From dc32fa97041780b1f9f73ff43f754253f054a7bc Mon Sep 17 00:00:00 2001 From: Brendan Jackman Date: Wed, 17 May 2017 10:43:34 +0100 Subject: [PATCH] cpufreq: Add iter_domains method It's common to want to do an operation on cpufreq that affects all CPUs, but doing so explicitly for all CPUs can be unnecessarily slow when it only needs to be done once for each cpufreq policy. Add a method to abstract the pattern of iteration. --- devlib/module/cpufreq.py | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/devlib/module/cpufreq.py b/devlib/module/cpufreq.py index d72b8fd..01fb79b 100644 --- a/devlib/module/cpufreq.py +++ b/devlib/module/cpufreq.py @@ -421,3 +421,14 @@ class CpufreqModule(Module): sysfile = '/sys/devices/system/cpu/{}/cpufreq/affected_cpus'.format(cpu) return [int(c) for c in self.target.read_value(sysfile).split()] + + def iter_domains(self): + """ + Iterate over the frequency domains in the system + """ + cpus = set(range(self.target.number_of_cpus)) + while cpus: + cpu = iter(cpus).next() + domain = self.target.cpufreq.get_domain_cpus(cpu) + yield domain + cpus = cpus.difference(domain)