From: Quentin Perret <qperret@google.com>
To: Vincent Donnefort <vincent.donnefort@arm.com>
Cc: peterz@infradead.org, rjw@rjwysocki.net, viresh.kumar@linaro.org,
vincent.guittot@linaro.org, linux-kernel@vger.kernel.org,
ionela.voinescu@arm.com, lukasz.luba@arm.com,
dietmar.eggemann@arm.com
Subject: Re: [PATCH v2 3/3] PM / EM: Skip inefficient OPPs
Date: Tue, 25 May 2021 09:33:01 +0000 [thread overview]
Message-ID: <YKzETaPD/Flnz+dz@google.com> (raw)
In-Reply-To: <1621616064-340235-4-git-send-email-vincent.donnefort@arm.com>
On Friday 21 May 2021 at 17:54:24 (+0100), Vincent Donnefort wrote:
> @@ -161,6 +162,8 @@ static int em_create_perf_table(struct device *dev, struct em_perf_domain *pd,
> table[i].cost = div64_u64(fmax * table[i].power,
> table[i].frequency);
> if (table[i].cost >= prev_cost) {
> + table[i].flags = EM_PERF_STATE_INEFFICIENT;
> + pd->flags |= EM_PERF_DOMAIN_INEFFICIENCIES;
If we're looking for micro-optimizations, then perhaps you could store
the index of the next efficient OPP (which would be 'i' if the current
OPP is already efficient), so you can jump to it directly when doing the
search.
> dev_dbg(dev, "EM: OPP:%lu is inefficient\n",
> table[i].frequency);
> } else {
next prev parent reply other threads:[~2021-05-25 9:33 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-21 16:54 [PATCH v2 0/3] EM / PM: Inefficient OPPs Vincent Donnefort
2021-05-21 16:54 ` [PATCH v2 1/3] PM / EM: Fix inefficient state detection Vincent Donnefort
2021-05-24 12:41 ` Lukasz Luba
2021-05-25 9:50 ` Quentin Perret
2021-05-21 16:54 ` [PATCH v2 2/3] PM / EM: Extend em_perf_domain with a flag field Vincent Donnefort
2021-05-24 12:44 ` Lukasz Luba
2021-05-25 9:54 ` Quentin Perret
2021-05-21 16:54 ` [PATCH v2 3/3] PM / EM: Skip inefficient OPPs Vincent Donnefort
2021-05-24 12:55 ` Lukasz Luba
2021-05-25 8:48 ` Peter Zijlstra
2021-05-25 9:21 ` Vincent Donnefort
2021-05-25 10:00 ` Vincent Donnefort
2021-05-28 5:09 ` Viresh Kumar
2021-06-01 8:47 ` Vincent Donnefort
2021-06-01 8:56 ` Viresh Kumar
2021-06-01 9:07 ` Quentin Perret
2021-06-01 9:13 ` Viresh Kumar
2021-05-25 9:33 ` Quentin Perret [this message]
2021-05-25 9:46 ` Vincent Donnefort
2021-05-25 11:03 ` Lukasz Luba
2021-05-25 13:06 ` Quentin Perret
2021-05-25 13:34 ` Lukasz Luba
2021-05-25 9:47 ` Vincent Donnefort
2021-05-28 5:04 ` Viresh Kumar
2021-05-28 9:00 ` Lukasz Luba
2021-05-26 3:47 ` [PATCH v2 0/3] EM / PM: Inefficient OPPs Viresh Kumar
2021-05-26 8:56 ` Lukasz Luba
2021-05-26 9:33 ` Viresh Kumar
2021-05-27 7:13 ` Lukasz Luba
2021-05-26 9:01 ` Vincent Donnefort
2021-05-26 9:38 ` Viresh Kumar
2021-05-26 9:39 ` Viresh Kumar
2021-05-26 10:24 ` Lukasz Luba
2021-05-26 10:39 ` Lukasz Luba
2021-05-26 11:50 ` Lukasz Luba
2021-05-26 13:49 ` Vincent Donnefort
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