Clemens Ladisch 13882a82ee firewire: optimize iso queueing by setting wake only after the last packet ... When queueing iso packets, the run time is dominated by the two MMIO accesses that set the DMA context's wake bit. Because most drivers submit packets in batches, we can save much time by removing all but the last wakeup. The internal kernel API is changed to require a call to fw_iso_context_queue_flush() after a batch of queued packets. The user space API does not change, so one call to FW_CDEV_IOC_QUEUE_ISO must specify multiple packets to take advantage of this optimization. In my measurements, this patch reduces the time needed to queue fifty skip packets from userspace to one sixth on a 2.5 GHz CPU, or to one third at 800 MHz. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>		2011-05-10 22:53:45 +02:00
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firedtv-avc.c	firewire: octlet AT payloads can be stack-allocated	2011-05-10 22:53:44 +02:00
firedtv-ci.c	llseek: automatically add .llseek fop	2010-10-15 15:53:27 +02:00
firedtv-dvb.c	[media] firedtv: drop obsolete backend abstraction	2011-03-21 20:32:21 -03:00
firedtv-fe.c	[media] firedtv: drop obsolete backend abstraction	2011-03-21 20:32:21 -03:00
firedtv-fw.c	firewire: optimize iso queueing by setting wake only after the last packet	2011-05-10 22:53:45 +02:00
firedtv-rc.c	[media] firedtv: fix remote control with newer Xorg evdev	2011-01-19 11:45:59 -02:00
firedtv.h	[media] firedtv: drop obsolete backend abstraction	2011-03-21 20:32:21 -03:00
Kconfig	[media] firedtv: remove obsolete ieee1394 backend code	2011-03-21 20:32:12 -03:00
Makefile	[media] firedtv: remove obsolete ieee1394 backend code	2011-03-21 20:32:12 -03:00