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Directory lookups show up in profiling. The queue files are responsible for a large proportion of file-related system calls in udev coldplug. Instead of creating a file for each event, append their details to a log file. The file is periodically rebuilt (garbage-collected) to prevent it from growing indefinitely. This single queue file replaces both the queue directory and the uevent_seqnum file. On desktop systems the file tends not to grow beyond one page. So it should also save a small amount of memory in tmpfs. Tests on a running EeePC indicate average savings of 5% *udevd* cpu time as measured by oprofile. __link_path_walk is reduced from 1.5% to 1.3%. It is not completely clear where the rest of the gains come from. In tests running ~400 events, the queue file is rebuilt about 5 times. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
74 lines
1.8 KiB
Plaintext
74 lines
1.8 KiB
Plaintext
udev_new
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udev_ref
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udev_unref
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udev_set_log_fn
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udev_get_log_priority
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udev_set_log_priority
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udev_get_userdata
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udev_set_userdata
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udev_get_sys_path
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udev_get_dev_path
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udev_list_entry_get_next
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udev_list_entry_get_by_name
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udev_list_entry_get_name
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udev_list_entry_get_value
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udev_device_new_from_syspath
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udev_device_new_from_devnum
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udev_device_new_from_subsystem_sysname
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udev_device_get_parent
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udev_device_get_parent_with_subsystem_devtype
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udev_device_ref
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udev_device_unref
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udev_device_get_udev
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udev_device_get_syspath
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udev_device_get_devpath
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udev_device_get_devnode
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udev_device_get_sysname
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udev_device_get_sysnum
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udev_device_get_subsystem
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udev_device_get_devtype
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udev_device_get_devlinks_list_entry
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udev_device_get_properties_list_entry
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udev_device_get_property_value
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udev_device_get_action
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udev_device_get_driver
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udev_device_get_devnum
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udev_device_get_seqnum
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udev_device_get_sysattr_value
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udev_enumerate_new
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udev_enumerate_ref
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udev_enumerate_unref
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udev_enumerate_get_udev
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udev_enumerate_get_list_entry
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udev_enumerate_add_match_subsystem
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udev_enumerate_add_nomatch_subsystem
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udev_enumerate_add_match_sysattr
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udev_enumerate_add_nomatch_sysattr
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udev_enumerate_add_match_property
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udev_enumerate_scan_devices
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udev_enumerate_scan_subsystems
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udev_enumerate_add_syspath
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udev_monitor_new_from_socket
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udev_monitor_new_from_netlink
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udev_monitor_enable_receiving
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udev_monitor_ref
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udev_monitor_unref
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udev_monitor_get_udev
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udev_monitor_get_fd
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udev_monitor_receive_device
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udev_monitor_filter_add_match_subsystem_devtype
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udev_monitor_filter_update
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udev_monitor_filter_remove
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udev_queue_new
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udev_queue_ref
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udev_queue_unref
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udev_queue_get_udev
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udev_queue_get_kernel_seqnum
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udev_queue_get_udev_seqnum
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udev_queue_get_udev_is_active
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udev_queue_get_queue_is_empty
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udev_queue_get_seqnum_is_finished
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udev_queue_get_seqnum_sequence_is_finished
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udev_queue_get_queued_list_entry
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udev_queue_get_failed_list_entry
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