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13882a82ee
linux/drivers
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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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acpi ACPI / PM: Avoid infinite recurrence while registering power resources 2011-04-26 11:33:18 +02:00
amba PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS 2011-04-11 22:54:42 +02:00
ata libata: ahci_start_engine compliant to AHCI spec 2011-04-24 11:35:40 -04:00
atm Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
auxdisplay
base PM / Wakeup: Fix initialization of wakeup-related device sysfs files 2011-04-26 11:33:09 +02:00
block libceph: fix ceph_osdc_alloc_request error checks 2011-05-03 09:28:13 -07:00
bluetooth Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
cdrom
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2011-04-21 09:58:42 -07:00
clk CLKDEV: Fix clkdev return value for NULL clk case 2011-04-30 10:14:08 +01:00
clocksource
connector connector: fix skb double free in cn_rx_skb() 2011-04-12 14:38:57 -07:00
cpufreq
cpuidle
crypto
dca
dio
dma Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6 2011-04-11 15:44:38 -07:00
edac amd64_edac: Erratum #637 workaround 2011-04-26 16:18:56 +02:00
eisa
firewire firewire: optimize iso queueing by setting wake only after the last packet 2011-05-10 22:53:45 +02:00
firmware
gpio Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6 2011-04-11 15:44:38 -07:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 2011-05-09 16:59:51 -07:00
hid Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
hwmon hwmon: (twl4030-madc-hwmon) Return proper error if hwmon_device_register fails 2011-05-01 09:06:35 -07:00
hwspinlock
i2c i2c-parport: Fix adapter list handling 2011-05-01 18:18:49 +02:00
ide ide: unexport DISK_EVENT_MEDIA_CHANGE for ide-gd and ide-cd 2011-04-21 19:43:59 +02:00
idle
ieee802154
infiniband Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-05-02 20:26:32 -07:00
isdn
leds leds/leds-regulator.c: fix handling of already enabled regulators 2011-04-14 16:06:54 -07:00
lguest
macintosh Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
mca
md raid5: fix build error, sector_t usage 2011-04-21 10:00:00 -07:00
media firewire: optimize iso queueing by setting wake only after the last packet 2011-05-10 22:53:45 +02:00
memstick
message
mfd omap:usb: add regulator support for EHCI 2011-05-02 15:29:26 +03:00
misc drivers/misc/sgi-gru/grufile.c: fix the wrong members of gru_chip 2011-04-14 16:06:55 -07:00
mmc mmc: sdhci: Check mrq != NULL in sdhci_tasklet_finish 2011-04-27 19:16:50 -04:00
mtd Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
net Revert: veth: remove unneeded ifname code from veth_newlink() 2011-05-02 15:54:31 -07:00
nfc
nubus
of
oprofile
parisc
parport parport_pc.c: correctly release the requested region for the IT887x 2011-04-19 16:36:24 -07:00
pci Merge git://git.infradead.org/iommu-2.6 2011-04-21 09:56:35 -07:00
pcmcia Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
platform eeepc-laptop: Use ACPI handle to identify rfkill port 2011-05-09 10:48:47 -04:00
pnp
power
pps
ps3
rapidio RapidIO/mpc85xx: fix possible mport registration problems 2011-04-14 16:06:56 -07:00
regulator
rtc rtc: max8925: Call dev_set_drvdata before rtc_device_register 2011-04-28 11:16:21 +02:00
s390 [S390] irqstats: fix counting of pfault, dasd diag and virtio irqs 2011-04-29 10:42:25 +02:00
sbus
scsi [SCSI] fix oops in scsi_run_queue() 2011-05-03 15:30:00 -05:00
sfi
sh
sn
spi Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6 2011-04-11 15:44:38 -07:00
ssb
staging Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-05-04 14:23:41 -07:00
target
tc
telephony
thermal
tty tty/n_gsm: fix bug in CRC calculation for gsm1 mode 2011-04-19 16:38:50 -07:00
uio
usb xHCI: Clear PLC in xhci_bus_resume() 2011-05-03 11:14:32 -07:00
uwb
vhost
video ARM: pxafb: Fix access to nonexistent member of pxafb_info 2011-04-12 23:07:42 +08:00
virtio virtio_pci: Prevent double-free of pci regions after device hot-unplug 2011-04-21 22:57:00 +09:30
vlynq
w1
watchdog watchdog: iTCO_wdt: TCO Watchdog patch for Intel Panther Point PCH 2011-04-26 12:50:44 +00:00
xen PM: Add missing syscore_suspend() and syscore_resume() calls 2011-04-20 00:36:11 +02:00
zorro
Kconfig
Makefile