Messages in this thread | | | From | Nathan Zimmer <> | Subject | [PATCH v2 linux-next 0/2] cpufreq: cpufreq_driver_lock is hot on large systems | Date | Tue, 5 Feb 2013 20:04:48 -0600 |
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I am noticing the cpufreq_driver_lock is quite hot. On an idle 512 system perf shows me most of the system time is spent on this lock. This is quite significant as top shows 5% of time in system time. My solution was to first convert the lock to a rwlock and then to the rcu.
v2: Rebase to linux-next
Nathan Zimmer (2): cpufreq: Convert the cpufreq_driver_lock to a rwlock cpufreq: Convert the cpufreq_driver_lock to use the rcu
drivers/cpufreq/cpufreq.c | 150 +++++++++++++++++++++++++--------------------- 1 file changed, 83 insertions(+), 67 deletions(-)
-- 1.8.0.1
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