On 03.04.2013 20:32, John W. Linville wrote: > They are in wireless-next... Ah, thanks! -Jussi > > 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(-) >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
