From: Mark Hairgrove <mhairgrove@nvidia.com>
To: <linuxppc-dev@lists.ozlabs.org>
Cc: Alistair Popple <alistair@popple.id.au>,
Mark Hairgrove <mhairgrove@nvidia.com>,
Reza Arbab <arbab@us.ibm.com>
Subject: [PATCH 0/3] powerpc/powernv/npu: Improve ATSD invalidation overhead
Date: Thu, 27 Sep 2018 16:23:08 -0700 [thread overview]
Message-ID: <1538090591-28519-1-git-send-email-mhairgrove@nvidia.com> (raw)
When ATS is used in a process, all CPU TLB invalidates in that process
also trigger ATSD invalidates via mmu_notifiers. This additional overhead
is noticeable in applications which do heavy memory allocation or page
migration among nodes, particularly to and from GPUs.
This patch set reduces that overhead by rearranging how the ATSDs are
issued and by using size-based ATSD invalidates.
Mark Hairgrove (3):
powerpc/powernv/npu: Reduce eieio usage when issuing ATSD invalidates
powerpc/powernv/npu: Use size-based ATSD invalidates
powerpc/powernv/npu: Remove atsd_threshold debugfs setting
arch/powerpc/platforms/powernv/npu-dma.c | 177 ++++++++++++++---------------
1 files changed, 85 insertions(+), 92 deletions(-)
--
1.7.2.5
next reply other threads:[~2018-09-27 23:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-27 23:23 Mark Hairgrove [this message]
2018-09-27 23:23 ` [PATCH 1/3] powerpc/powernv/npu: Reduce eieio usage when issuing ATSD invalidates Mark Hairgrove
2018-10-02 7:23 ` Alistair Popple
2018-09-27 23:23 ` [PATCH 2/3] powerpc/powernv/npu: Use size-based " Mark Hairgrove
2018-10-02 7:11 ` Alistair Popple
2018-10-03 1:10 ` Mark Hairgrove
2018-10-03 2:27 ` Alistair Popple
2018-10-03 18:33 ` Mark Hairgrove
2018-09-27 23:23 ` [PATCH 3/3] powerpc/powernv/npu: Remove atsd_threshold debugfs setting Mark Hairgrove
2018-10-02 7:12 ` Alistair Popple
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