From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
To: Jon Kohler <jon@nutanix.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>,
Len Brown <lenb@kernel.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] intel_idle: add CPUIDLE_FLAG_IRQ_ENABLE to SPR C1 and C1E
Date: Sun, 12 Nov 2023 13:52:12 +0200 [thread overview]
Message-ID: <e0869b55706915821a6aa1ba0140a784d263b01e.camel@linux.intel.com> (raw)
In-Reply-To: <22D82855-259A-425A-B401-2F51EEC3C746@nutanix.com>
On Fri, 2023-11-10 at 20:00 +0000, Jon Kohler wrote:
> CPUIDLE_FLAG_IRQ_ENABLE
Hi, yes, I did run several experiments, and found that this change would make
some micro benchmarks give worse score. I did a lot of repetitions assuming I
was mixing noise with signal, but every time confirmed that enabling interrupts
in C1 made the score worse (like 1%).
I do not have explanation for this phenomena, but decided to not pursue this
idea.
Artem.
next prev parent reply other threads:[~2023-11-12 11:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-30 19:43 [PATCH] intel_idle: add CPUIDLE_FLAG_IRQ_ENABLE to SPR C1 and C1E Jon Kohler
2022-07-01 13:30 ` Artem Bityutskiy
2022-07-01 14:06 ` Jon Kohler
2023-11-10 20:00 ` Jon Kohler
2023-11-12 11:52 ` Artem Bityutskiy [this message]
2023-11-13 15:20 ` Jon Kohler
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