Messages in this thread | | | From | Julien Grall <> | Subject | [PATCH v2 0/3] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state | Date | Fri, 12 Apr 2019 18:14:17 +0100 |
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Hi all,
This patch series keep 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 kvm-arm/next as it has few conflicts with the SVE KVM series.
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 | 6 +- arch/arm64/include/asm/simd.h | 4 +- arch/arm64/kernel/fpsimd.c | 148 +++++++++++++++++++++++++++++----------- arch/arm64/kvm/fpsimd.c | 3 +- 4 files changed, 112 insertions(+), 49 deletions(-)
-- 2.11.0
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