From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-edac@vger.kernel.org, X86 ML <x86@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
bberg@redhat.com, bp@suse.de
Subject: Re: [PATCH 3/3] x86/mce/therm_throt: allow disabling the thermal vector altogether
Date: Tue, 14 Apr 2020 07:45:14 -0700 [thread overview]
Message-ID: <4b75ec34ccff5abdc0b1c04a5ac39455ddd4f49b.camel@linux.intel.com> (raw)
In-Reply-To: <CAHmME9pigvAgK3Bje6DkFEcdyWwi7-C7D6QEo4YiH_cbJvxqhQ@mail.gmail.com>
On Mon, 2020-04-13 at 22:21 -0600, Jason A. Donenfeld wrote:
> On Mon, Apr 13, 2020 at 9:38 PM Srinivas Pandruvada
> <srinivas.pandruvada@linux.intel.com> wrote:
> > On Tue, 2020-04-07 at 00:33 -0600, Jason A. Donenfeld wrote:
> > > The thermal IRQ handler uses 1.21% CPU on my system when it's hot
> > > from
> > > compiling things. Indeed looking at /proc/interrupts reveals
> > > quite a
> > > lot
> > I am curious why you are hitting threshold frequently?
> > What is rdmsr 0x1a2
>
> 5640000
You are getting too many interrupts at 95C. You should look at your
cooling system.
>
> > > of events coming in. Beyond logging them, the existing drivers on
> > > the
> > > system don't appear to do very much that I'm interested in. So,
> > > add a
> > > way to disable this entirely so that I can regain precious CPU
> > > cycles.
> > It is showing amount of time system is running in a constrained
> > environment. Lots of real time and HPC folks really care about
> > this.
>
> Which is why this patch adds an option, not a full removal or
> something. Real time and HPC people can keep their expensive
> interrupt. Other people with different varieties of system
> disable
> it.
Generally compile time flag is not desirable. If it is what required
then we should have boot time flag something in lines of existing
"int_pln_enable" option.
Thanks,
Srinivas
next prev parent reply other threads:[~2020-04-14 14:45 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 6:33 [PATCH 1/3] x86/mce/therm_throt: remove unused platform_thermal_notify function pointer Jason A. Donenfeld
2020-04-07 6:33 ` [PATCH 2/3] x86/mce/therm_throt: allow disabling verbose logging Jason A. Donenfeld
2020-04-07 6:33 ` [PATCH 3/3] x86/mce/therm_throt: allow disabling the thermal vector altogether Jason A. Donenfeld
2020-04-14 3:38 ` Srinivas Pandruvada
2020-04-14 4:21 ` Jason A. Donenfeld
2020-04-14 14:45 ` Srinivas Pandruvada [this message]
2020-04-14 19:41 ` Jason A. Donenfeld
2020-04-14 19:58 ` Srinivas Pandruvada
2020-04-14 20:09 ` Jason A. Donenfeld
2020-04-14 20:23 ` Borislav Petkov
2020-04-14 20:49 ` Srinivas Pandruvada
2020-04-14 21:07 ` Jason A. Donenfeld
2020-04-14 21:51 ` Srinivas Pandruvada
2020-04-14 21:40 ` Peter Zijlstra
2020-04-14 21:44 ` Srinivas Pandruvada
2020-04-13 21:09 ` [PATCH 1/3] x86/mce/therm_throt: remove unused platform_thermal_notify function pointer Jason A. Donenfeld
2020-04-14 3:55 ` Srinivas Pandruvada
2020-04-14 4:21 ` Jason A. Donenfeld
2020-04-14 14:49 ` Srinivas Pandruvada
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