From: Jussi Kivilinna <jussi.kivilinna@iki.fi>
To: linux-wireless@vger.kernel.org
Cc: Chaoming Li <chaoming_li@realsil.com.cn>,
"John W. Linville" <linville@tuxdriver.com>,
Larry Finger <Larry.Finger@lwfinger.net>
Subject: Re: [PATCH 0/4] rtlwifi: usb: improve RX performance and lower CPU usage
Date: Wed, 03 Apr 2013 20:16:20 +0300 [thread overview]
Message-ID: <515C63E4.7020506@iki.fi> (raw)
In-Reply-To: <20130317095831.24983.97107.stgit@localhost6.localdomain6>
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
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> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
next prev parent reply other threads:[~2013-04-03 17:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-17 9:59 [PATCH 0/4] rtlwifi: usb: improve RX performance and lower CPU usage Jussi Kivilinna
2013-03-17 9:59 ` [PATCH 1/4] rtlwifi: usb: use usb_alloc_coherent for RX buffers Jussi Kivilinna
2013-03-17 9:59 ` [PATCH 2/4] rtlwifi: usb: remove extra skb copy on RX path Jussi Kivilinna
2013-03-17 9:59 ` [PATCH 3/4] rtlwifi: usb: defer rx processing to tasklet Jussi Kivilinna
2013-03-17 9:59 ` [PATCH 4/4] rtlwifi: usb: add NET_IP_ALIGN padding to RX skb when needed Jussi Kivilinna
2013-04-03 17:16 ` Jussi Kivilinna [this message]
2013-04-03 17:32 ` [PATCH 0/4] rtlwifi: usb: improve RX performance and lower CPU usage John W. Linville
2013-04-03 19:19 ` Jussi Kivilinna
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