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<?php
namespace MediaWiki\Extension\AbuseFilter;
use MediaWiki\Config\ServiceOptions;
use MediaWiki\Title\Title;
use Psr\Log\LoggerInterface;
use Wikimedia\ObjectCache\BagOStuff;
use Wikimedia\Stats\IBufferingStatsdDataFactory;
use Wikimedia\WRStats\LocalEntityKey;
use Wikimedia\WRStats\WRStatsFactory;
/**
* This class is used to create, store, and retrieve profiling information for single filters and
* groups of filters.
*
* @internal
*/
class FilterProfiler {
public const SERVICE_NAME = 'AbuseFilterFilterProfiler';
public const CONSTRUCTOR_OPTIONS = [
'AbuseFilterConditionLimit',
'AbuseFilterSlowFilterRuntimeLimit',
];
/**
* How long to keep profiling data in cache (in seconds)
*/
private const STATS_STORAGE_PERIOD = BagOStuff::TTL_DAY;
/** The stats time bucket size */
private const STATS_TIME_STEP = self::STATS_STORAGE_PERIOD / 12;
/** The WRStats spec common to all metrics */
private const STATS_TEMPLATE = [
'sequences' => [ [
'timeStep' => self::STATS_TIME_STEP,
'expiry' => self::STATS_STORAGE_PERIOD,
] ],
];
private const KEY_PREFIX = 'abusefilter-profile';
/** @var WRStatsFactory */
private $statsFactory;
/** @var ServiceOptions */
private $options;
/** @var string */
private $localWikiID;
/** @var IBufferingStatsdDataFactory */
private $statsd;
/** @var LoggerInterface */
private $logger;
/** @var array */
private $statsSpecs;
/**
* @param WRStatsFactory $statsFactory
* @param ServiceOptions $options
* @param string $localWikiID
* @param IBufferingStatsdDataFactory $statsd
* @param LoggerInterface $logger
*/
public function __construct(
WRStatsFactory $statsFactory,
ServiceOptions $options,
string $localWikiID,
IBufferingStatsdDataFactory $statsd,
LoggerInterface $logger
) {
$options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS );
$this->statsFactory = $statsFactory;
$this->options = $options;
$this->localWikiID = $localWikiID;
$this->statsd = $statsd;
$this->logger = $logger;
$this->statsSpecs = [
'count' => self::STATS_TEMPLATE,
'total' => self::STATS_TEMPLATE,
'overflow' => self::STATS_TEMPLATE,
'matches' => self::STATS_TEMPLATE,
'total-time' => [ 'resolution' => 1e-3 ] + self::STATS_TEMPLATE,
'total-cond' => self::STATS_TEMPLATE
];
}
/**
* @param int $filter
*/
public function resetFilterProfile( int $filter ): void {
$writer = $this->statsFactory->createWriter(
$this->statsSpecs,
self::KEY_PREFIX
);
$writer->resetAll( [ $this->filterProfileKey( $filter ) ] );
}
/**
* Retrieve per-filter statistics.
*
* @param int $filter
* @return array See self::NULL_FILTER_PROFILE for the returned array structure
* @phan-return array{count:int,matches:int,total-time:float,total-cond:int}
*/
public function getFilterProfile( int $filter ): array {
$reader = $this->statsFactory->createReader(
$this->statsSpecs,
self::KEY_PREFIX
);
return $reader->total( $reader->getRates(
[ 'count', 'matches', 'total-time', 'total-cond' ],
$this->filterProfileKey( $filter ),
$reader->latest( self::STATS_STORAGE_PERIOD )
) );
}
/**
* Retrieve per-group statistics.
*
* @param string $group
* @return array See self::NULL_GROUP_PROFILE for the returned array structure
* @phan-return array{total:int,overflow:int,total-time:float,total-cond:int,matches:int}
*/
public function getGroupProfile( string $group ): array {
$reader = $this->statsFactory->createReader(
$this->statsSpecs,
self::KEY_PREFIX
);
return $reader->total( $reader->getRates(
[ 'total', 'overflow', 'total-time', 'total-cond', 'matches' ],
$this->filterProfileGroupKey( $group ),
$reader->latest( self::STATS_STORAGE_PERIOD )
) );
}
/**
* Record per-filter profiling data
*
* @param int $filter
* @param float $time Time taken, in milliseconds
* @param int $conds
* @param bool $matched
*/
private function recordProfilingResult( int $filter, float $time, int $conds, bool $matched ): void {
$key = $this->filterProfileKey( $filter );
$writer = $this->statsFactory->createWriter(
$this->statsSpecs,
self::KEY_PREFIX
);
$writer->incr( 'count', $key );
if ( $matched ) {
$writer->incr( 'matches', $key );
}
$writer->incr( 'total-time', $key, $time );
$writer->incr( 'total-cond', $key, $conds );
$writer->flush();
}
/**
* Update global statistics
*
* @param string $group
* @param int $condsUsed The amount of used conditions
* @param float $totalTime Time taken, in milliseconds
* @param bool $anyMatch Whether at least one filter matched the action
*/
public function recordStats( string $group, int $condsUsed, float $totalTime, bool $anyMatch ): void {
$writer = $this->statsFactory->createWriter(
$this->statsSpecs,
self::KEY_PREFIX
);
$key = $this->filterProfileGroupKey( $group );
$writer->incr( 'total', $key );
$writer->incr( 'total-time', $key, $totalTime );
$writer->incr( 'total-cond', $key, $condsUsed );
// Increment overflow counter, if our condition limit overflowed
if ( $condsUsed > $this->options->get( 'AbuseFilterConditionLimit' ) ) {
$writer->incr( 'overflow', $key );
}
// Increment counter by 1 if there was at least one match
if ( $anyMatch ) {
$writer->incr( 'matches', $key );
}
$writer->flush();
}
/**
* Record runtime profiling data for all filters together
*
* @param int $totalFilters
* @param int $totalConditions
* @param float $runtime
* @codeCoverageIgnore
*/
public function recordRuntimeProfilingResult( int $totalFilters, int $totalConditions, float $runtime ): void {
$keyPrefix = 'abusefilter.runtime-profile.' . $this->localWikiID . '.';
$this->statsd->timing( $keyPrefix . 'runtime', $runtime );
$this->statsd->timing( $keyPrefix . 'total_filters', $totalFilters );
$this->statsd->timing( $keyPrefix . 'total_conditions', $totalConditions );
}
/**
* Record per-filter profiling, for all filters
*
* @param Title $title
* @param array $data Profiling data
* @phan-param array<string,array{time:float,conds:int,result:bool}> $data
*/
public function recordPerFilterProfiling( Title $title, array $data ): void {
$slowFilterThreshold = $this->options->get( 'AbuseFilterSlowFilterRuntimeLimit' );
foreach ( $data as $filterName => $params ) {
[ $filterID, $global ] = GlobalNameUtils::splitGlobalName( $filterName );
// @todo Maybe add a parameter to recordProfilingResult to record global filters
// data separately (in the foreign wiki)
if ( !$global ) {
$this->recordProfilingResult(
$filterID,
$params['time'],
$params['conds'],
$params['result']
);
}
if ( $params['time'] > $slowFilterThreshold ) {
$this->recordSlowFilter(
$title,
$filterName,
$params['time'],
$params['conds'],
$params['result'],
$global
);
}
}
}
/**
* Logs slow filter's runtime data for later analysis
*
* @param Title $title
* @param string $filterId
* @param float $runtime
* @param int $totalConditions
* @param bool $matched
* @param bool $global
*/
private function recordSlowFilter(
Title $title,
string $filterId,
float $runtime,
int $totalConditions,
bool $matched,
bool $global
): void {
$this->logger->info(
'Edit filter {filter_id} on {wiki} is taking longer than expected',
[
'wiki' => $this->localWikiID,
'filter_id' => $filterId,
'title' => $title->getPrefixedText(),
'runtime' => $runtime,
'matched' => $matched,
'total_conditions' => $totalConditions,
'global' => $global
]
);
}
/**
* Get the WRStats entity key used to store per-filter profiling data.
*
* @param int $filter
* @return LocalEntityKey
*/
private function filterProfileKey( int $filter ): LocalEntityKey {
return new LocalEntityKey( [ 'filter', (string)$filter ] );
}
/**
* WRStats entity key used to store overall profiling data for rule groups
*
* @param string $group
* @return LocalEntityKey
*/
private function filterProfileGroupKey( string $group ): LocalEntityKey {
return new LocalEntityKey( [ 'group', $group ] );
}
}