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examples/vm_power_mgr: add scale to medium freq fn

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Signed-off-by: Nemanja Marjanovic <nemanja.marjanovic@intel.com>
Signed-off-by: Rory Sexton <rory.sexton@intel.com>
Signed-off-by: David Hunt <david.hunt@intel.com>
Reviewed-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
This commit is contained in:
David Hunt 2017-10-11 17:18:50 +01:00 committed by Ferruh Yigit
parent dff22404aa
commit 7f472f7486
2 changed files with 40 additions and 5 deletions
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32
examples/vm_power_manager/power_manager.c
View File

@ -108,7 +108,7 @@ set_host_cpus_mask(void)
int
power_manager_init(void)
{
unsigned i, num_cpus;
unsigned int i, num_cpus, num_freqs;
uint64_t cpu_mask;
int ret = 0;
@ -121,15 +121,21 @@ power_manager_init(void)
rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
cpu_mask = global_enabled_cpus;
for (i = 0; cpu_mask; cpu_mask &= ~(1 << i++)) {
if (rte_power_init(i) < 0 || rte_power_freqs(i,
global_core_freq_info[i].freqs,
RTE_MAX_LCORE_FREQS) == 0) {
RTE_LOG(ERR, POWER_MANAGER, "Unable to initialize power manager "
if (rte_power_init(i) < 0)
RTE_LOG(ERR, POWER_MANAGER,
"Unable to initialize power manager "
"for core %u\n", i);
num_freqs = rte_power_freqs(i, global_core_freq_info[i].freqs,
RTE_MAX_LCORE_FREQS);
if (num_freqs == 0) {
RTE_LOG(ERR, POWER_MANAGER,
"Unable to get frequency list for core %u\n",
i);
global_enabled_cpus &= ~(1 << i);
num_cpus--;
ret = -1;
}
global_core_freq_info[i].num_freqs = num_freqs;
rte_spinlock_init(&global_core_freq_info[i].power_sl);
}
RTE_LOG(INFO, POWER_MANAGER, "Detected %u host CPUs , enabled core mask:"
@ -286,3 +292,19 @@ power_manager_disable_turbo_core(unsigned int core_num)
POWER_SCALE_CORE(disable_turbo, core_num, ret);
return ret;
}
int
power_manager_scale_core_med(unsigned int core_num)
{
int ret = 0;
if (core_num >= POWER_MGR_MAX_CPUS)
return -1;
if (!(global_enabled_cpus & (1ULL << core_num)))
return -1;
rte_spinlock_lock(&global_core_freq_info[core_num].power_sl);
ret = rte_power_set_freq(core_num,
global_core_freq_info[core_num].num_freqs / 2);
rte_spinlock_unlock(&global_core_freq_info[core_num].power_sl);
return ret;
}

13
examples/vm_power_manager/power_manager.h
View File

@ -231,6 +231,19 @@ int power_manager_disable_turbo_core(unsigned int core_num);
*/
uint32_t power_manager_get_current_frequency(unsigned core_num);
/**
* Scale to medium frequency for the core specified by core_num.
* It is thread-safe.
*
* @param core_num
* The core number to change frequency
*
* @return
* - 1 on success.
* - 0 if frequency not changed.
* - Negative on error.
*/
int power_manager_scale_core_med(unsigned int core_num);
#ifdef __cplusplus
}