They are in wireless-next...
commit 657e27656dfb3a99e81c99df6e78e770d7fe0d48
Author: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Date: Sun Mar 17 11:59:29 2013 +0200
rtlwifi: usb: add NET_IP_ALIGN padding to RX skb when needed
Add proper alignment at first packet copy, to avoid extra copies made later
in networking stack.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
commit 29bb7013a53d8fc43f79f39d22a15ba8d3e77d9b
Author: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Date: Sun Mar 17 11:59:24 2013 +0200
rtlwifi: usb: defer rx processing to tasklet
Move processing of received packets to tasklet from hard-irq context.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
commit d7d0f081c48951018133cac38c8c0796f37db727
Author: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Date: Sun Mar 17 11:59:18 2013 +0200
rtlwifi: usb: remove extra skb copy on RX path
RX path has extra copying of packets, that can be avoided.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
commit 872de8ff04922e4ad95c5af39131ae9fbefe6ac5
Author: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Date: Sun Mar 17 11:59:13 2013 +0200
rtlwifi: usb: use usb_alloc_coherent for RX buffers
Use dedicated DMA coherent buffers for RX urbs, to avoid allocation of large
skbuffs in hard-irq context and improve performance.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@xxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
On Wed, Apr 03, 2013 at 08:16:20PM +0300, Jussi Kivilinna wrote:
> Any comments on this patchset?
>
> On 17.03.2013 11:59, Jussi Kivilinna wrote:
> > Patchset improves RX path handling in rtlwifi/usb.c by:
> > - change to use preallocated DMA coherent URB buffers.
> > - kill unnessasary skbuff copies.
> > - defer RX processing to tasklet.
> > - add proper alignment of skbuff early on.
> >
> > With this patchset IRQ CPU usage drops from 37% to 25% on ARM system with
> > 1Ghz Cortex-A8, when doing large transfer with rtl8192cu. Tranfer speed
> > appears to be slightly improved too, from 29Mbit to 31Mbit.
> >
> > ---
> >
> > Jussi Kivilinna (4):
> > rtlwifi: usb: use usb_alloc_coherent for RX buffers
> > rtlwifi: usb: remove extra skb copy on RX path
> > rtlwifi: usb: defer rx processing to tasklet
> > rtlwifi: usb: add NET_IP_ALIGN padding to RX skb when needed
> >
> >
> > drivers/net/wireless/rtlwifi/rtl8192cu/trx.c | 2
> > drivers/net/wireless/rtlwifi/usb.c | 220 ++++++++++++++++++--------
> > drivers/net/wireless/rtlwifi/usb.h | 5 -
> > 3 files changed, 156 insertions(+), 71 deletions(-)
> > --
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> >
>
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