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Edit: plugin_scheduler.cpython-36.pyc
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It changes process/thread affinities, IRQs affinities and it sets `default_smp_affinity` for IRQs. The CPU affinity mask is adjusted for all processes and threads matching [option]`ps_whitelist` option subject to success of the `sched_setaffinity()` system call. The default setting of the [option]`ps_whitelist` regular expression is `.*` to match all processes and thread names. To exclude certain processes and threads use [option]`ps_blacklist` option. The value of this option is also interpreted as a regular expression and process/thread names (`ps -eo cmd`) are matched against that expression. Profile rollback allows all matching processes and threads to run on all CPUs and restores the IRQ settings prior to the profile application. + Multiple regular expressions for [option]`ps_whitelist` and [option]`ps_blacklist` options are allowed and separated by `;`. Quoted semicolon `\;` is taken literally. + .Isolate CPUs 2-4 ==== ---- [scheduler] isolated_cores=2-4 ps_blacklist=.*pmd.*;.*PMD.*;^DPDK;.*qemu-kvm.* ---- Isolate CPUs 2-4 while ignoring processes and threads matching `ps_blacklist` regular expressions. ==== The [option]`irq_process` option controls whether the scheduler plugin applies the `isolated_cores` parameter to IRQ affinities. The default value is `true`, which means that the scheduler plugin will move all possible IRQs away from the isolated cores. When `irq_process` is set to `false`, the plugin will not change any IRQ affinities. ==== The [option]`default_irq_smp_affinity` option controls the values *TuneD* writes to `/proc/irq/default_smp_affinity`. The file specifies default affinity mask that applies to all non-active IRQs. Once an IRQ is allocated/activated its affinity bitmask will be set to the default mask. + The following values are supported: + -- `calc`:: Content of `/proc/irq/default_smp_affinity` will be calculated from the `isolated_cores` parameter. Non-isolated cores are calculated as an inversion of the `isolated_cores`. Then the intersection of the non-isolated cores and the previous content of `/proc/irq/default_smp_affinity` is written to `/proc/irq/default_smp_affinity`. If the intersection is an empty set, then just the non-isolated cores are written to `/proc/irq/default_smp_affinity`. This behavior is the default if the parameter `default_irq_smp_affinity` is omitted. `ignore`:: *TuneD* will not touch `/proc/irq/default_smp_affinity`. explicit cpulist:: The cpulist (such as 1,3-4) is unpacked and written directly to `/proc/irq/default_smp_affinity`. -- + .An explicit CPU list to set the default IRQ smp affinity to CPUs 0 and 2 ==== ---- [scheduler] isolated_cores=1,3 default_irq_smp_affinity=0,2 ---- ==== To adjust scheduling policy, priority and affinity for a group of processes/threads, use the following syntax. + [subs="+quotes,+macros"] ---- group.__groupname__=__rule_prio__:__sched__:__prio__:__affinity__:__regex__ ---- + where `__rule_prio__` defines internal *TuneD* priority of the rule. Rules are sorted based on priority. This is needed for inheritence to be able to reorder previously defined rules. Equal `__rule_prio__` rules should be processed in the order they were defined. However, this is Python interpreter dependant. To disable an inherited rule for `__groupname__` use: + [subs="+quotes,+macros"] ---- group.__groupname__= ---- + `__sched__` must be one of: *`f`* for FIFO, *`b`* for batch, *`r`* for round robin, *`o`* for other, *`*`* do not change. + `__affinity__` is CPU affinity in hexadecimal. Use `*` for no change. + `__prio__` scheduling priority (see `chrt -m`). + `__regex__` is Python regular expression. It is matched against the output of + [subs="+quotes,+macros"] ---- ps -eo cmd ---- + Any given process name may match more than one group. In such a case, the priority and scheduling policy are taken from the last matching `__regex__`. + .Setting scheduling policy and priorities to kernel threads and watchdog ==== ---- [scheduler] group.kthreads=0:*:1:*:\[.*\]$ group.watchdog=0:f:99:*:\[watchdog.*\] ---- ==== + The scheduler plug-in uses perf event loop to catch newly created processes. By default it listens to `perf.RECORD_COMM` and `perf.RECORD_EXIT` events. By setting [option]`perf_process_fork` option to `true`, `perf.RECORD_FORK` events will be also listened to. In other words, child processes created by the `fork()` system call will be processed. Since child processes inherit CPU affinity from their parents, the scheduler plug-in usually does not need to explicitly process these events. As processing perf events can pose a significant CPU overhead, the [option]`perf_process_fork` option parameter is set to `false` by default. Due to this, child processes are not processed by the scheduler plug-in. + The CPU overhead of the scheduler plugin can be mitigated by using the scheduler [option]`runtime` option and setting it to `0`. This will completely disable the dynamic scheduler functionality and the perf events will not be monitored and acted upon. The disadvantage ot this approach is the procees/thread tuning will be done only at profile application. + .Disabling the scheduler dynamic functionality ==== ---- [scheduler] runtime=0 isolated_cores=1,3 ---- ==== + NOTE: For perf events, memory mapped buffer is used. Under heavy load the buffer may overflow. In such cases the `scheduler` plug-in may start missing events and failing to process some newly created processes. Increasing the buffer size may help. The buffer size can be set with the [option]`perf_mmap_pages` option. The value of this parameter has to expressed in powers of 2. If it is not the power of 2, the nearest higher power of 2 value is calculated from it and this calculated value used. If the [option]`perf_mmap_pages` option is omitted, the default kernel value is used. + The scheduler plug-in supports process/thread confinement using cgroups v1. + [option]`cgroup_mount_point` option specifies the path to mount the cgroup filesystem or where *TuneD* expects it to be mounted. If unset, `/sys/fs/cgroup/cpuset` is expected. + If [option]`cgroup_groups_init` option is set to `1` *TuneD* will create (and remove) all cgroups defined with the `cgroup*` options. This is the default behavior. If it is set to `0` the cgroups need to be preset by other means. + If [option]`cgroup_mount_point_init` option is set to `1`, *TuneD* will create (and remove) the cgroup mountpoint. It implies `cgroup_groups_init = 1`. If set to `0` the cgroups mount point needs to be preset by other means. This is the default behavior. + The [option]`cgroup_for_isolated_cores` option is the cgroup name used for the [option]`isolated_cores` option functionality. For example, if a system has 4 CPUs, `isolated_cores=1` means that all processes/threads will be moved to CPUs 0,2-3. The scheduler plug-in will isolate the specified core by writing the calculated CPU affinity to the `cpuset.cpus` control file of the specified cgroup and move all the matching processes/threads to this group. If this option is unset, classic cpuset affinity using `sched_setaffinity()` will be used. + [option]`cgroup.__cgroup_name__` option defines affinities for arbitrary cgroups. Even hierarchic cgroups can be used, but the hieararchy needs to be specified in the correct order. Also *TuneD* does not do any sanity checks here, with the exception that it forces the cgroup to be under [option]`cgroup_mount_point`. + The syntax of the scheduler option starting with `group.` has been augmented to use `cgroup.__cgroup_name__` instead of the hexadecimal `__affinity__`. The matching processes will be moved to the cgroup `__cgroup_name__`. It is also possible to use cgroups which have not been defined by the [option]`cgroup.` option as described above, i.e. cgroups not managed by *TuneD*. + All cgroup names are sanitized by replacing all all dots (`.`) with slashes (`/`). This is to prevent the plug-in from writing outside [option]`cgroup_mount_point`. + .Using cgroups v1 with the scheduler plug-in ==== ---- [scheduler] cgroup_mount_point=/sys/fs/cgroup/cpuset cgroup_mount_point_init=1 cgroup_groups_init=1 cgroup_for_isolated_cores=group cgroup.group1=2 cgroup.group2=0,2 group.ksoftirqd=0:f:2:cgroup.group1:ksoftirqd.* ps_blacklist=ksoftirqd.*;rcuc.*;rcub.*;ktimersoftd.* isolated_cores=1 ---- Cgroup `group1` has the affinity set to CPU 2 and the cgroup `group2` to CPUs 0,2. Given a 4 CPU setup, the [option]`isolated_cores=1` option causes all processes/threads to be moved to CPU cores 0,2-3. Processes/threads that are blacklisted by the [option]`ps_blacklist` regular expression will not be moved. The scheduler plug-in will isolate the specified core by writing the CPU affinity 0,2-3 to the `cpuset.cpus` control file of the `group` and move all the matching processes/threads to this cgroup. ==== Option [option]`cgroup_ps_blacklist` allows excluding processes which belong to the blacklisted cgroups. The regular expression specified by this option is matched against cgroup hierarchies from `/proc/PID/cgroups`. Cgroups v1 hierarchies from `/proc/PID/cgroups` are separated by commas ',' prior to regular expression matching. The following is an example of content against which the regular expression is matched against: `10:hugetlb:/,9:perf_event:/,8:blkio:/` + Multiple regular expressions can be separated by semicolon ';'. The semicolon represents a logical 'or' operator. + .Cgroup-based exclusion of processes from the scheduler ==== ---- [scheduler] isolated_cores=1 cgroup_ps_blacklist=:/daemons\b ---- The scheduler plug-in will move all processes away from core 1 except processes which belong to cgroup '/daemons'. The '\b' is a regular expression metacharacter that matches a word boundary. ---- [scheduler] isolated_cores=1 cgroup_ps_blacklist=\b8:blkio: ---- The scheduler plug-in will exclude all processes which belong to a cgroup with hierarchy-ID 8 and controller-list blkio. ==== Recent kernels moved some `sched_` and `numa_balancing_` kernel run-time parameters from `/proc/sys/kernel`, managed by the `sysctl` utility, to `debugfs`, typically mounted under `/sys/kernel/debug`. TuneD provides an abstraction mechanism for the following parameters via the scheduler plug-in: [option]`sched_min_granularity_ns`, [option]`sched_latency_ns`, [option]`sched_wakeup_granularity_ns`, [option]`sched_tunable_scaling`, [option]`sched_migration_cost_ns`, [option]`sched_nr_migrate`, [option]`numa_balancing_scan_delay_ms`, [option]`numa_balancing_scan_period_min_ms`, [option]`numa_balancing_scan_period_max_ms` and [option]`numa_balancing_scan_size_mb`. Based on the kernel used, TuneD will write the specified value to the correct location. + .Set tasks' "cache hot" value for migration decisions. ==== ---- [scheduler] sched_migration_cost_ns=500000 ---- On the old kernels, this is equivalent to: ---- [sysctl] kernel.sched_migration_cost_ns=500000 ---- that is, value `500000` will be written to `/proc/sys/kernel/sched_migration_cost_ns`. However, on more recent kernels, the value `500000` will be written to `/sys/kernel/debug/sched/migration_cost_ns`. ==== c s� t t| �j||||||||� d| _tj| _ttj�| _ |d k rh|j tj tj�| _t|j tj tj��| _ t� | _d | _i | _d| _d| _d| _tj� | _| jdd�| _d| _| jdd�| _d | _ y t � | _ W n t k r� t � | _ Y nX d S )NTz.*� r )Z command_name�irq)!�superrN r Z_has_dynamic_options�constsZCFG_DEF_DAEMON�_daemon�intZCFG_DEF_SLEEP_INTERVAL�_sleep_interval�get_boolZ CFG_DAEMONr4 ZCFG_SLEEP_INTERVALr r �_secure_boot_hint�_sched_knob_paths_cache� _ps_whitelist� _ps_blacklist�_cgroup_ps_blacklist_re�perfZcpu_map�_cpusZ _storage_key�_scheduler_storage_key� _irq_process�_irq_storage_key�_evlistr �_scheduler_utils�AttributeErrorrL ) r Zmonitor_repositoryZstorage_factoryZhardware_inventoryZdevice_matcherZdevice_matcher_udevZplugin_instance_factoryZ global_cfg� variables)� __class__r r r � s0 zSchedulerPlugin.__init__c C sT |d kr d S y t |�}W n tk r, dS X |dkr:dS t dtjtj|d�� �S )Nr � )rT � ValueError�mathZceil�log)r Z mmap_pagesZmpr r r �_calc_mmap_pages� s z SchedulerPlugin._calc_mmap_pagesc s d |_ d|_d|_d|_� jj� ji �� _t� j�dkr^t j d� � j � i � _� jj � j� t � � _d � _d� _d � _tj� fdd�|jj� D ��� _|j|_� jj|jd �}� j|�}|dkr�t jd| � d }|d k r�t |�|kr�t j d ||f � x(|jD ] }� jj|j| �|j|< �qW � j j |jjd d ��d k�rHd|_t j � |_!� j"�r |j�r y�t#j$� |_%t#j&t#j't#j(d d ddd d t#j)t#j*B d � }|j+� j,|j%d� t#j-� j,|j%�|_ |j j.|� |d k�r�|j j/� n|j j/|d� W n d|_Y nX d S )NFTr z0recovering scheduling settings from previous runc sJ g | ]B\}}|d d� dkrt |�dkr� j|dd � �� jj|�f�qS )N� zcgroup.)�len�_sanitize_cgroup_path� _variables�expand)r* �optionr )r r r � <listcomp>� s z2SchedulerPlugin._instance_init.<locals>.<listcomp>�perf_mmap_pageszKInvalid 'perf_mmap_pages' value specified: '%s', using default kernel valuezL'perf_mmap_pages' value has to be power of two, specified: '%s', using: '%d'Zruntimer �0) �type�configZtask�comm�mmapZfreqZ wakeup_eventsZ watermarkZ sample_type)Zcpus�threads)Zpages)0ra Z_has_dynamic_tuningZ_has_static_tuning�_runtime_tuning�_storager4 r^ �_scheduler_originalrl ri �info�_restore_ps_affinity�unsetr. �_cgroups_original_affinityr � _cgroup_affinity_initialized�_cgroup� collections� OrderedDict�optionsr0 �_cgroups� _schedulerrn ro rj �error�strr rV � threadingZEvent� _terminaterS r\ Z thread_mapZ_threads�evselZ TYPE_SOFTWAREZCOUNT_SW_DUMMYZ SAMPLE_TIDZ SAMPLE_CPU�openr] Zevlist�addrw )r �instanceZperf_mmap_pages_rawrr r+ r� r )r r �_instance_init� s^ z SchedulerPlugin._instance_initc C s* |j r&x |j j� D ]}tj|j� qW d S )N)ra � get_pollfdr) �closer, )r r� �fdr r r �_instance_cleanup s z!SchedulerPlugin._instance_cleanupc C s4 d t jddd d d d ddd dd d d d d d d d d d d�S )NFT�calcZfalse)�isolated_cores�cgroup_mount_point�cgroup_mount_point_init�cgroup_groups_init�cgroup_for_isolated_cores�cgroup_ps_blacklist� ps_whitelist� ps_blacklist� irq_process�default_irq_smp_affinityrr �perf_process_fork�sched_min_granularity_ns�sched_latency_ns�sched_wakeup_granularity_ns�sched_tunable_scaling�sched_migration_cost_ns�sched_nr_migrate� numa_balancing_scan_delay_ms�!numa_balancing_scan_period_min_ms�!numa_balancing_scan_period_max_ms�numa_balancing_scan_size_mb)rR ZDEF_CGROUP_MOUNT_POINT)�clsr r r �_get_config_options s, z#SchedulerPlugin._get_config_optionsc C s |d k rt |�jdd�S d S )N�.�/)r� �replace)r r r r r rm 9 s z%SchedulerPlugin._sanitize_cgroup_pathc C s> t |tj�s|}tj|�}tj|�}| j|�r:d| d }|S )N�[�])� isinstance�procfs�processZprocess_cmdline� _is_kthread)r r� r9 r r r r � _get_cmdline= s z SchedulerPlugin._get_cmdlinec C s� t j� }|j� i }x�|j� D ]�}yN| j|�}|d }|||< d|krnx&|d j� D ]}| j|�}|||< qTW W q ttfk r� } z$|jtj ks�|jtj kr�w n� W Y d d }~X q X q W |S )Nr9 rx ) r� �pidstats�reload_threadsr2 r� �keys�OSError�IOError�errno�ENOENT�ESRCH)r �ps� processes�procr r9 �er r r � get_processesG s$ z SchedulerPlugin.get_processesc C s@ | j j|�}| j j|�}| j j|�}tjd|||f � ||fS )Nz8Read scheduler policy '%s' and priority '%d' of PID '%d')rb r: r7 rF ri �debug)r r9 r � sched_strr r r r �_get_rt` s zSchedulerPlugin._get_rtc C s | j j|�}tjd|||f � yB| j j|�}| j j|�}||k sJ||kr`tjd||||f � W n4 ttfk r� } ztjd| � W Y d d }~X nX y| j j |||� W n` ttfk �r } z>t |d�r�|j t j kr�tjd| � ntjd||f � W Y d d }~X nX d S )NzBSetting scheduler policy to '%s' and priority to '%d' of PID '%d'.z9Priority for %s must be in range %d - %d. '%d' was given.z(Failed to get allowed priority range: %sr� zAFailed to set scheduling parameters of PID %d, the task vanished.z1Failed to set scheduling parameters of PID %d: %s) rb r7 ri r� rH rJ r� � SystemErrorr� r? �hasattrr� r� )r r9 r= r> r� Zprio_minZprio_maxr� r r r �_set_rth s* zSchedulerPlugin._set_rtc C s |d d t jj@ dkS )N�stat�flagsr )r� ZpidstatZ PF_KTHREAD)r r� r r r r� � s zSchedulerPlugin._is_kthreadc C s yjt j|�}|d j� rd|d d dkr8tjd| � n(| j|�rRtjd| � ntjd| � dS dS W n� ttfk r� } zF|j t j ks�|j t j kr�tjd | � d S tj d ||f � d S W Y d d }~X n8 t tfk �r } ztj d ||f � dS d }~X nX d S )Nr� �state�ZzYAffinity of zombie task with PID %d cannot be changed, the task's affinity mask is fixed.z[Affinity of kernel thread with PID %d cannot be changed, the task's affinity mask is fixed.zRAffinity of task with PID %d cannot be changed, the task's affinity mask is fixed.r r z6Failed to get task info for PID %d, the task vanished.z&Failed to get task info for PID %d: %srf ������r� )r� r� Zis_bound_to_cpuri r� r� �warnr� r� r� r� r� r� rc �KeyError)r r9 r� r� r r r �_affinity_changeable� s2 z$SchedulerPlugin._affinity_changeablec C s\ y| j | }W n( tk r6 t| j�}|| j |< Y nX |jd krX|jd krX||_||_d S )N)r{ r� r r r r )r r9 r r �paramsr r r �_store_orig_process_rt� s z&SchedulerPlugin._store_orig_process_rtc C s� d}|d kr|d kr|S y:| j |�\}}|d kr4|}| j|||� | j|||� W nt ttfk r� } zTt|d�r�|jtjkr�tj d| � || j kr�| j |= d}ntj d||f � W Y d d }~X nX |S )NTr� z=Failed to read scheduler policy of PID %d, the task vanished.FzcRefusing to set scheduler and priority of PID %d, reading original scheduling parameters failed: %s) r� r� r� r� r� r� r� r� ri r� r{ r� )r r9 r= r> �contZ prev_schedZ prev_prior� r r r �_tune_process_rt� s& z SchedulerPlugin._tune_process_rtc C s t |�d d� dkS )Nrk zcgroup.)r� )r r r r r �_is_cgroup_affinity� s z#SchedulerPlugin._is_cgroup_affinityFc C sb y| j | }W n( tk r6 t| j�}|| j |< Y nX |jd kr^|jd kr^|rX||_n||_d S )N)r{ r� r r r r )r r9 r � is_cgroupr� r r r � _store_orig_process_affinity� s z,SchedulerPlugin._store_orig_process_affinityc C sp xj| j jdtjt|�df dd�jd�D ]@}y&|jd�d dd � }|dkrP|S d S tk rf Y q(X q(W d S ) Nz%s/%s/%sr T)�no_error� z:cpuset:r rO r� )r � read_filerR ZPROCFS_MOUNT_POINTr� �split� IndexError)r r9 �lr r r r �_get_cgroup_affinity� s , z$SchedulerPlugin._get_cgroup_affinityc C sB | j |�}| j}|dkr$d||f }| jjd| t|�dd� d S )Nr� z%s/%sz%s/tasksT)r� )rm �_cgroup_mount_pointr � write_to_filer� )r r9 r �pathr r r � _set_cgroup� s zSchedulerPlugin._set_cgroupc C s, |dd � }t |t� o"t|�dk}||fS )Nrk r )r� �listrl )r r r� r r r �_parse_cgroup_affinity� s z&SchedulerPlugin._parse_cgroup_affinityc C s� d}|d kr|S yd| j |�\}}|r<| j|�}| j||� n(| j|�}|rX| j|||�}| j||� | j|||� W nt ttfk r� } zTt |d�r�|j t j kr�t j d| � || jkr�| j|= d}nt jd||f � W Y d d }~X nX |S )NTr� z5Failed to read affinity of PID %d, the task vanished.FzLRefusing to set CPU affinity of PID %d, reading original affinity failed: %s)r� r� r� � _get_affinity�_get_intersect_affinity� _set_affinityr� r� r� r� r� r� ri r� r{ r� ) r r9 r � intersectr� r� r � prev_affinityr� r r r �_tune_process_affinity� s4 z&SchedulerPlugin._tune_process_affinityc C sF | j |||�}|sd S | j||�}| s2|| jkr6d S || j| _d S )N)r� r� r{ r )r r9 r r= r> r r� r r r � _tune_process s z SchedulerPlugin._tune_processc C sf | j j|�}|d kr.|dkr.tjd| � dS y t|�}W n" tk r\ tjd| � dS X ||fS )Nr z>Invalid scheduler: %s. 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It will be ignored.)r� r � hex2cpulistri r� )r Z str_affinityr r r r �_convert_affinity+ s z!SchedulerPlugin._convert_affinityc C s6 |\}}}}}| j ||�\}}| j|�}|||||fS )N)r� r� )r �vals� rule_prior r r �regexr r r �_convert_sched_cfg8 s z"SchedulerPlugin._convert_sched_cfgc C s� d| j |f }ytj|tj� W n4 tk rT } ztjd||f � W Y d d }~X nX | jj d|df | jj d| j df dd�dd�s�tjd| � d S )Nz%s/%sz Unable to create cgroup '%s': %sz cpuset.memsT)r� z3Unable to initialize 'cpuset.mems ' for cgroup '%s') r� r) �mkdirrR �DEF_CGROUP_MODEr� ri r� r r� r� )r r r� r� r r r �_cgroup_create_group? s $z$SchedulerPlugin._cgroup_create_groupc C s@ | j d k r"| j | jkr"| j| j � x| jD ]}| j|� q*W d S )N)r� r� r� )r �cgr r r �_cgroup_initialize_groupsJ s z)SchedulerPlugin._cgroup_initialize_groupsc C s� t jd� ytj| jtj� W n0 tk rN } zt jd| � W Y d d }~X nX | j j dddddd| jg�\}}|dkr�t jd | j � d S ) Nz Initializing cgroups settingsz'Unable to create cgroup mount point: %sZmountz-tr z-oZcpusetr zUnable to mount '%s') ri r� 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s^ z&SchedulerPlugin._instance_apply_staticc C s� y | j � }W n2 ttfk r> } ztjd| � d S d }~X nX x�| jj� D ]x\}}||ksL|| |jkrlqL|jd k r�|j d k r�| j ||j|j � |j d k r�| j ||j � qL|j d k rL| j||j � qLW i | _| jj| j� d S )NzKerror unapplying tuning, cannot get information about running processes: %s)r� r� r� ri r� r{ r0 r r r r� r r� r r� rz r~ r^ )r r� r� r9 Z orig_paramsr r r r} � s& z$SchedulerPlugin._restore_ps_affinityc C s� t tj�}d}xr|dkr�|dkr�| jjd| j|df ddd�}|d krvx.|jd�D ] }| jjd | jdf |dd � qRW |d 8 }qW |dkr�tj d | � d S )N� rO r z%s/%s/%sZtasksT)r r� r� z%s/%s)r� r z(Unable to cleanup tasks from cgroup '%s')rO r# ) rT rR ZCGROUP_CLEANUP_TASKS_RETRYr r� r� r� r� ri r� )r r Zcnt�datar� r r r �_cgroup_cleanup_tasks_one� s z)SchedulerPlugin._cgroup_cleanup_tasks_onec C s@ | j d k r"| j | jkr"| j| j � x| jD ]}| j|� q*W d S )N)r� r� r% )r r� r r r �_cgroup_cleanup_tasks� s z%SchedulerPlugin._cgroup_cleanup_tasksc sp t t| �j||� | jr2|jr2|jj� |jj� | j � | j � | j � | j sV| j r^| j� | j rl| j� d S )N)rQ rN �_instance_unapply_staticrS ry r� r r! �joinr} r r& r r r r )r r� Zrollback)re r r r' � s z(SchedulerPlugin._instance_unapply_staticc C s� t jd| � d| j|df }| jj|ddd�}|dkr<dS | jj| jj|��}| jj| jj|��}d| }||kr�t jtj ||f � dS t j tj |||f � dS d S ) Nz Verifying cgroup '%s' affinityz%s/%s/%sz cpuset.cpusr T)r r� zcgroup '%s' affinityF) ri r� r� r r� �cpulist2stringZ cpulist_packr| rR �STR_VERIFY_PROFILE_VALUE_OKr� � STR_VERIFY_PROFILE_VALUE_FAIL)r r r r� �current_affinityZaffinity_descriptionr r r �_cgroup_verify_affinity_one s z+SchedulerPlugin._cgroup_verify_affinity_onec C sr t jd� d}| jd k rB| jd k rB| j| jkrB|o@| j| j| j�}x*| jj� D ] }|oh| j|d |d �}qNW |S )Nz Veryfying cgroups affinitiesTr r )ri r� r r� r� r- r0 )r r� r� r r r �_cgroup_verify_affinity s z'SchedulerPlugin._cgroup_verify_affinityc s$ t t| �j|||�}| j� }|o"|S )N)rQ rN �_instance_verify_staticr. )r r� �ignore_missingZdevicesZret1Zret2)re r r r/ s z'SchedulerPlugin._instance_verify_staticc C s� y| j |�}W n^ ttfk rl } z>|jtjks<|jtjkrLtjd| � ntjd||f � d S d }~X nX | j j |j ||�}|d k r�|| j kr�tjd||t |�f � |\}}} | j||||| � | jj| j| j � d S )Nz3Failed to get cmdline of PID %d, the task vanished.z#Failed to get cmdline of PID %d: %sz-tuning new process '%s' with PID '%d' by '%s')r� r� r� r� r� r� ri r� r� r Z re_lookupr r{ r� r� rz r r^ ) r r� r9 r% r r� �vr= r> r r r r �_add_pid$ s$ zSchedulerPlugin._add_pidc C s6 || j kr2| j |= tjd| � | jj| j| j � d S )Nz)removed PID %d from the rollback database)r{ ri r� rz r r^ )r r� r9 r r r � _remove_pid9 s zSchedulerPlugin._remove_pidc C s� | j j|j�}tj� }|jj� }x|D ]}|j|� q&W x�|jj � s�t |j| j d ��dkr:|jj � r:d}x�|r�d}xt| j D ]j}|jj |�}|r~d}|jtjks�| jr�|jtjkr�| j|t|j�|� q~|jtjkr~| j|t|j�� q~W qnW q:W d S )Ni� r TF)r Zre_lookup_compiler �select�pollra r� �registerr� Zis_setrl rU r] Z read_on_cpurt r\ Z RECORD_COMM�_perf_process_fork_valueZ RECORD_FORKr2 rT �tidZ RECORD_EXITr3 ) r r� r% r5 Zfdsr� Z read_eventsZcpuZeventr r r r @ s& $ z SchedulerPlugin._thread_coder� )� per_devicec C s: |rd S |r6|d k r6dj dd� tjdt|��D ��| _d S )N�|c S s g | ] }d | �qS )z(%s)r )r* r1 r r r rq _ s z8SchedulerPlugin._cgroup_ps_blacklist.<locals>.<listcomp>z(?<!\\);)r( r r� r� r[ )r �enablingr �verifyr0 r r r �_cgroup_ps_blacklistY s z$SchedulerPlugin._cgroup_ps_blacklistr� c C s: |rd S |r6|d k r6dj dd� tjdt|��D ��| _d S )Nr: c S s g | ] }d | �qS )z(%s)r )r* r1 r r r rq g s z1SchedulerPlugin._ps_whitelist.<locals>.<listcomp>z(?<!\\);)r( r r� r� rY )r r; r r< r0 r r r rY a s z SchedulerPlugin._ps_whitelistr� c C s: |rd S |r6|d k r6dj dd� tjdt|��D ��| _d S )Nr: c S s g | ] }d | �qS )z(%s)r )r* r1 r r r rq o s z1SchedulerPlugin._ps_blacklist.<locals>.<listcomp>z(?<!\\);)r( r r� r� rZ )r r; r r< r0 r r r rZ i s z SchedulerPlugin._ps_blacklistr� c C s* |rd S |r&|d k r&| j j|�dk| _d S )Nr )r rV r_ )r r; r r< r0 r r r r_ q s z SchedulerPlugin._irq_processr� c C s6 |rd S |r2|d k r2|dkr$|| _ n| jj|�| _ d S )Nr� �ignore)r� r> )� _default_irq_smp_affinity_valuer �cpulist_unpack)r r; r r< r0 r r r �_default_irq_smp_affinityy s z)SchedulerPlugin._default_irq_smp_affinityr� c C s* |rd S |r&|d k r&| j j|�dk| _d S )Nr )r rV r7 )r r; r r< r0 r r r �_perf_process_fork� s z"SchedulerPlugin._perf_process_forkc C s" | j j|�}tjd||f � |S )Nz Read affinity '%s' of PID %d)rb rA ri r� )r r9 �resr r r r� � s z SchedulerPlugin._get_affinityc C s� t jd||f � y| jj||� dS ttfk r� } zXt|d�r`|jtjkr`t jd| � n.| j |�}|dksz|d kr�t j d|||f � dS d }~X nX d S ) Nz'Setting CPU affinity of PID %d to '%s'.Tr� z4Failed to set affinity of PID %d, the task vanished.r rf z,Failed to set affinity of PID %d to '%s': %sFr� ) ri r� rb rC r� r� r� r� r� r� r� )r r9 r r� rC r r r r� � s z SchedulerPlugin._set_affinityc C s" t |�jt |��}|r t|�S |S )N)r � intersectionr� )r Z affinity1Z affinity2Z affinity3Zaffr r r r� � s z'SchedulerPlugin._get_intersect_affinityc s> � fdd�|D �}� j dkr.� fdd�|D �}� jdkrJ� fdd�|D �}tdd� |D ��}x�|D ]�}y� j|| �}W nb ttfk r� } zB|jtjks�|jtjkr�t j d| � nt j d||f � wbW Y d d }~X nX � j ||d d �} | s�qb|� j k�r |� j | _| rbd || krb� j|| d j� |d � qbW d S ) Nc s( g | ] }t j� j� j|��d k r|�qS )N)r r rY �_get_stat_comm)r* r1 )r r r rq � s z9SchedulerPlugin._set_all_obj_affinity.<locals>.<listcomp>rO c s( g | ] }t j� j� j|��d kr|�qS )N)r r rZ rE )r* r1 )r r r rq � s c s( g | ] }t j� j� j|��d kr|�qS )N)r r r[ �_get_stat_cgroup)r* r1 )r r r rq � s c S s g | ]}|j |f�qS r )r9 )r* r1 r r r rq � s z3Failed to get cmdline of PID %d, the task vanished.zARefusing to set affinity of PID %d, failed to get its cmdline: %sT)r� rx )rZ r[ r. r� r� r� r� r� r� ri r� r� r� r{ r �_set_all_obj_affinityr2 ) r Zobjsr rx ZpslZpsdr9 r r� r� r )r r rG � s6 z%SchedulerPlugin._set_all_obj_affinityc C s( y|d S t ttfk r" dS X d S )NZcgroupsrO )r� r� r� )r r& r r r rF � s z SchedulerPlugin._get_stat_cgroupc C s, y |d d S t ttfk r& dS X d S )Nr� rv rO )r� r� r� )r r& r r r rE � s z SchedulerPlugin._get_stat_commc C s` y&t j� }|j� | j|j� |d� W n4 ttfk rZ } ztjd| � W Y d d }~X nX d S )NFzIerror applying tuning, cannot get information about running processes: %s) r� r� r� rG r2 r� r� ri r� )r r r� r� r r r �_set_ps_affinity� s z SchedulerPlugin._set_ps_affinityc C s� yJ| j j|�}tjd||f � d| }t|d��}|j|� W d Q R X dS ttfk r� } zLt|d�r�|j t j kr�| r�tjd| � d S tj d|||f � d S W Y d d }~X nX d S ) Nz&Setting SMP affinity of IRQ %s to '%s'z/proc/irq/%s/smp_affinity�wr r� z/Setting SMP affinity of IRQ %s is not supportedrf z0Failed to set SMP affinity of IRQ %s to '%s': %sr r� r� ) r � cpulist2hexri r� r� �writer� r� r� r� ZEIOr� )r rP r Z restoring� affinity_hex�filenamer# r� r r r �_set_irq_affinity� s" z!SchedulerPlugin._set_irq_affinityc C s| y>| j j|�}tjd| � tdd��}|j|� W d Q R X W n8 ttfk rv } ztjd||f � W Y d d }~X nX d S )Nz(Setting default SMP IRQ affinity to '%s'z /proc/irq/default_smp_affinityrI z2Failed to set default SMP IRQ affinity to '%s': %s) r rJ ri r� r� rK r� r� r� )r r rL r# r� r r r �_set_default_irq_affinity� s z)SchedulerPlugin._set_default_irq_affinityc C s" t � }tj� }x�|j� D ]�}y"|| d }tjd||f � W n tk rT wY nX | j|||�}t|�t|�krvq| j ||d�}|dkr�||j |< q|d kr|j j |� qW | j jd�}| j j|�}| jdkr�| j|||�}n| jdkr�| j}| jdk�r| j|� ||_| jj| j|� d S ) Nr z Read affinity of IRQ '%s': '%s'Fr rf z /proc/irq/default_smp_affinityr� r> r� )r r� � interruptsr� ri r� r� r� r rN r r �appendr r� r� r? rO r rz r` ) r r � irq_originalr rP r� r rC Zprev_affinity_hexr r r �_set_all_irq_affinity s6 z%SchedulerPlugin._set_all_irq_affinityc C sn | j j| jd �}|d kr d S x$|jj� D ]\}}| j||d� q(W | jdkr\|j}| j|� | j j | j� d S )NTr> ) rz r4 r` r r0 rN r? r rO r~ )r rR rP r r r r �_restore_all_irq_affinity) s z)SchedulerPlugin._restore_all_irq_affinityc C sF t |�jt |��}|r,tjtj||f � ntjtj|||f � |S )N)r �issubsetri r| rR r* r� r+ )r �irq_description�correct_affinityr, rC r r r �_verify_irq_affinity4 s z$SchedulerPlugin._verify_irq_affinityc C s� | j j| jd �}tj� }d}x�|j� D ]�}||jkrR|rRd| }tjt j | � q&y<|| d }tj d||f � d| } | j | ||�s�d}W q& t k r� w&Y q&X q&W | jjd�} | jj| �}| jdkr�| j d || jd kr�|n| j� r�d}|S ) NTz-IRQ %s does not support changing SMP affinityr z#Read SMP affinity of IRQ '%s': '%s'zSMP affinity of IRQ %sFz /proc/irq/default_smp_affinityr> zdefault IRQ SMP affinityr� )rz r4 r` r� rP r� r ri r| rR Z STR_VERIFY_PROFILE_VALUE_MISSINGr� rX r� r r� r� r? ) r rW r0 rR r rC rP � descriptionr, rV Zcurrent_affinity_hexr r r �_verify_all_irq_affinity@ s8 z(SchedulerPlugin._verify_all_irq_affinityr� � )r9 r c C s� d }d | _ |d k rrt| jj|��}t| j�}|j|�rRt|| �}| jj|�| _ n | jj| j�}tj d||f � |sz|r�|d kr�d S |r�| j r�| j ||�S dS |r�| j r�| j � d| j } n|} | j| � | j r�| j|� n| j r�| j� d S )NzJInvalid isolated_cores specified, '%s' does not match available cores '%s'Tz cgroup.%s)r r r r@ r] rU r� r) ri r� r_ rZ r� r rH rS rT ) r r; r r< r0 r �isolatedZpresentZstr_cpusZ ps_affinityr r r �_isolated_cores_ s6 z SchedulerPlugin._isolated_coresc C s� d|||f }| j j|�}|r"|S d||f }tjj|�sv|dkrPd||f }nd|||f }d| }| jd krvd| _|| j |< |S )Nz%s_%s_%sz/proc/sys/kernel/%s_%srO z%s/%sz%s/%s/%sz/sys/kernel/debug/%sT)rX r4 r) r� �existsrW )r �prefix� namespace�knobr r� r r r �_get_sched_knob_path� s z$SchedulerPlugin._get_sched_knob_pathc C sJ | j j| j|||�d d�}|d krFtjd| � | jrFtjd� d| _|S )N)r zError reading '%s'zUThis may not work with Secure Boot or kernel_lockdown (this hint is logged only once)F)r r� rb ri r� rW )r r_ r` ra r$ r r r �_get_sched_knob� s z SchedulerPlugin._get_sched_knobc C sN |d kr d S |sJ| j j| j|||�||r0tjgndd�sJtjd||f � |S )NF)r� z Error writing value '%s' to '%s')r r� rb r� r� ri r� )r r_ r` ra r �sim�remover r r �_set_sched_knob� s z SchedulerPlugin._set_sched_knobr� c C s | j ddd�S )NrO r= �min_granularity_ns)rc )r r r r � _get_sched_min_granularity_ns� s z-SchedulerPlugin._get_sched_min_granularity_nsc C s | j ddd|||�S )NrO r= rg )rf )r r rd re r r r � _set_sched_min_granularity_ns� s z-SchedulerPlugin._set_sched_min_granularity_nsr� c C s | j ddd�S )NrO r= � latency_ns)rc )r r r r �_get_sched_latency_ns� s z%SchedulerPlugin._get_sched_latency_nsc C s | j ddd|||�S )NrO r= rj )rf )r r rd re r r r �_set_sched_latency_ns� s z%SchedulerPlugin._set_sched_latency_nsr� c C s | j ddd�S )NrO r= �wakeup_granularity_ns)rc )r r r r � _get_sched_wakeup_granularity_ns� s z0SchedulerPlugin._get_sched_wakeup_granularity_nsc C s | j ddd|||�S )NrO r= rm )rf )r r rd re r r r � _set_sched_wakeup_granularity_ns� s z0SchedulerPlugin._set_sched_wakeup_granularity_nsr� c C s | j ddd�S )NrO r= �tunable_scaling)rc )r r r r �_get_sched_tunable_scaling� s z*SchedulerPlugin._get_sched_tunable_scalingc C s | j ddd|||�S )NrO r= rp )rf )r r rd re r r r �_set_sched_tunable_scaling� s z*SchedulerPlugin._set_sched_tunable_scalingr� c C s | j ddd�S )NrO r= �migration_cost_ns)rc )r r r r � _get_sched_migration_cost_ns� s z,SchedulerPlugin._get_sched_migration_cost_nsc C s | j ddd|||�S )NrO r= rs )rf )r r rd re r r r � _set_sched_migration_cost_ns� s z,SchedulerPlugin._set_sched_migration_cost_nsr� c C s | j ddd�S )NrO r= � nr_migrate)rc )r r r r �_get_sched_nr_migrate� s z%SchedulerPlugin._get_sched_nr_migratec C s | j ddd|||�S )NrO r= rv )rf )r r rd re r r r �_set_sched_nr_migrate� s z%SchedulerPlugin._set_sched_nr_migrater� c C s | j ddd�S )Nr= �numa_balancing� scan_delay_ms)rc )r r r r �!_get_numa_balancing_scan_delay_ms� s z1SchedulerPlugin._get_numa_balancing_scan_delay_msc C s | j ddd|||�S )Nr= ry rz )rf )r r rd re r r r �!_set_numa_balancing_scan_delay_ms� s z1SchedulerPlugin._set_numa_balancing_scan_delay_msr� c C s | j ddd�S )Nr= ry �scan_period_min_ms)rc )r r r r �&_get_numa_balancing_scan_period_min_ms� s z6SchedulerPlugin._get_numa_balancing_scan_period_min_msc C s | j ddd|||�S )Nr= ry r} )rf )r r rd re r r r �&_set_numa_balancing_scan_period_min_ms� s z6SchedulerPlugin._set_numa_balancing_scan_period_min_msr� c C s | j ddd�S )Nr= ry �scan_period_max_ms)rc )r r r r �&_get_numa_balancing_scan_period_max_ms� s z6SchedulerPlugin._get_numa_balancing_scan_period_max_msc C s | j ddd|||�S )Nr= ry r� )rf )r r rd re r r r �&_set_numa_balancing_scan_period_max_ms� s z6SchedulerPlugin._set_numa_balancing_scan_period_max_msr� c C s | j ddd�S )Nr= ry � scan_size_mb)rc )r r r r � _get_numa_balancing_scan_size_mb� s z0SchedulerPlugin._get_numa_balancing_scan_size_mbc C s | j ddd|||�S )Nr= ry r� )rf )r r rd re r r r � _set_numa_balancing_scan_size_mb� s z0SchedulerPlugin._set_numa_balancing_scan_size_mb)F)F)F)F)F)br r r rK r rj r� r� � classmethodr� rm r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r r r r r r r} r% r& rR Z ROLLBACK_SOFTr' r- r. r/ r2 r3 r Zcommand_customr= rY rZ r_ rA rB r� r� r� rG rF rE rH rN rO rS rT rX rZ r] rb rc rf Z command_getrh Z command_setri rk rl rn ro rq rr rt ru rw rx r{ r| r~ r r� r� r� r� � __classcell__r r )re r rN � s� ( ? < " $ rN ) rO r Z decoratorsZ tuned.logsZtunedr � subprocessr� r\ r4 Z tuned.constsrR r� Ztuned.utils.commandsr r� r) r� rh r rc rM Zlogsr4 ri �objectr r r rL ZPluginrN r r r r �<module> s0 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