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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amdtp.c	firewire: optimize iso queueing by setting wake only after the last packet	2011-05-10 22:53:45 +02:00
amdtp.h	ALSA: firewire-lib, firewire-speakers: handle packet queueing errors	2011-03-15 08:42:30 +01:00
cmp.c	firewire: octlet AT payloads can be stack-allocated	2011-05-10 22:53:44 +02:00
cmp.h
fcp.c	ALSA: firewire - msleep needs delay.h	2011-03-16 07:47:33 +01:00
fcp.h
iso-resources.c	firewire: octlet AT payloads can be stack-allocated	2011-05-10 22:53:44 +02:00
iso-resources.h	firewire: octlet AT payloads can be stack-allocated	2011-05-10 22:53:44 +02:00
Kconfig
lib.c
lib.h
Makefile
packets-buffer.c
packets-buffer.h
speakers.c	ALSA: firewire-speakers: fix hang when unplugging a running device	2011-03-30 08:56:57 +02:00