passed on SVE hardware. > > [1] https://bugs.openjdk.java.net/browse/JDK-8275448 > [2] https://bugs.openjdk.java.net/browse/JDK-8282954 LGTM! - Marked as reviewed by ngasson (Reviewer). PR: https://git.openjdk.java.net/jdk/pull/8723
Re: RFR: 8281712: [REDO] AArch64: Implement string_compare intrinsic in SVE
On Tue, 17 May 2022 06:09:11 GMT, Tobias Hartmann wrote: > Sure, I already submitted testing yesterday, it all passed. Thank you, Tobias! - PR: https://git.openjdk.java.net/jdk/pull/8723
Re: RFR: 8281712: [REDO] AArch64: Implement string_compare intrinsic in SVE
On Mon, 16 May 2022 07:21:27 GMT, Ningsheng Jian wrote: > This is the REDO of JDK-8269559 and JDK-8275448. Those two backouts finally > turned to be some system zlib issue in AArch64 macOS, and is not related to > the patch itself. See [1][2] for details. > > This patch is generally the same as JDK-8275448, which uses SVE to optimize > string_compare intrinsics for long string comparisons. I did a rebase with > small tweaks to get better performance on recent Neoverse hardware. Test data > on systems with different SVE vector sizes: > > >casedelta size 128-bits 256-bits 512-bits > compareToLL 2 24 0.17% 0.58% 0.00% > compareToLL 2 36 0.00%2.25% 0.04% > compareToLL 2 72 -4.40% 3.87% -12.82% > compareToLL 2 1284.55%58.31% 13.53% > compareToLL 2 25619.39% 69.77% 82.03% > compareToLL 2 5121.81%68.38% 170.93% > compareToLU 2 24 25.57% 46.98% 54.61% > compareToLU 2 36 36.03% 70.26% 94.33% > compareToLU 2 72 35.86% 90.58% 146.04% > compareToLU 2 12870.82% 119.19%266.22% > compareToLU 2 25680.77% 146.33%420.01% > compareToLU 2 51294.62% 171.72%530.87% > compareToUL 2 24 20.82% 34.48% 62.14% > compareToUL 2 36 39.77% 60.79% 69.77% > compareToUL 2 72 35.46% 84.34% 121.90% > compareToUL 2 12867.77% 110.97%220.53% > compareToUL 2 25677.05% 160.29%331.30% > compareToUL 2 51291.88% 184.57%524.21% > compareToUU 2 24 -0.13% 0.40% 0.00% > compareToUU 2 36 -9.18% 12.84% -13.93% > compareToUU 2 72 1.67%60.61% 6.69% > compareToUU 2 12813.51% 60.33% 55.27% > compareToUU 2 2562.55%62.17% 153.26% > compareToUU 2 5124.12%68.62% 201.68% > > JTreg tests passed on SVE hardware. > > [1] https://bugs.openjdk.java.net/browse/JDK-8275448 > [2] https://bugs.openjdk.java.net/browse/JDK-8282954 Marked as reviewed by thartmann (Reviewer). Sure, I already submitted testing yesterday, it all passed. - PR: https://git.openjdk.java.net/jdk/pull/8723
Re: RFR: 8281712: [REDO] AArch64: Implement string_compare intrinsic in SVE
On Mon, 16 May 2022 07:21:27 GMT, Ningsheng Jian wrote: > This is the REDO of JDK-8269559 and JDK-8275448. Those two backouts finally > turned to be some system zlib issue in AArch64 macOS, and is not related to > the patch itself. See [1][2] for details. > > This patch is generally the same as JDK-8275448, which uses SVE to optimize > string_compare intrinsics for long string comparisons. I did a rebase with > small tweaks to get better performance on recent Neoverse hardware. Test data > on systems with different SVE vector sizes: > > >casedelta size 128-bits 256-bits 512-bits > compareToLL 2 24 0.17% 0.58% 0.00% > compareToLL 2 36 0.00%2.25% 0.04% > compareToLL 2 72 -4.40% 3.87% -12.82% > compareToLL 2 1284.55%58.31% 13.53% > compareToLL 2 25619.39% 69.77% 82.03% > compareToLL 2 5121.81%68.38% 170.93% > compareToLU 2 24 25.57% 46.98% 54.61% > compareToLU 2 36 36.03% 70.26% 94.33% > compareToLU 2 72 35.86% 90.58% 146.04% > compareToLU 2 12870.82% 119.19%266.22% > compareToLU 2 25680.77% 146.33%420.01% > compareToLU 2 51294.62% 171.72%530.87% > compareToUL 2 24 20.82% 34.48% 62.14% > compareToUL 2 36 39.77% 60.79% 69.77% > compareToUL 2 72 35.46% 84.34% 121.90% > compareToUL 2 12867.77% 110.97%220.53% > compareToUL 2 25677.05% 160.29%331.30% > compareToUL 2 51291.88% 184.57%524.21% > compareToUU 2 24 -0.13% 0.40% 0.00% > compareToUU 2 36 -9.18% 12.84% -13.93% > compareToUU 2 72 1.67%60.61% 6.69% > compareToUU 2 12813.51% 60.33% 55.27% > compareToUU 2 2562.55%62.17% 153.26% > compareToUU 2 5124.12%68.62% 201.68% > > JTreg tests passed on SVE hardware. > > [1] https://bugs.openjdk.java.net/browse/JDK-8275448 > [2] https://bugs.openjdk.java.net/browse/JDK-8282954 @TobiHartmann Could you please help to test this patch in Oracle test system? Thanks! - PR: https://git.openjdk.java.net/jdk/pull/8723
