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021bff9179
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Sarah Sharp 021bff9179 USB: xhci: Performance - move functions that find ep ring. 
I've been using perf to measure the top symbols while transferring 1GB of data
on a USB 3.0 drive with dd.  This is using the raw disk with /dev/sdb, with a
block size of 1K.

During performance testing, the top symbol was xhci_triad_to_transfer_ring(), a
function that should return immediately if streams are not enabled for an
endpoint.  It turned out that the functions to find the endpoint ring was
defined in xhci-mem.c and used in xhci-ring.c and xhci-hcd.c.  I moved a copy of
xhci_triad_to_transfer_ring() and xhci_urb_to_transfer_ring() into xhci-ring.c
and declared them static.  I also made a static version of
xhci_urb_to_transfer_ring() in xhci.c.

This improved throughput on a 1GB read of the raw disk with dd from
186MB/s to 195MB/s, and perf reported sampling the xhci_triad_to_transfer_ring()
0.06% of the time, rather than 9.26% of the time.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-10 14:35:44 -07:00
..
accessibility
acpi Merge branch 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2010-08-07 17:08:30 -07:00
amba ARM: AMBA: Add pclk support to AMBA bus infrastructure 2010-07-31 13:07:27 +01:00
ata Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2010-08-07 12:42:58 -07:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-08-09 21:05:52 -07:00
auxdisplay
base drivers/base/node.c: reduce stack usage of node_read_meminfo() 2010-08-09 20:45:02 -07:00
block Merge branch 'virtio' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2010-08-05 13:49:37 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
cdrom
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-08-09 21:05:52 -07:00
clocksource
connector
cpufreq [CPUFREQ] fix brace coding style issue. 2010-08-03 13:47:05 -04:00
cpuidle cpuidle: extend cpuidle and menu governor to handle dynamic states 2010-08-09 20:45:04 -07:00
crypto Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-05 15:57:35 -07:00
dca
dio
dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2010-08-09 21:00:07 -07:00
edac amd64_edac: Minor formatting fix 2010-08-04 11:16:01 +02:00
eisa
firewire Merge firewire branches to be released post v2.6.35 2010-08-02 10:09:04 +02:00
firmware edd: fix possible memory leak in edd_init() error path 2010-08-09 20:45:09 -07:00
gpio Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-05 15:57:35 -07:00
gpu drm: fix fallouts from slow-work -> wq conversion 2010-08-09 12:18:44 +02:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-08-04 15:23:49 -07:00
hwmon hwmon: f71882fg: add support for the Fintek F71808E 2010-08-09 20:45:10 -07:00
i2c Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-05 15:57:35 -07:00
ide tx493xide: use min_t() macro instead of min() 2010-08-09 03:17:55 -07:00
idle Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2010-08-04 11:13:36 -07:00
ieee1394 Merge firewire branches to be released post v2.6.35 2010-08-02 10:09:04 +02:00
ieee802154
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2010-08-07 17:08:02 -07:00
input Revert "Input: appletouch - fix integer overflow issue" 2010-08-09 13:48:08 +10:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-08-09 21:05:52 -07:00
leds leds: Remove owner field from attribute initialization in bd2802 driver 2010-08-05 13:53:35 -07:00
lguest
macintosh Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-08-06 13:25:43 -07:00
mca
md
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-08-07 17:09:24 -07:00
memstick
message Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-08-04 15:31:02 -07:00
mfd
misc hmc6352: add driver for the HMC6352 compass 2010-08-09 20:45:10 -07:00
mmc Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
mtd Merge git://git.infradead.org/mtd-2.6 2010-08-10 11:49:21 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-08-09 21:05:52 -07:00
nubus
of of/platform: Register of_platform_drivers with an "of:" prefix 2010-08-01 01:44:18 -06:00
oprofile
parisc Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-08-04 15:31:02 -07:00
parport Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
pci Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2010-08-09 21:00:07 -07:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
platform ips driver: make it less chatty 2010-08-03 11:55:15 -04:00
pnp
power POWER: Add JZ4740 battery driver. 2010-08-05 13:26:20 +01:00
pps
ps3
rapidio
regulator regulator: Remove owner field from attribute initialization in regulator core driver 2010-08-05 13:53:35 -07:00
rtc Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus 2010-08-05 08:53:20 -07:00
s390 s390: remove WARN_ON for misc_deregister() failures 2010-08-09 20:45:06 -07:00
sbus Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-05 15:57:35 -07:00
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
serial Merge branch 'rs485fix' of git://www.jni.nu/cris 2010-08-09 21:04:23 -07:00
sfi
sh
sn
spi of/address: Clean up function declarations 2010-08-01 01:42:42 -06:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2010-08-06 12:25:06 -07:00
staging USB: convert usb_hcd bitfields into atomic flags 2010-08-10 14:35:37 -07:00
tc
telephony pcmcia: do not use io_req_t when calling pcmcia_request_io() 2010-08-03 09:04:11 +02:00
thermal
uio uio: Remove IRQF_DISABLED flag from uio_cif.c 2010-08-05 13:53:33 -07:00
usb USB: xhci: Performance - move functions that find ep ring. 2010-08-10 14:35:44 -07:00
uwb
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-08-04 11:47:58 -07:00
video drivers/video/w100fb.c: ignore void return value / fix build failure 2010-08-09 20:44:53 -07:00
virtio
vlynq
w1
watchdog Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-08-05 15:57:35 -07:00
xen Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-08-06 13:25:43 -07:00
zorro
Kconfig
Makefile