From: Yury Norov <yury.norov@gmail.com>
To: Alexander Potapenko <glider@google.com>
Cc: catalin.marinas@arm.com, will@kernel.org, pcc@google.com,
andreyknvl@gmail.com, andriy.shevchenko@linux.intel.com,
aleksander.lobakin@intel.com, linux@rasmusvillemoes.dk,
alexandru.elisei@arm.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, eugenis@google.com,
syednwaris@gmail.com, william.gray@linaro.org
Subject: Re: [PATCH v10-mte 7/7] arm64: mte: implement CONFIG_ARM64_MTE_SWAP_STATS
Date: Thu, 14 Dec 2023 12:21:33 -0800 [thread overview]
Message-ID: <ZXtjzQmnOz+GGPGW@yury-ThinkPad> (raw)
In-Reply-To: <20231214110639.2294687-8-glider@google.com>
On Thu, Dec 14, 2023 at 12:06:39PM +0100, Alexander Potapenko wrote:
> Provide a config to collect the usage statistics for ARM MTE tag
> compression. This patch introduces allocation/deallocation counters
> for buffers that were stored uncompressed (and thus occupy 128 bytes of
> heap plus the Xarray overhead to store a pointer) and those that were
> compressed into 8-byte pointers (effectively using 0 bytes of heap in
> addition to the Xarray overhead).
>
> The counters are exposed to the userspace via
> /sys/kernel/debug/mteswap/stats:
>
> # cat /sys/kernel/debug/mteswap/stats
> 8 bytes: 102496 allocations, 67302 deallocations
> 128 bytes: 212234 allocations, 178278 deallocations
> uncompressed tag storage size: 8851200
> compressed tag storage size: 4346368
>
> Suggested-by: Yury Norov <yury.norov@gmail.com>
> Signed-off-by: Alexander Potapenko <glider@google.com>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Yury Norov <yury.norov@gmail.com>
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prev parent reply other threads:[~2023-12-14 20:22 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-14 11:06 [PATCH v10-mte 0/7] Implement MTE tag compression for swapped pages Alexander Potapenko
2023-12-14 11:06 ` [PATCH v10-mte 1/7] lib/bitmap: add bitmap_{read,write}() Alexander Potapenko
2023-12-14 19:48 ` Yury Norov
2023-12-14 11:06 ` [PATCH v10-mte 2/7] lib/test_bitmap: add tests for bitmap_{read,write}() Alexander Potapenko
2023-12-14 19:50 ` Yury Norov
2023-12-14 11:06 ` [PATCH v10-mte 3/7] lib/test_bitmap: use pr_info() for non-error messages Alexander Potapenko
2023-12-14 19:51 ` Yury Norov
2023-12-14 11:06 ` [PATCH v10-mte 4/7] arm64: mte: implement CONFIG_ARM64_MTE_COMP Alexander Potapenko
2023-12-14 20:16 ` Yury Norov
2023-12-15 15:19 ` Alexander Potapenko
2023-12-15 16:35 ` Yury Norov
2023-12-15 17:01 ` Yury Norov
2023-12-18 11:42 ` Alexander Potapenko
2023-12-18 11:45 ` Alexander Potapenko
2023-12-14 11:06 ` [PATCH v10-mte 5/7] arm64: mte: add a test for MTE tags compression Alexander Potapenko
2023-12-14 11:06 ` [PATCH v10-mte 6/7] arm64: mte: add compression support to mteswap.c Alexander Potapenko
2023-12-14 11:06 ` [PATCH v10-mte 7/7] arm64: mte: implement CONFIG_ARM64_MTE_SWAP_STATS Alexander Potapenko
2023-12-14 20:21 ` Yury Norov [this message]
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