From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org
Subject: [Qemu-devel] [PATCH 0/3] target/arm: Reduce tlb_flush overhead
Date: Thu, 18 Oct 2018 11:27:55 -0700 [thread overview]
Message-ID: <20181018182758.18646-1-richard.henderson@linaro.org> (raw)
While installing AArch64 Ubuntu into a new vm,
I happened to notice that tlb_flush+memset was
consuming 25% of the total runtime.
This patch set reduces that overhead to 10%.
Full tlb flushes are down to 11k from 1.8M,
when pausing the installation at the first menu.
r~
Richard Henderson (3):
target/arm: Remove writefn from TTBR0_EL3
target/arm: Only flush tlb if ASID changes
target/arm: Flush only the TLBs affected by TTBR*_EL1
target/arm/helper.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
--
2.17.2
next reply other threads:[~2018-10-18 18:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-18 18:27 Richard Henderson [this message]
2018-10-18 18:27 ` [Qemu-devel] [PATCH 1/3] target/arm: Remove writefn from TTBR0_EL3 Richard Henderson
2018-10-18 20:28 ` Aaron Lindsay
2018-10-18 18:27 ` [Qemu-devel] [PATCH 2/3] target/arm: Only flush tlb if ASID changes Richard Henderson
2018-10-18 20:28 ` Aaron Lindsay
2018-10-18 18:27 ` [Qemu-devel] [PATCH 3/3] target/arm: Flush only the TLBs affected by TTBR*_EL1 Richard Henderson
2018-10-18 20:27 ` Aaron Lindsay
2018-10-18 20:52 ` Richard Henderson
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