Ejemplos de spa_has_pending_synctask en C++ (Cpp)

Ejemplo n.º 1

Archivo: vdev_queue.c Proyecto: akatrevorjay/zfs

static int
vdev_queue_max_async_writes(spa_t *spa)
{
	int writes;
	uint64_t dirty = 0;
	dsl_pool_t *dp = spa_get_dsl(spa);
	uint64_t min_bytes = zfs_dirty_data_max *
	    zfs_vdev_async_write_active_min_dirty_percent / 100;
	uint64_t max_bytes = zfs_dirty_data_max *
	    zfs_vdev_async_write_active_max_dirty_percent / 100;

	/*
	 * Async writes may occur before the assignment of the spa's
	 * dsl_pool_t if a self-healing zio is issued prior to the
	 * completion of dmu_objset_open_impl().
	 */
	if (dp == NULL)
		return (zfs_vdev_async_write_max_active);

	/*
	 * Sync tasks correspond to interactive user actions. To reduce the
	 * execution time of those actions we push data out as fast as possible.
	 */
	if (spa_has_pending_synctask(spa))
		return (zfs_vdev_async_write_max_active);

	dirty = dp->dp_dirty_total;
	if (dirty < min_bytes)
		return (zfs_vdev_async_write_min_active);
	if (dirty > max_bytes)
		return (zfs_vdev_async_write_max_active);

	/*
	 * linear interpolation:
	 * slope = (max_writes - min_writes) / (max_bytes - min_bytes)
	 * move right by min_bytes
	 * move up by min_writes
	 */
	writes = (dirty - min_bytes) *
	    (zfs_vdev_async_write_max_active -
	    zfs_vdev_async_write_min_active) /
	    (max_bytes - min_bytes) +
	    zfs_vdev_async_write_min_active;
	ASSERT3U(writes, >=, zfs_vdev_async_write_min_active);
	ASSERT3U(writes, <=, zfs_vdev_async_write_max_active);
	return (writes);
}

Ejemplo n.º 2

Archivo: vdev_queue.c Proyecto: gvsurenderreddy/illumos-gate

static int
vdev_queue_max_async_writes(spa_t *spa)
{
	int writes;
	uint64_t dirty = spa->spa_dsl_pool->dp_dirty_total;
	uint64_t min_bytes = zfs_dirty_data_max *
	    zfs_vdev_async_write_active_min_dirty_percent / 100;
	uint64_t max_bytes = zfs_dirty_data_max *
	    zfs_vdev_async_write_active_max_dirty_percent / 100;

	/*
	 * Sync tasks correspond to interactive user actions. To reduce the
	 * execution time of those actions we push data out as fast as possible.
	 */
	if (spa_has_pending_synctask(spa)) {
		return (zfs_vdev_async_write_max_active);
	}

	if (dirty < min_bytes)
		return (zfs_vdev_async_write_min_active);
	if (dirty > max_bytes)
		return (zfs_vdev_async_write_max_active);

	/*
	 * linear interpolation:
	 * slope = (max_writes - min_writes) / (max_bytes - min_bytes)
	 * move right by min_bytes
	 * move up by min_writes
	 */
	writes = (dirty - min_bytes) *
	    (zfs_vdev_async_write_max_active -
	    zfs_vdev_async_write_min_active) /
	    (max_bytes - min_bytes) +
	    zfs_vdev_async_write_min_active;
	ASSERT3U(writes, >=, zfs_vdev_async_write_min_active);
	ASSERT3U(writes, <=, zfs_vdev_async_write_max_active);
	return (writes);
}