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cpuidle: create processor.latency_factor tunable 

Start with default value of 6, so by default,
there is no functional change in this patch.

Signed-off-by: Len Brown <len.brown@intel.com>
hifive-unleashed-5.1
Len Brown 2007-12-13 23:50:45 -05:00
parent 60555e371d
commit 4963f62045
1 changed files with 4 additions and 1 deletions
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5
drivers/acpi/processor_idle.c
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@ -94,6 +94,9 @@ module_param(bm_history, uint, 0644);
static int acpi_processor_set_power_policy(struct acpi_processor *pr);
#else /* CONFIG_CPU_IDLE */
static unsigned int latency_factor __read_mostly = 6;
module_param(latency_factor, uint, 0644);
#endif
/*
@ -1576,7 +1579,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i);
state->exit_latency = cx->latency;
state->target_residency = cx->latency * 6;
state->target_residency = cx->latency * latency_factor;
state->power_usage = cx->power;
state->flags = 0;