From: Dave Hansen <dave.hansen@intel.com>
To: Kohei Tarumizu <tarumizu.kohei@fujitsu.com>,
catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
x86@kernel.org, hpa@zytor.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 0/8] Add hardware prefetch control driver for arm64 and x86
Date: Mon, 14 Mar 2022 12:19:21 -0700 [thread overview]
Message-ID: <40b468cb-5144-77f0-963a-67e81d2e3aa4@intel.com> (raw)
In-Reply-To: <20220311101940.3403607-1-tarumizu.kohei@fujitsu.com>
On 3/11/22 02:19, Kohei Tarumizu wrote:
> The advantage of using this is improved performance. As an example of
> performance improvements, the results of running the Stream benchmark
> on the A64FX are described in section [Merit].
I take it that there are users out there today that are sufficiently
motivated by the increased performance that they just do "wrmsr 0x1a4
0x1234".
You talked about this in the "[Merit]" section. But, that's a _little_
unconvincing. I don't doubt that there is *a* workload out there that
can benefit from hardware prefetcher tweaks.
Do we really expect end users to run their workloads and tweak these
values to find something optimal for them?
next prev parent reply other threads:[~2022-03-14 19:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-11 10:19 [PATCH v2 0/8] Add hardware prefetch control driver for arm64 and x86 Kohei Tarumizu
2022-03-11 10:19 ` [PATCH v2 1/8] drivers: base: Add hardware prefetch control core driver Kohei Tarumizu
2022-03-11 10:19 ` [PATCH v2 2/8] drivers: base: Add Kconfig/Makefile to build " Kohei Tarumizu
2022-03-11 10:19 ` [PATCH v2 3/8] arm64: Add hardware prefetch control support for ARM64 Kohei Tarumizu
2022-03-30 22:11 ` Rob Herring
2022-04-04 11:56 ` tarumizu.kohei
2022-03-11 10:19 ` [PATCH v2 4/8] arm64: Add Kconfig/Makefile to build hardware prefetch control driver Kohei Tarumizu
2022-03-11 10:19 ` [PATCH v2 5/8] arm64: Create cache sysfs directory without ACPI PPTT for hardware prefetch control Kohei Tarumizu
2022-03-30 22:14 ` Rob Herring
2022-04-04 11:48 ` tarumizu.kohei
2022-03-11 10:19 ` [PATCH v2 6/8] x86: Add hardware prefetch control support for x86 Kohei Tarumizu
2022-03-14 21:05 ` Dave Hansen
2022-03-18 6:41 ` tarumizu.kohei
2022-03-11 10:19 ` [PATCH v2 7/8] x86: Add Kconfig/Makefile to build hardware prefetch control driver Kohei Tarumizu
2022-03-11 10:19 ` [PATCH v2 8/8] docs: ABI: Add sysfs documentation interface of " Kohei Tarumizu
2022-03-14 16:39 ` Jonathan Cameron
2022-03-16 12:56 ` tarumizu.kohei
2022-03-14 19:19 ` Dave Hansen [this message]
2022-03-18 6:34 ` [PATCH v2 0/8] Add hardware prefetch control driver for arm64 and x86 tarumizu.kohei
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