From: Viresh Kumar <viresh.kumar@linaro.org>
To: Sumit Gupta <sumitg@nvidia.com>
Cc: rjw@rjwysocki.net, catalin.marinas@arm.com, will@kernel.org,
thierry.reding@gmail.com, jonathanh@nvidia.com, talho@nvidia.com,
linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, bbasu@nvidia.com,
mperttunen@nvidia.com
Subject: Re: [TEGRA194_CPUFREQ Patch 2/3] cpufreq: Add Tegra194 cpufreq driver
Date: Thu, 16 Apr 2020 09:07:15 +0530 [thread overview]
Message-ID: <20200416033715.hscztwkxie2o5i3r@vireshk-i7> (raw)
In-Reply-To: <d6e0eed6-4267-fca9-59e1-02d16e17ff34@nvidia.com>
On 15-04-20, 16:55, Sumit Gupta wrote:
>
>
> On 14/04/20 11:15 AM, Viresh Kumar wrote:
> > External email: Use caution opening links or attachments
> >
> >
> > On 13-04-20, 17:50, Sumit Gupta wrote:
> > > This was done considering long delay value as explained previously.
> > > Do you think that smp_call_function_single() would be better than work queue
> > > here?
> >
> > Don't work with assumptions, you should test both and see which one
> > works better. Workqueue should never be faster than
> > smp_call_function_single() with my understanding.
> Checked the time taken and its almost same in both cases.
> Earlier we used smp_call_function_single(), but delay time period was small
> in that SOC. In T194, the time period was more. So, this is an optimization
> done because using work queue has advantage as interrupts will not be
> disabled for that period.
Hmm, okay, keep the workqueue and mention the required details in a
comment for everyone to understand why the implementation is done that
way.
--
viresh
next prev parent reply other threads:[~2020-04-16 3:37 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 17:32 [TEGRA194_CPUFREQ Patch 1/3] firmware: tegra: adding function to get BPMP data Sumit Gupta
2019-12-03 17:32 ` [TEGRA194_CPUFREQ Patch 2/3] cpufreq: Add Tegra194 cpufreq driver Sumit Gupta
2019-12-04 5:40 ` Viresh Kumar
2019-12-04 10:55 ` sumitg
2019-12-04 11:27 ` Viresh Kumar
2019-12-04 13:57 ` Dmitry Osipenko
2019-12-05 2:51 ` Viresh Kumar
2019-12-05 12:55 ` Dmitry Osipenko
2020-03-25 23:59 ` sumitg
2019-12-04 13:59 ` Dmitry Osipenko
2019-12-05 14:15 ` Dmitry Osipenko
2020-03-26 11:50 ` Viresh Kumar
2020-04-04 18:38 ` sumitg
2020-04-06 2:55 ` Viresh Kumar
2020-04-07 18:18 ` sumitg
2020-04-08 5:53 ` Viresh Kumar
2020-04-08 11:24 ` sumitg
2020-04-09 7:44 ` Viresh Kumar
2020-04-09 11:21 ` Sumit Gupta
2020-04-13 6:21 ` Viresh Kumar
2020-04-13 12:20 ` Sumit Gupta
2020-04-14 5:45 ` Viresh Kumar
2020-04-15 11:25 ` Sumit Gupta
2020-04-16 3:37 ` Viresh Kumar [this message]
2020-04-16 7:06 ` Sumit Gupta
2019-12-03 17:32 ` [TEGRA194_CPUFREQ Patch 3/3] arm64: defconfig: Enable CONFIG_ARM_TEGRA194_CPUFREQ Sumit Gupta
2019-12-03 17:42 ` [TEGRA194_CPUFREQ Patch 1/3] firmware: tegra: adding function to get BPMP data Thierry Reding
2019-12-04 8:45 ` Mikko Perttunen
2019-12-04 9:17 ` Viresh Kumar
2019-12-04 9:33 ` Thierry Reding
2019-12-04 9:51 ` Viresh Kumar
2020-04-07 10:05 ` Thierry Reding
2020-04-27 7:18 ` Thierry Reding
2020-04-29 8:21 ` Sumit Gupta
2020-05-06 16:58 ` Thierry Reding
2020-05-20 14:43 ` Rob Herring
2020-05-20 15:38 ` Thierry Reding
2020-05-20 16:21 ` Rob Herring
2019-12-04 10:21 ` Mikko Perttunen
2019-12-04 10:26 ` Viresh Kumar
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