scheduling

const (
	// Metric name for free bots.
	MEASUREMENT_FREE_BOT_COUNT = "free_bot_count"

	// FILTER_* are used as the value of the "filter" key in metrics; we record counts for all free
	// bots and all free bots after allocating pending tasks to bots.
	FILTER_ALL_FREE_BOTS       = "all_free_bots"
	FILTER_MINUS_PENDING_TASKS = "minus_pending_tasks"

	// Metric name for pending tasks.
	MEASUREMENT_PENDING_TASK_COUNT = "pending_swarming_task_count"
)

const (
	// Manually-forced jobs have high priority.
	CANDIDATE_SCORE_FORCE_RUN = 100.0

	// Try jobs have high priority, equal to building at HEAD when we're
	// 5 commits behind.
	CANDIDATE_SCORE_TRY_JOB = 10.0

	// When retrying a try job task that has failed, prioritize the retry
	// lower than tryjob tasks that haven't run yet.
	CANDIDATE_SCORE_TRY_JOB_RETRY_MULTIPLIER = 0.75

	// When bisecting or retrying a task that failed or had a mishap, add a bonus
	// to the raw score.
	//
	// A value of 0.75 means that a retry scores higher than a bisecting a
	// successful task with a blamelist of 2 commits, but lower than testing new
	// commits or bisecting successful tasks with blamelist of 3 or
	// more. Bisecting a failure with a blamelist of 2 commits scores the same as
	// bisecting a successful task with a blamelist of 4 commits.
	CANDIDATE_SCORE_FAILURE_OR_MISHAP_BONUS = 0.75

	// MAX_BLAMELIST_COMMITS is the maximum number of commits which are
	// allowed in a task blamelist before we stop tracing commit history.
	MAX_BLAMELIST_COMMITS = 500

	// Measurement name for task candidate counts by dimension set.
	MEASUREMENT_TASK_CANDIDATE_COUNT = "task_candidate_count"

	NUM_TOP_CANDIDATES = 50

	// To avoid errors resulting from DB transaction size limits, we
	// restrict the number of tasks triggered per TaskSpec (we insert tasks
	// into the DB in chunks by TaskSpec) to half of the DB transaction size
	// limit (since we may need to update an existing whose blamelist was
	// split by the new task).
	SCHEDULING_LIMIT_PER_TASK_SPEC = firestore.MAX_TRANSACTION_DOCS / 2

	GCS_MAIN_LOOP_DIAGNOSTICS_DIR = "MainLoop"
	GCS_DIAGNOSTICS_WRITE_TIMEOUT = 60 * time.Second
)