From: Julien Grall <julien.grall@arm.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Cc: ard.biesheuvel@linaro.org, marc.zyngier@arm.com,
catalin.marinas@arm.com, will.deacon@arm.com,
Julien Grall <julien.grall@arm.com>,
Dave.Martin@arm.com
Subject: [PATCH v5 0/3] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state
Date: Tue, 21 May 2019 18:21:36 +0100 [thread overview]
Message-ID: <20190521172139.21277-1-julien.grall@arm.com> (raw)
Hi all,
This patch series keeps softirqs enabled while touching FPSIMD/SVE state.
For more details on the impact see patch #3.
This patch series has been benchmarked on Linux 5.1-rc4 with defconfig.
On Juno2:
* hackbench 100 process 1000 (10 times)
* .7% quicker
On ThunderX 2:
* hackbench 1000 process 1000 (20 times)
* 3.4% quicker
Note that while the benchmark has been done on 5.1-rc4, the patch series is
based on 5.2-rc1.
Cheers,
Julien Grall (3):
arm64/fpsimd: Remove the prototype for sve_flush_cpu_state()
arch/arm64: fpsimd: Introduce fpsimd_save_and_flush_cpu_state() and
use it
arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state
arch/arm64/include/asm/fpsimd.h | 5 +-
arch/arm64/include/asm/simd.h | 10 +--
arch/arm64/kernel/fpsimd.c | 139 +++++++++++++++++++++++++++-------------
arch/arm64/kvm/fpsimd.c | 4 +-
4 files changed, 103 insertions(+), 55 deletions(-)
--
2.11.0
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next reply other threads:[~2019-05-21 17:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-21 17:21 Julien Grall [this message]
2019-05-21 17:21 ` [PATCH v5 1/3] arm64/fpsimd: Remove the prototype for sve_flush_cpu_state() Julien Grall
2019-05-21 17:21 ` [PATCH v5 2/3] arch/arm64: fpsimd: Introduce fpsimd_save_and_flush_cpu_state() and use it Julien Grall
2019-06-04 11:12 ` Catalin Marinas
2019-06-04 11:52 ` Marc Zyngier
2019-05-21 17:21 ` [PATCH v5 3/3] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state Julien Grall
2019-06-03 16:25 ` Catalin Marinas
2019-06-03 21:21 ` Catalin Marinas
2019-06-04 10:35 ` Julien Grall
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