willy tarreau 71f6d1b31f net: mvneta: replace Tx timer with a real interrupt ... Right now the mvneta driver doesn't handle Tx IRQ, and relies on two mechanisms to flush Tx descriptors : a flush at the end of mvneta_tx() and a timer. If a burst of packets is emitted faster than the device can send them, then the queue is stopped until next wake-up of the timer 10ms later. This causes jerky output traffic with bursts and pauses, making it difficult to reach line rate with very few streams. A test on UDP traffic shows that it's not possible to go beyond 134 Mbps / 12 kpps of outgoing traffic with 1500-bytes IP packets. Routed traffic tends to observe pauses as well if the traffic is bursty, making it even burstier after the wake-up. It seems that this feature was inherited from the original driver but nothing there mentions any reason for not using the interrupt instead, which the chip supports. Thus, this patch enables Tx interrupts and removes the timer. It does the two at once because it's not really possible to make the two mechanisms coexist, so a split patch doesn't make sense. First tests performed on a Mirabox (Armada 370) show that less CPU seems to be used when sending traffic. One reason might be that we now call the mvneta_tx_done_gbe() with a mask indicating which queues have been done instead of looping over all of them. The same UDP test above now happily reaches 987 Mbps / 87.7 kpps. Single-stream TCP traffic can now more easily reach line rate. HTTP transfers of 1 MB objects over a single connection went from 730 to 840 Mbps. It is even possible to go significantly higher (>900 Mbps) by tweaking tcp_tso_win_divisor. Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Gregory CLEMENT <gregory.clement@free-electrons.com> Cc: Arnaud Ebalard <arno@natisbad.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Arnaud Ebalard <arno@natisbad.org> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-01-16 15:15:42 -08:00
..
accessibility	…
acpi	Merge branches 'acpi-battery' and 'pm-cpufreq'	2014-01-06 22:49:08 +01:00
amba	DMA-API: amba: get rid of separate dma_mask	2013-10-31 14:48:38 +00:00
ata	Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata	2014-01-09 09:08:23 +08:00
atm	atm: slight optimization of addr compare	2013-12-26 13:31:34 -05:00
auxdisplay	…
base	Revert "cpufreq: suspend governors on system suspend/hibernate"	2013-12-08 01:04:17 +01:00
bcma	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem	2014-01-10 10:59:40 -05:00
block	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2013-12-24 10:06:03 -08:00
bluetooth	Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next	2014-01-08 13:44:29 -05:00
bus	Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm	2013-11-14 08:51:29 +09:00
cdrom	…
char	ACPI / TPM: fix memory leak when walking ACPI namespace	2014-01-05 15:54:21 +01:00
clk	clk: clk-divider: fix divisor > 255 bug	2014-01-08 08:33:12 -08:00
clocksource	clocksource: dw_apb_timer_of: Fix support for dts binding "snps,dw-apb-timer"	2013-12-10 19:49:18 +01:00
connector	connector: improved unaligned access error fix	2013-11-14 17:19:20 -05:00
cpufreq	intel_pstate: Add X86_FEATURE_APERFMPERF to cpu match parameters.	2014-01-06 22:16:14 +01:00
cpuidle	ARM/cpuidle: remove __init tag from Calxeda cpuidle probe function	2013-12-30 11:55:20 +01:00
crypto	crypto: ixp4xx - Fix kernel compile error	2014-01-01 14:06:23 +08:00
dca	…
devfreq	Merge branch 'pm-devfreq'	2013-11-07 19:24:20 +01:00
dio	…
dma	drivers/dma/ioat/dma.c: check DMA mapping error in ioat_dma_self_test()	2014-01-02 14:40:30 -08:00
edac	sb_edac: Shut up compiler warning when EDAC_DEBUG is enabled	2013-11-30 12:26:36 +01:00
eisa	…
extcon	extcon: remove freed groups caused the panic or warning in unregister flow	2013-11-26 15:17:23 +09:00
firewire	firewire: sbp2: bring back WRITE SAME support	2013-12-15 16:32:32 +01:00
firmware	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-12-29 13:35:04 -08:00
fmc	…
gpio	GPIO fixes for the v3.13 development cycle:	2013-12-17 11:47:40 -08:00
gpu	Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/nouveau/linux-2.6 into drm-fixes	2014-01-08 17:57:45 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2013-12-13 13:21:28 -08:00
hsi	…
hv	…
hwmon	hwmon fixes for 3.13-rc4	2013-12-12 11:05:19 -08:00
hwspinlock	…
i2c	i2c: imx: Check the return value from clk_prepare_enable()	2013-12-12 22:48:22 +01:00
ide	More ACPI and power management updates for 3.13-rc1	2013-11-20 13:25:04 -08:00
idle	intel_idle: close avn_cstates array with correct marker	2014-01-10 03:06:06 +01:00
iio	iio:adc:ad7887 Fix channel reported endianness from cpu to big endian	2013-12-17 20:37:14 +00:00
infiniband	net: replace macros net_random and net_srandom with direct calls to prandom	2014-01-14 15:15:25 -08:00
input	Input: allocate absinfo data when setting ABS capability	2013-12-31 10:53:19 -08:00
iommu	iommu/arm-smmu: fix error return code in arm_smmu_device_dt_probe()	2013-12-06 16:44:25 +00:00
ipack	…
irqchip	Renesas ARM based SoC fixes for v3.13	2013-12-20 11:28:30 -08:00
isdn	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2014-01-06 17:37:45 -05:00
leds	leds: lp5521/5523: Remove duplicate mutex	2014-01-10 14:48:07 -08:00
lguest	x86, asmlinkage, lguest: Pass in globals into assembler statement	2013-11-07 12:13:05 +10:30
macintosh	powerpc/windfarm: Fix XServe G5 fan control Makefile issue	2013-11-27 11:35:47 +11:00
mailbox	…
md	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2013-12-24 10:06:03 -08:00
media	media: dvb_core: slight optimization of addr compare	2013-12-26 13:31:34 -05:00
memory	…
memstick	tree-wide: use reinit_completion instead of INIT_COMPLETION	2013-11-15 09:32:21 +09:00
message	drivers/message/i2o/driver.c: add missing destroy_workqueue() on error in i2o_driver_register()	2013-11-13 12:09:26 +09:00
mfd	This is the 2nd MFD pull request for 3.13	2014-01-11 06:23:57 +07:00
misc	Char/Misc driver fixes for 3.13-rc3	2013-12-08 18:47:25 -08:00
mmc	mmc: omap: Fix I2C dependency and make driver usable with device tree	2013-11-26 15:51:16 -08:00
mtd	Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm	2014-01-06 12:20:45 +11:00
net	net: mvneta: replace Tx timer with a real interrupt	2014-01-16 15:15:42 -08:00
nfc	nfc: Fix FSF address in file headers	2013-12-11 10:56:21 -05:00
ntb	NTB driver bug fixes to address a missed call to pci_enable_msix,	2013-11-26 11:15:12 -08:00
nubus	…
of	phylib: Add of_phy_attach	2014-01-13 14:29:49 -08:00
oprofile	…
parisc	…
parport	Kconfig cleanups for v3.13	2013-11-15 14:05:15 -08:00
pci	Merge branches 'acpi-pci-pm' and 'acpi-pci-hotplug'	2013-12-31 22:03:37 +01:00
pcmcia	DeviceTree updates for 3.13. This is a bit larger pull request than	2013-11-12 16:52:17 +09:00
phy	phy,exynos: Add dependency on HAS_IOMEM	2014-01-15 14:51:22 -08:00
pinctrl	Merge branches 'powercap' and 'acpi-lpss' with new device IDs	2013-12-27 00:43:24 +01:00
platform	sony-laptop: do not scribble keyboard backlight registers on resume	2013-11-26 13:03:36 +09:00
pnp	PNP: fix restoring devices after hibernation	2013-12-05 02:01:55 +01:00
power	power,goldfish: Add dependency on HAS_IOMEM	2014-01-15 14:51:22 -08:00
powercap	powercap / RAPL: add support for ValleyView Soc	2013-12-22 01:27:51 +01:00
pps	drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr	2013-11-13 12:09:35 +09:00
ps3	…
ptp	ptp_pch: Add dependency on HAS_IOMEM	2014-01-15 14:51:22 -08:00
pwm	pwm: samsung: Fix kernel warning while unexporting a channel	2013-11-01 11:17:57 +01:00
rapidio	…
regulator	mfd: s2mps11: Fix build after regmap field rename in sec-core.c	2013-12-16 11:30:39 +00:00
remoteproc	…
reset	…
rpmsg	…
rtc	mfd/rtc: s5m: fix register updating by adding regmap for RTC	2013-12-12 18:19:26 -08:00
s390	qeth: bridgeport support - address notifications	2014-01-15 14:48:01 -08:00
sbus	…
scsi	qla2xxx: Fix scsi_host leak on qlt_lport_register callback failure	2013-12-19 14:50:17 -08:00
sfi	…
sh	…
sn	…
spi	Merge remote-tracking branches 'spi/fix/bcm2835', 'spi/fix/bcm63xx', 'spi/fix/mpc512x-psc', 'spi/fix/mxs', 'spi/fix/pxa2xx', 'spi/fix/qspi', 'spi/fix/rspi' and 'spi/fix/txx9' into spi-linus	2013-11-28 11:31:35 +00:00
ssb	ssb: fix sparse warnings in driver_chipcommon_sflash.c	2014-01-03 15:37:01 -05:00
staging	staging,lpc32xx_adc: Add dependency on HAS_IOMEM	2014-01-15 14:51:22 -08:00
target	target: Remove extra percpu_ref_init	2013-12-19 14:49:54 -08:00
tc	…
thermal	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-11-19 15:50:47 -08:00
tty	tty: xuartps: Properly guard sysrq specific code	2013-12-17 16:02:25 -08:00
uio	uio: we cannot mmap unaligned page contents	2013-12-02 11:50:37 -08:00
usb	usb: ohci-at91: fix irq and iomem resource retrieval	2013-12-17 13:22:36 -08:00
uwb	Driver Core / sysfs patches for 3.13-rc1	2013-11-07 11:42:15 +09:00
vfio	…
vhost	vhost: remove the dead branch	2013-12-06 15:22:05 -05:00
video	Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2013-12-09 19:21:39 -08:00
virt	…
virtio	virtio_balloon: update_balloon_size(): update correct field	2013-12-05 13:12:39 +10:30
vlynq	…
vme	…
w1	drivers/w1/masters/w1-gpio.c: use dev_get_platdata()	2013-11-15 09:32:21 +09:00
watchdog	sc1200_wdt: Fix oops	2013-12-10 08:48:15 +01:00
xen	Bug-fixes:	2013-12-20 09:34:54 -08:00
zorro	…
Kconfig	ACPI and power management updates for 3.13-rc1	2013-11-14 13:41:48 +09:00
Makefile	ACPI and power management updates for 3.13-rc1	2013-11-14 13:41:48 +09:00