Re: [ath9k-devel] how to open an existing net_device wlan0
I have looked into the code given in ./drivers/net files where the net_devices are initialized with the help of init_modules. Most of them are like the one given on the following link: http://forum.kernelnewbies.org/read.php?12,951,951,quote=1 But should I do the same? because I only want to open the already initialized and registered net_device... and change its settings... Any kind of suggestions are really appreciated! Thanks again --- On Thu, 5/12/11, Serene Gud serene_...@yahoo.co.in wrote: From: Serene Gud serene_...@yahoo.co.in Subject: [ath9k-devel] how to open an existing net_device wlan0 To: ath9k ath9k-devel@lists.ath9k.org Date: Thursday, May 12, 2011, 7:27 PM Hi all, First of all I would like to thank everyone for their replies. Most of the information that I receive proves useful. I had no experience of working with the ath9k or the kernel code but now it seems that I have progressed quite a bit. I am able to do most of the changes that I wanted to, but some Though I am able to initialize net_device structure from ieee80211_sub_if_data input in the present files like iface.c, main.c and mlme.c in ./net/mac80211 in the kernel code. But i want to shift my functionality to a separate module so that I can just insert the module and run my function. Please help me with the following: I want to use the net_device information. I guess the net_devices get registered at the boot up time, which makes me think that even my wireless card would get initialized. So, all I want to do is: open up my wireless card net_device so that I can access its parameters. Kindly suggest as to how this can be implemented. Thanks! -Inline Attachment Follows- ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] How to initialize net_device structure type
--- On Thu, 4/28/11, Mohammed Shafi shafi.wirel...@gmail.com wrote: On Thu, Apr 28, 2011 at 8:43 PM, Serene Gud serene_...@yahoo.co.in wrote: Hi all, I am trying to make some function calls in net/mac80211/main.c which involve the net_device struct as one parameter, but I am unable to pass any arguments for it. Can anybody suggest me how to initialize struct net_Device *dev? may be iface.c ? I am not sure Hi all, I am still unable to initialize the net_device structure. Also, now i doubt if it is possible to make a call to the functions defined in cfg.c (net/mac80211/cfg.c). All thefunctions in there were declared 'static'; so I removed the static keyword so that I could make a call to the function in main.c (net/mac80211/main.c) but now I am wondering if it is possible to do this or I am just trying something which cannot be done. Thanks for the help! ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] How to initialize net_device structure type
--- On Mon, 5/9/11, Serene Gud serene_...@yahoo.co.in wrote: On Thu, Apr 28, 2011 at 8:43 PM, Serene Gud serene_...@yahoo.co.in wrote: Hi all, I am trying to make some function calls in net/mac80211/main.c which involve the net_device struct as one parameter, but I am unable to pass any arguments for it. Can anybody suggest me how to initialize struct net_Device *dev? may be iface.c ? I am not sure Hi all, I am still unable to initialize the net_device structure. Also, now i doubt if it is possible to make a call to the functions defined in cfg.c (net/mac80211/cfg.c). All thefunctions in there were declared 'static'; so I removed the static keyword so that I could make a call to the function in main.c (net/mac80211/main.c) but now I am wondering if it is possible to do this or I am just trying something which cannot be done. Thanks for the help! Is it possible to do: dev-name=wlan0; where dev is an instance of struct net_device (struct net_device *dev;) ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
[ath9k-devel] Error messgaes at boot up
Hi all, The following are the changes that I have made to the kernel code: in net/mac80211/cfg.c: I removed the key word 'static' from the function ieee80211_set_channel in net/mac80211/ieee80211_i.h: I added the prototype for the function ieee80211_set_channel; /* start*/ int ieee80211_set_channel(struct wiphy *wiphy, struct net_device *netdev, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type); /* end*/ in net/mac80211/main.c: Inside the ieee80211_hw_config function; I made a call to the function in the following way: /* start*/ struct ieee80211_sub_if_data *sdata=NULL; struct wiphy *wiphy; struct net_device *netdev; bool done; wiphy=local-hw.wiphy; netdev = alloc_netdev_mq(sizeof(*sdata) + local-hw.vif_data_size, wlan%d, ether_setup, local-hw.queues); chan=local-oper_channel; channel_type=local-hw.conf.channel_type; done = ieee80211_set_channel(wiphy,netdev,chan,channel_type); if(!done) printk(successful call to set_channel!!!\n); /* end */ When I do the 'make' there is no error. But when I reboot the system, it does not start and gives some errors that are difficult to understand... What am I doing wrong? Please suggest, Thanks! ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
[ath9k-devel] How to initialize net_device structure type
Hi all, I am trying to make some function calls in net/mac80211/main.c which involve the net_device struct as one parameter, but I am unable to pass any arguments for it. Can anybody suggest me how to initialize struct net_Device *dev? Thanks, -Serene ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
[ath9k-devel] How to exercise the CSA capability on my AP?
Hi all, I have found the following code for the station node http://marc.info/?l=linux-wirelessm=123121452014298w=4 But I do not understand how to exercise this CSA, as I have added this code to the Station but then how will the AP switch channel and let the station know that it too has to do the same? What is the code for the AP for CSA functionality. Thank you all. ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
[ath9k-devel] which kernel version has CSA (802.11h) code in mac80211
Hi all, My kernel is 2.6.38.2 but I am unable to find the CSA (802.11h) in my kernel. Can you please suggest which kernels it is present in? Thanks! -Serene ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
Thank you AdrianI'll try to find that particular code segment. --- On Mon, 4/11/11, Adrian Chadd adr...@freebsd.org wrote: From: Adrian Chadd adr...@freebsd.org Subject: Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k To: Sujith m.suj...@gmail.com Cc: Serene Gud serene_...@yahoo.co.in, ath9k ath9k-devel@lists.ath9k.org Date: Monday, April 11, 2011, 10:26 PM On 12 April 2011 11:09, Sujith m.suj...@gmail.com wrote: Adrian Chadd wrote: There's actually something in 802.11h that handles switching channels. Does mac80211 handle sending/receiving CSA? Yep. Cool. Serene, see if you can find the code that handles CSA. This is where the AP makes the decision to change channel and informs all associated stations about the new details. The stations then try re-associating to the new channel. That may do exactly what you're after! Adrian Thank you Adrian! I'll try to find that particular code segment. ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
--- On Mon, 4/11/11, Larry Vaden va...@texoma.net wrote: On Mon, Apr 11, 2011 at 10:26 PM, Adrian Chadd adr...@freebsd.org wrote: On 12 April 2011 11:09, Sujith m.suj...@gmail.com wrote: Adrian Chadd wrote: There's actually something in 802.11h that handles switching channels. Does mac80211 handle sending/receiving CSA? Yep. Cool. Serene, see if you can find the code that handles CSA. This is where the AP makes the decision to change channel and informs all associated stations about the new details. The stations then try re-associating to the new channel. That may do exactly what you're after! Adrian This sounds exactly like what Ubiquiti calls AirSelect, with the following parms: Enable AirSelect: Frequency List: Hop Interval: miliseconds Announce Count: ___ I tried that but it just didnt work on my machine --Serene ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
--- On Mon, 4/11/11, Sujith m.suj...@gmail.com wrote: Adrian Chadd wrote: There's actually something in 802.11h that handles switching channels. Does mac80211 handle sending/receiving CSA? Yep. Sujith Sujith, Can you please throw some more light and suggest me as to how do I go about it. I have gone through the code in the following files: /net/mac80211/mlme.c and also I found out that: brcm/include/proto/802.11.h contains some information about csa; the four elements: channel_mode, regulatory class, new channel number and channel switch count. Also, can you please tell me if all these options are by default enabled. Thank you so much! -Serene ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
--- On Tue, 4/12/11, Serene Gud serene_...@yahoo.co.in wrote: From: Serene Gud serene_...@yahoo.co.in Subject: Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k To: Adrian Chadd adr...@freebsd.org, Sujith m.suj...@gmail.com Cc: ath9k ath9k-devel@lists.ath9k.org Date: Tuesday, April 12, 2011, 3:33 PM --- On Mon, 4/11/11, Sujith m.suj...@gmail.com wrote: Adrian Chadd wrote: There's actually something in 802.11h that handles switching channels. Does mac80211 handle sending/receiving CSA? Yep. Sujith Sujith, Can you please throw some more light and suggest me as to how do I go about it. I have gone through the code in the following files: /net/mac80211/mlme.c and also I found out that: brcm/include/proto/802.11.h contains some information about csa; the four elements: channel_mode, regulatory class, new channel number and channel switch count. Also, can you please tell me if all these options are by default enabled. Thank you so much! -Serene Anybody else who knows the above information. Please come up... Thanks! -Inline Attachment Follows- ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
--- On Mon, 4/11/11, Mohammed Shafi shafi.at...@gmail.com wrote: From: Mohammed Shafi shafi.at...@gmail.com Subject: Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k To: Serene Gud serene_...@yahoo.co.in Cc: ath9k ath9k-devel@lists.ath9k.org Date: Monday, April 11, 2011, 9:49 AM On Mon, Apr 11, 2011 at 3:16 AM, Serene Gud serene_...@yahoo.co.in wrote: Hi all, I am able to print out the present operating frequency from the ath9k/main.c file in dmesg and if I change the frequency using iwconfig, the output of of dmesg shows that the frequency has been changed. As far as I could figure out struct ieee80211_channel is defined in ./include/net/cfg80211.h which defines one element as center_freq. But what I do not know is that which file has the code that is affected by the iwconfig wlan0 channel # command because struct ieee80211_channel is used in may files in ./net/mac80211 ./net/wireless and ./drivers/net/wireless/ath/ath9k folders mainly. *driver in main.c see ath_set_channel which is called by ath9k_config (this is called by mac80211 callback .config) *then look at ieee80211_set_channel in mac80211 * look at wext-* files (complex) If anybody knows, kindly share... Thanks! ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel Yes, I am printing the value of operating frequency from ath_set_channel in ath9k/main.c and it comes up in the dmesg every time I change the value with iwconfig. Thanks a lot for the telling me about ieee80211_set_channel in mac80211 ! ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
I M using linux kernel downloaded from kernel.org instead of compat-wireless.
But I was able to find tthe following:
./include/net/cfg80211.h:int cfg80211_wext_giwname
./include/net/cfg80211.h:int cfg80211_wext_siwmode
./include/net/cfg80211.h:int cfg80211_wext_giwmode
./include/net/cfg80211.h:int cfg80211_wext_siwscan
./include/net/cfg80211.h:int cfg80211_wext_giwscan
./include/net/cfg80211.h:int cfg80211_wext_siwmlme
./include/net/cfg80211.h:int cfg80211_wext_giwrange
./include/net/cfg80211.h:int cfg80211_wext_siwgenie
Not sure of how to use them 8-|
--- On Mon, 4/11/11, Mohammed Shafi shafi.at...@gmail.com wrote:
From: Mohammed Shafi
shafi.at...@gmail.com
Subject: Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
To: Serene Gud serene_...@yahoo.co.in
Date: Monday, April 11, 2011, 9:53 AM
also wext-core.c
static const struct iw_ioctl_description standard_ioctl[] = {
[IW_IOCTL_IDX(SIOCSIWCOMMIT)] = {
On Mon, Apr 11, 2011 at 8:21 PM, Mohammed Shafi shafi.at...@gmail.com wrote:
in wext-compat.c
static const iw_handler cfg80211_handlers[] = {
[IW_IOCTL_IDX(SIOCGIWNAME)] = (iw_handler) cfg80211_wext_giwname,
[IW_IOCTL_IDX(SIOCSIWFREQ)] = (iw_handler) cfg80211_wext_siwfreq,
[IW_IOCTL_IDX(SIOCGIWFREQ)] = (iw_handler) cfg80211_wext_giwfreq,
[IW_IOCTL_IDX(SIOCSIWMODE)] = (iw_handler) cfg80211_wext_siwmode,
[IW_IOCTL_IDX(SIOCGIWMODE)] = (iw_handler) cfg80211_wext_giwmode,
[IW_IOCTL_IDX(SIOCGIWRANGE)] = (iw_handler) cfg80211_wext_giw
On Mon, Apr 11, 2011 at 8:19 PM, Mohammed Shafi shafi.at...@gmail.com wrote:
On Mon, Apr 11, 2011 at 3:16 AM, Serene Gud serene_...@yahoo.co.in wrote:
Hi all,
I am able to print out the present operating frequency from the ath9k/main.c
file in dmesg and if I change the frequency using iwconfig, the output of of
dmesg shows that the frequency has been changed. As far as I could figure out
struct ieee80211_channel is defined in ./include/net/cfg80211.h which defines
one element as center_freq. But what I do not know is that which file has the
code that is affected by the iwconfig wlan0 channel # command because struct
ieee80211_channel is used in may files in ./net/mac80211 ./net/wireless and
./drivers/net/wireless/ath/ath9k folders mainly.
*driver in main.c see ath_set_channel which is called by ath9k_config (this is
called by mac80211 callback .config)
*then look at ieee80211_set_channel in mac80211
* look at wext-* files (complex)
If anybody knows, kindly share...
Thanks!
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Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k
--- On Mon, 4/11/11, Serene Gud serene_...@yahoo.co.in wrote: From: Serene Gud serene_...@yahoo.co.in Subject: Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k To: Mohammed Shafi shafi.at...@gmail.com Cc: ath9k ath9k-devel@lists.ath9k.org Date: Monday, April 11, 2011, 11:03 AM --- On Mon, 4/11/11, Mohammed Shafi shafi.at...@gmail.com wrote: From: Mohammed Shafi shafi.at...@gmail.com Subject: Re: [ath9k-devel] iwconfig drives which modules in the kernel/ath9k To: Serene Gud serene_...@yahoo.co.in Cc: ath9k ath9k-devel@lists.ath9k.org Date: Monday, April 11, 2011, 9:49 AM On Mon, Apr 11, 2011 at 3:16 AM, Serene Gud serene_...@yahoo.co.in wrote: Hi all, I am able to print out the present operating frequency from the ath9k/main.c file in dmesg and if I change the frequency using iwconfig, the output of of dmesg shows that the frequency has been changed. As far as I could figure out struct ieee80211_channel is defined in ./include/net/cfg80211.h which defines one element as center_freq. But what I do not know is that which file has the code that is affected by the iwconfig wlan0 channel # command because struct ieee80211_channel is used in may files in ./net/mac80211 ./net/wireless and ./drivers/net/wireless/ath/ath9k folders mainly. *driver in main.c see ath_set_channel which is called by ath9k_config (this is called by mac80211 callback .config) *then look at ieee80211_set_channel in mac80211 * look at wext-* files (complex) If anybody knows, kindly share... Thanks! ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel Yes, I am printing the value of operating frequency from ath_set_channel in ath9k/main.c and it comes up in the dmesg every time I change the value with iwconfig. Thanks a lot for the telling me about ieee80211_set_channel in mac80211 ! In case I need to test and see if I can manually insert a channel value in ieee80211_set_channel, what is the best way of doing it? My purpose is to know which is the function/struct that I exactly need to address when I need to put my function that will make the channel change without the use of iwconfig command but on the basis of the data values provided in the function; dynamically without intervention. ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
[ath9k-devel] iwconfig drives which modules in the kernel/ath9k
Hi all, I am able to print out the present operating frequency from the ath9k/main.c file in dmesg and if I change the frequency using iwconfig, the output of of dmesg shows that the frequency has been changed. As far as I could figure out struct ieee80211_channel is defined in ./include/net/cfg80211.h which defines one element as center_freq. But what I do not know is that which file has the code that is affected by the iwconfig wlan0 channel # command because struct ieee80211_channel is used in may files in ./net/mac80211 ./net/wireless and ./drivers/net/wireless/ath/ath9k folders mainly. If anybody knows, kindly share... Thanks! ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] ath9k: how to change channels dynamically
--- On Mon, 4/4/11, Adrian Chadd adr...@freebsd.org wrote: From: Adrian Chadd adr...@freebsd.org Subject: Re: [ath9k-devel] ath9k: how to change channels dynamically To: Kanika Grover serene_...@yahoo.co.in Cc: ath9k-devel@lists.ath9k.org Date: Monday, April 4, 2011, 10:25 PM it depends what you're trying to do. Are you trying to dynamically change channel based on channel usage? Then you can just look at mac80211; it already knows how to change channels. It'll just call the driver to change the channel as appropriate. You don't need to necessarily modify ath9k to do it. Are you trying to do some kind of synthetic, slow frequency hopping? (eg with quick channel changes?) Then that's a different story. Adrian Hey Adrian and people, C'mon please suggest me which function/files will help me modify channel hopping functionality in ath9k driver? Thanks! SGS ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] ath9k: how to change channels dynamically
--- On Wed, 4/6/11, Larry Vaden va...@texoma.net wrote: From: Larry Vaden va...@texoma.net Subject: Re: [ath9k-devel] ath9k: how to change channels dynamically To: Serene Gud serene_...@yahoo.co.in Cc: Adrian Chadd adr...@freebsd.org, ath9k-devel@lists.ath9k.org Date: Wednesday, April 6, 2011, 11:48 AM On Wed, Apr 6, 2011 at 11:31 AM, Serene Gud serene_...@yahoo.co.in wrote: --- On Mon, 4/4/11, Adrian Chadd adr...@freebsd.org wrote: From: Adrian Chadd adr...@freebsd.org Subject: Re: [ath9k-devel] ath9k: how to change channels dynamically To: Kanika Grover serene_...@yahoo.co.in Cc: ath9k-devel@lists.ath9k.org Date: Monday, April 4, 2011, 10:25 PM it depends what you're trying to do. Are you trying to dynamically change channel based on channel usage? Then you can just look at mac80211; it already knows how to change channels. It'll just call the driver to change the channel as appropriate. You don't need to necessarily modify ath9k to do it. Are you trying to do some kind of synthetic, slow frequency hopping? (eg with quick channel changes?) Then that's a different story. Adrian Hey Adrian and people, C'mon please suggest me which function/files will help me modify channel hopping functionality in ath9k driver? Thanks! SGS I thought Adrian's answer was concise and to the point. That said, here's some pseudo code: . make a decision which yields the next operating frequency . stuff it in mac80211 or thereabouts. prn until you get it right! End of story. -- Larry Vaden, CoFounder Internet Texoma, Inc. Serving Rural Texomaland Since 1995 We Care About Your Connection! Exactly Larry, It was too to the point. I am sorry but I do not have much knowledge about kernel programming and I do not know which functions in the file will change it. I do not know where should I stuff it in mac80211 or inside ath9k files. I tried doing it in some of the existing files but i do not know their basis. No matter where I do, the channel is picked up from the hostapd. Kindly be a little more detailed. Thank you so much for your time! -SGS ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] ath9k: how to change channels dynamically
--- On Tue, 4/5/11, Adrian Chadd adr...@freebsd.org wrote: From: Adrian Chadd adr...@freebsd.org Subject: Re: [ath9k-devel] ath9k: how to change channels dynamically To: Kanika Grover serene_...@yahoo.co.in Cc: ath9k-devel@lists.ath9k.org Date: Tuesday, April 5, 2011, 8:55 AM it depends what you're trying to do. Are you trying to dynamically change channel based on channel usage? Then you can just look at mac80211; it already knows how to change channels. It'll just call the driver to change the channel as appropriate. You don't need to necessarily modify ath9k to do it. Are you trying to do some kind of synthetic, slow frequency hopping? (eg with quick channel changes?) Then that's a different story. Adrian ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel Hey Adrian, Yes, I am trying to change the channel based on channel usage, but I do not exactly know which files/functions (and how they are connected to others; function calls) in mac80211 and ath9k I need to address. Can you give me some idea as to where in the code I should look into? Thanks, SGS ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] ath9k performance issues
--- On Tue, 4/5/11, Felix Fietkau n...@openwrt.org wrote: From: Felix Fietkau n...@openwrt.org Subject: Re: [ath9k-devel] ath9k performance issues To: Bernhard Walle bernh...@bwalle.de Cc: ath9k-devel@lists.ath9k.org Date: Tuesday, April 5, 2011, 9:29 PM On 2011-04-05 5:44 PM, Bernhard Walle wrote: Hello, we're using a PCIe AR9280 card on a Octeon MIPS CPU. The system that does the transmission has a high CPU utilization: iperf in UDP mode with 50M bandwith has ~90 % CPU utilization with a high softirq proportion. Using an Intel card (5300) has a lower CPU utilization (~60 %), but it's no option to use it because the Linux driver has no access point mode. Are there any tweaks to decrease the CPU utilization with the ath9k driver? Any recommendations for the application to send the network packets more efficient? What kernel version are you using? Are you using the in-kernel ath9k or are you using compat-wireless? I have added quite a few performance optimizations over time, as I'm working with much slower MIPS CPUs than the octeon. In my tests, a 300 MHz MIPS 24K CPU is good enough for handling around 90 mbit/s of traffic with only around 70% CPU utilization. - Felix Now thats interesting Felix :) , how have you managed to get all these? --SGS ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] ath9k performance issues
On 2011-04-05 6:03 PM, Serene Gud wrote: On 2011-04-05 5:44 PM, Bernhard Walle wrote: Hello, we're using a PCIe AR9280 card on a Octeon MIPS CPU. The system that does the transmission has a high CPU utilization: iperf in UDP mode with 50M bandwith has ~90 % CPU utilization with a high softirq proportion. Using an Intel card (5300) has a lower CPU utilization (~60 %), but it's no option to use it because the Linux driver has no access point mode. Are there any tweaks to decrease the CPU utilization with the ath9k driver? Any recommendations for the application to send the network packets more efficient? What kernel version are you using? Are you using the in-kernel ath9k or are you using compat-wireless? I have added quite a few performance optimizations over time, as I'm working with much slower MIPS CPUs than the octeon. In my tests, a 300 MHz MIPS 24K CPU is good enough for handling around 90 mbit/s of traffic with only around 70% CPU utilization. - Felix Now thats interesting Felix :) , how have you managed to get all these? What do you mean with 'get all these'? - Felix Sorry, I am new to these things; what I wanted to ask you was that with the kind of CPU info that you have; how were you able to get 90 mbit/s of traffic. I am using a much faster CPU with 1.66 Ghz 512K still I usually get 65mbit/s. I am using in-kernel ath9K. Are you using compat-wireless? Are there any other changes that you have made to your system? I have no idea if we can make the tx bitrate stable? If you have done that, kindly share. Thanks! SGS ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] ath9k performance issues
--- On Tue, 4/5/11, Felix Fietkau n...@openwrt.org wrote: On 2011-04-05 6:54 PM, Serene Gud wrote: On 2011-04-05 6:03 PM, Serene Gud wrote: On 2011-04-05 5:44 PM, Bernhard Walle wrote: Hello, we're using a PCIe AR9280 card on a Octeon MIPS CPU. The system that does the transmission has a high CPU utilization: iperf in UDP mode with 50M bandwith has ~90 % CPU utilization with a high softirq proportion. Using an Intel card (5300) has a lower CPU utilization (~60 %), but it's no option to use it because the Linux driver has no access point mode. Are there any tweaks to decrease the CPU utilization with the ath9k driver? Any recommendations for the application to send the network packets more efficient? What kernel version are you using? Are you using the in-kernel ath9k or are you using compat-wireless? I have added quite a few performance optimizations over time, as I'm working with much slower MIPS CPUs than the octeon. In my tests, a 300 MHz MIPS 24K CPU is good enough for handling around 90 mbit/s of traffic with only around 70% CPU utilization. - Felix Now thats interesting Felix :) , how have you managed to get all these? What do you mean with 'get all these'? - Felix Sorry, I am new to these things; what I wanted to ask you was that with the kind of CPU info that you have; how were you able to get 90 mbit/s of traffic. I am using a much faster CPU with 1.66 Ghz 512K still I usually get 65mbit/s. I am using in-kernel ath9K. Are you using compat-wireless? Are there any other changes that you have made to your system? The device I used was using an AR7130 MIPS CPU. I set it up as an access point (with 4addr/wds mode enabled), then used another device as a 4-addr client. Both were set up for bridging wireless to wired. After that I ran iperf TCP sessions between two laptops (each connected to one of the embedded devices). Thanks Felix. I set up an Access point with master mode enables (with the help of hostapd). I have no idea if we can make the tx bitrate stable? If you have done that, kindly share. Are you using the ath9k rate control or are you using minstrel_ht? My tests were done with minstrel_ht. You can enable it by disabling the config option for the ath9k rate control. My client had an intel card which uses it own rate control so I am using a USB wireless card now which uses minstrel but my Access point on the other hand uses ath9k_rate_control. I guess I should make them both use the same rate control algo. --SGS ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
Re: [ath9k-devel] ath9k: how to change channels dynamically
Thanks for the information. But I need to know more details of the ath9k driver functionality. --- On Mon, 4/4/11, Larry Vaden va...@texoma.net wrote: From: Larry Vaden va...@texoma.net Subject: Re: [ath9k-devel] ath9k: how to change channels dynamically To: Kanika Grover serene_...@yahoo.co.in Cc: ath9k-devel@lists.ath9k.org Date: Monday, April 4, 2011, 8:01 AM On Sun, Apr 3, 2011 at 5:35 PM, Kanika Grover serene_...@yahoo.co.in wrote: Hi all, I am using Fedora 14. I am new to ath9k, please help me figure out which will be the files/modules that I need to change if I have to introduce channel hopping/channel switching in my ath9k driver. I have been looking at the ath9k code for a while but haven't been able to figure out the dependencies of the files completely. Is there a flowchart available of how the functions have been placed in ath9k? Also, would it be better to use the whole kernel source installed from yum downloader or would it be better to use compat wireless. thanks! While I doubt it tells anywhere near the whole story you are looking to read and understand, you might want to start at http://devices.natetrue.com/wiviz/. wiviz is found in Ubiquiti's SDK if not elsewhere. Said SDK is at http://www.ubnt.com/downloads/firmwares/XN-fw/v5.3/SDK.UBNT.v5.3.tar.bz2. HTH. BTW, what is your application for channel/frequency hopping? regards/ldv -- Larry Vaden, CoFounder Internet Texoma, Inc. Serving Rural Texomaland Since 1995 We Care About Your Connection! ___ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
