Edit File: plugin_cpu.cpython-36.pyc
3 ��cXi � @ s~ d dl mZ d dlT ddlZddlmZ ddljZddl Z ddl Z ddl Z ddl Z ddl Z ejj� ZdZG dd� dej�ZdS ) � )�hotplug)�*� N)�commandsz$/sys/devices/system/cpu/cpu0/cpuidlec s e Zd ZdZ� fdd�Zdd� Zdd� Zedd � �Zd d � Z d d � Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Zdd� Zd d � Zd d � Zd d!� Z� fd"d#�Zdi� fd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zdjd1d2�Z dkd3d4�Z d5d6� Z d7d8� Z d9d:� Z e!d;d<d=�d>d?� �Z"e#d;�dld@dA��Z$dmdCdD�Z%e!dEd<dFdG�dHdI� �Z&e#dE�dndJdK��Z'dLdM� Z(dodNdO�Z)dPdQ� Z*e!dRd<d=�dSdT� �Z+dUdV� Z,dWdX� Z-dYdZ� Z.e#dR�dpd[d\��Z/d]d^� Z0e!d_d<d=�d`da� �Z1e#d_�dqdbdc��Z2e!ddd<d=�dedf� �Z3e#dd�drdgdh��Z4� Z5S )s�CPULatencyPlugina? `cpu`:: Sets the CPU governor to the value specified by the [option]`governor` option and dynamically changes the Power Management Quality of Service (PM QoS) CPU Direct Memory Access (DMA) latency according to the CPU load. `governor`::: The [option]`governor` option of the 'cpu' plug-in supports specifying CPU governors. Multiple governors are separated using '|'. The '|' character is meant to represent a logical 'or' operator. Note that the same syntax is used for the [option]`energy_perf_bias` option. *TuneD* will set the first governor that is available on the system. + For example, with the following profile, *TuneD* will set the 'ondemand' governor, if it is available. If it is not available, but the 'powersave' governor is available, 'powersave' will be set. If neither of them are available, the governor will not be changed. + .Specifying a CPU governor ==== ---- [cpu] governor=ondemand|powersave ---- ==== `sampling_down_factor`::: The sampling rate determines how frequently the governor checks to tune the CPU. The [option]`sampling_down_factor` is a tunable that multiplies the sampling rate when the CPU is at its highest clock frequency thereby delaying load evaluation and improving performance. Allowed values for sampling_down_factor are 1 to 100000. + .The recommended setting for jitter reduction ==== ---- [cpu] sampling_down_factor = 100 ---- ==== `energy_perf_bias`::: [option]`energy_perf_bias` supports managing energy vs. performance policy via x86 Model Specific Registers using the `x86_energy_perf_policy` tool. Multiple alternative Energy Performance Bias (EPB) values are supported. The alternative values are separated using the '|' character. The following EPB values are supported starting with kernel 4.13: "performance", "balance-performance", "normal", "balance-power" and "power". On newer processors is value writen straight to file (see rhbz#2095829) + .Specifying alternative Energy Performance Bias values ==== ---- [cpu] energy_perf_bias=powersave|power ---- *TuneD* will try to set EPB to 'powersave'. If that fails, it will try to set it to 'power'. ==== `energy_performance_preference`::: [option]`energy_performance_preference` supports managing energy vs. performance hints on some newer Intel processors. Multiple alternative Energy Performance Preferences (EPP) values are supported. The alternative values are separated using the '|' character. Available values can be found in `energy_performance_available_preferences` file in `CPUFreq` policy directory in `sysfs`. in + .Specifying alternative Energy Performance Hints values ==== ---- [cpu] energy_performance_preference=balance_power|power ---- *TuneD* will try to set EPP to 'balance_power'. If that fails, it will try to set it to 'power'. ==== `latency_low, latency_high, load_threshold`::: + If the CPU load is lower than the value specified by the[option]`load_threshold` option, the latency is set to the value specified either by the [option]`latency_high` option or by the [option]`latency_low` option. + `force_latency`::: You can also force the latency to a specific value and prevent it from dynamically changing further. To do so, set the [option]`force_latency` option to the required latency value. + The maximum latency value can be specified in several ways: + * by a numerical value in microseconds (for example, `force_latency=10`) * as the kernel CPU idle level ID of the maximum C-state allowed (for example, force_latency = cstate.id:1) * as a case sensitive name of the maximum C-state allowed (for example, force_latency = cstate.name:C1) * by using 'None' as a fallback value to prevent errors when alternative C-state IDs/names do not exist. When 'None' is used in the alternatives pipeline, all the alternatives that follow 'None' are ignored. + It is also possible to specify multiple fallback values separated by '|' as the C-state names and/or IDs may not be available on some systems. + .Specifying fallback C-state values ==== ---- [cpu] force_latency=cstate.name:C6|cstate.id:4|10 ---- This configuration tries to obtain and set the latency of C-state named C6. If the C-state C6 does not exist, kernel CPU idle level ID 4 (state4) latency is searched for in sysfs. Finally, if the state4 directory in sysfs is not found, the last latency fallback value is `10` us. The value is encoded and written into the kernel's PM QoS file `/dev/cpu_dma_latency`. ==== + .Specifying fallback C-state values using 'None'. ==== ---- [cpu] force_latency=cstate.name:XYZ|None ---- In this case, if C-state with the name `XYZ` does not exist [option]`force_latency`, no latency value will be written into the kernel's PM QoS file, and no errors will be reported due to the presence of 'None'. ==== `min_perf_pct, max_perf_pct, no_turbo`::: These options set the internals of the Intel P-State driver exposed via the kernel's `sysfs` interface. + .Adjusting the configuration of the Intel P-State driver ==== ---- [cpu] min_perf_pct=100 ---- Limit the minimum P-State that will be requested by the driver. It states it as a percentage of the max (non-turbo) performance level. ==== + `pm_qos_resume_latency_us`::: This option allow to set specific latency for all cpus or specific ones. ==== ---- [cpu] pm_qos_resume_latency_us=n/a ---- Special value that disables C-states completely. ==== ---- [cpu] pm_qos_resume_latency_us=0 ---- Allows all C-states. ==== ---- [cpu] pm_qos_resume_latency_us=100 ---- Allows any C-state with a resume latency less than value. c sf t t| �j||� d| _d| _d| _d| _d| _d| _d| _ d | _ d | _ d | _ i | _ t� | _d | _d S )NT�x86_64F)�superr �__init__� _has_pm_qos�_archZ_is_x86� _is_intel�_is_amd�_has_energy_perf_bias�_has_intel_pstate�_min_perf_pct_save�_max_perf_pct_save�_no_turbo_save�_governors_mapr �_cmd�_flags)�self�args�kwargs)� __class__� � /usr/lib/python3.6/plugin_cpu.pyr � s zCPULatencyPlugin.__init__c C s> d| _ t� | _x"| jjd�D ]}| jj|j� q W t� | _d S )NT�cpu)Z_devices_supported�setZ _free_devices�_hardware_inventoryZ get_devices�addZsys_nameZ_assigned_devices)r �devicer r r � _init_devices� s z CPULatencyPlugin._init_devicesc s � fdd�|D �S )Nc s g | ]}� j jd |��qS )r )r Z get_device)�.0�x)r r r � <listcomp>� s z8CPULatencyPlugin._get_device_objects.<locals>.<listcomp>r )r Zdevicesr )r r �_get_device_objects� s z$CPULatencyPlugin._get_device_objectsc C s dddd d d d d d d d d d� S )Ng�������?�d i� ) �load_threshold� latency_low� latency_high� force_latency�governor�sampling_down_factor�energy_perf_bias� min_perf_pct� max_perf_pct�no_turbo�pm_qos_resume_latency_us� energy_performance_preferencer )r r r r �_get_config_options� s z$CPULatencyPlugin._get_config_optionsc C s� dddddg}t j� | _| j|krttj� }|jjd�}|dkrFd| _n |d ksV|d kr^d| _nd| _t j d | � nt j d | j � | jdkr�| j � | j � d S ) Nr Zi686Zi585Zi486Zi386Z vendor_idZ GenuineIntelTZ AuthenticAMDZ HygonGenuinez$We are running on an x86 %s platformz We are running on %s (non x86)) �platform�machiner �procfs�cpuinfo�tags�getr r �log�info�_check_energy_perf_bias�_check_intel_pstate)r Z intel_archsr Zvendorr r r � _check_arch� s z CPULatencyPlugin._check_archc C sb d| _ d}| jjddgtj|gd�\}}|dkr@|dkr@d| _ n |dk rTtjd � n tjd � d S ) NFr �x86_energy_perf_policyz-r)Z no_errorsr � Tzgunable to run x86_energy_perf_policy tool, ignoring CPU energy performance bias, is the tool installed?zXyour CPU doesn't support MSR_IA32_ENERGY_PERF_BIAS, ignoring CPU energy performance bias)r r �execute�errno�ENOENTr: �warning)r Zretcode_unsupported�retcode�outr r r r< s z(CPULatencyPlugin._check_energy_perf_biasc C s" t jjd�| _| jr tjd� d S )Nz$/sys/devices/system/cpu/intel_pstatezintel_pstate detected)�os�path�existsr r: r; )r r r r r= s z$CPULatencyPlugin._check_intel_pstatec C s$ | j d kr tj� jjdg �| _ | j S )N�flags)r r6 r7 r8 r9 )r r r r �_get_cpuinfo_flags s z#CPULatencyPlugin._get_cpuinfo_flagsc C s t |�}| jjt |�jdd��S )Nr r@ )�strr Z is_cpu_online�replace)r r Zsdr r r �_is_cpu_online s z CPULatencyPlugin._is_cpu_onlinec C s t jjd| �S )Nz3/sys/devices/system/cpu/%s/cpufreq/scaling_governor)rG rH rI )r r r r r �_cpu_has_scaling_governor$ s z*CPULatencyPlugin._cpu_has_scaling_governorc C s< | j |�s tjd| � dS | j|�s8tjd| � dS dS )Nz '%s' is not online, skippingFz.there is no scaling governor fo '%s', skippingT)rN r: �debugrO )r r r r r � _check_cpu_can_change_governor' s z/CPULatencyPlugin._check_cpu_can_change_governorc C s� d|_ d|_t| jj� �d |kr�d|_ytjtj tj �| _ W n* t k rh t jdtj � d| _Y nX d | _|jd d kr�|jd d kr�| jjdd �|_d|_nd |_| j� nd|_t jd|j � yt|j�d |_W n tk r� d |_Y nX d S ) NTFr z-Unable to open '%s', disabling PM_QoS controlr* r1 �loadzILatency settings from non-first CPU plugin instance '%s' will be ignored.)Z_has_static_tuningZ_has_dynamic_tuning�listZ _instances�values�_first_instancerG �open�constsZPATH_CPU_DMA_LATENCY�O_WRONLY�_cpu_latency_fd�OSErrorr: �errorr �_latency�options�_monitors_repositoryZcreate� _load_monitorr> r; 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Is the value in the profile correct?z�energy_performance_available_preferences file missing, which can happen if the system is booted without the intel_pstate driver.)rN r: rP r� rG rH rI r� r� r r rh rl r; r� r[ rL )r r2 r r� r� r� Z avail_valsrm r r r �"_set_energy_performance_preference� s& z3CPULatencyPlugin._set_energy_performance_preferencec C s^ | j |�s tjd| � d S |jd�}tjj| j|d��rP| jj | j|��j � S tjd� d S )Nz%s is not online, skippingr Tz�energy_performance_available_preferences file missing, which can happen if the system is booted without the intel_pstate driver.) rN r: rP r� rG rH rI r� r rh ri )r r r� r� r r r �"_get_energy_performance_preference� s z3CPULatencyPlugin._get_energy_performance_preference)F)F)F)F)r� )F)F)F)F)F)6�__name__� __module__� __qualname__�__doc__r r! r% � classmethodr3 r> r< r= rK rN rO rQ rd rg rk rn rq rr ru rw rv rz r r� r� r� r� rt r� Z command_setr� Z command_getr� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� � __classcell__r r )r r r sj + 7 r )r@ r Z decoratorsZ tuned.logsZtunedZtuned.utils.commandsr Z tuned.constsrW rG r� rB r4 r6 Zlogsr9 r: r� ZPluginr r r r r �<module> s