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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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WARNING: multiple messages have this Message-ID (diff)
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>

  reply	other threads:[~2023-12-14 20:22 UTC|newest]

Thread overview: 36+ 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 ` Alexander Potapenko
2023-12-14 11:06 ` [PATCH v10-mte 1/7] lib/bitmap: add bitmap_{read,write}() Alexander Potapenko
2023-12-14 11:06   ` Alexander Potapenko
2023-12-14 19:48   ` Yury Norov
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 11:06   ` Alexander Potapenko
2023-12-14 19:50   ` Yury Norov
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 11:06   ` Alexander Potapenko
2023-12-14 19:51   ` Yury Norov
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 11:06   ` Alexander Potapenko
2023-12-14 20:16   ` Yury Norov
2023-12-14 20:16     ` Yury Norov
2023-12-15 15:19     ` Alexander Potapenko
2023-12-15 15:19       ` Alexander Potapenko
2023-12-15 16:35       ` Yury Norov
2023-12-15 16:35         ` Yury Norov
2023-12-15 17:01         ` Yury Norov
2023-12-15 17:01           ` Yury Norov
2023-12-18 11:42           ` Alexander Potapenko
2023-12-18 11:42             ` Alexander Potapenko
2023-12-18 11:45         ` 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   ` 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   ` 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 11:06   ` Alexander Potapenko
2023-12-14 20:21   ` Yury Norov [this message]
2023-12-14 20:21     ` Yury Norov

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