Slackware :: How To Disable Cpu Throttling In 13
May 7, 2010
I'm trying to install ATLAS which requires disabling cpu throttling. Normally one can do it in the BIOS, while there isn't such an option of my dell inspiron 6400. Actually there is a SpeedStep option in the BIOS, however, you cannot get the highest but the lowest performance by disabling it (dell!!!).
After googled a lot, I found in some distros, there is a /usr/bin/cpufreq-selector through which one can disable throttling. But it doesn't exists in slackware.
I known that by appending kernel option "acpi=off", one can disable the whole acpi and thus the throttling control in slackware, but it seems so dirty.
Anyone known a better way to do it?
ps: With a intel T2050 cpu, i didn't find the directory /sys/devices/system/cpu1, but only the /sys/devices/system/cpu0. Similar case in /etc/acpi. it seems that slackware treats my cpu as a single core one, while it is not.
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Sep 2, 2009
After being forced to rebuild my computer (failed drive) I finally got current and installed F11 (was using F9). I was watching GKrellm last night and noticed something odd. The CPU frequency on my processor (Phenom 9600) was scaled to the slower speed and was rarely being pushed to full speed.
I verified that cpuspeed was in ondemand mode and ran some processor intense tasks (huge image loads, large file cats, large yum installs, etc...). Only when I was able to sustain near 100% load would the system throttle to the full clock speed. It would then drop back to the slower speed very quickly even though the process was still running. As a rough benchmark, I ran these tasks again in performance mode to see what impact this was having. Most of these tasks were taking as much as 40-50% longer to complete in ondemand mode.
Digging further, I found that the default up_threshold in F11 is set to 95%!! This is verified by cating /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold. This means that the system would not throttle to full speed unless a 95% load was sustained for multiple samples (36 miliseconds each by default).
I overrode these settings in /etc/sysconfig/cpuspeed. I change up_threshold to 60 and down_threshold to 30. I am at work right now, so I can't benchmark this change until tonight. I guess I could have just set it to performance mode and left it, but I'd rather save the power when the machine is idle.
Does anyone have any thoughts on why 95% is the default and if there is any problem/benefit to changing this to a much lower value? It seems that anyone with a CPU running SpeedStep or CoolnQuiet would suffer the same severe performance impacts I saw with the default values.
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Jun 8, 2010
I want to install ATLAS on my laptop to do this i have to turn of cpu throttling.
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Nov 21, 2010
I'm trying to get speedstep to work on a intel ss4200 NAS box with a core 2 duo e4600 cpu.
I'm running Fedora 13; Kernel 2.6.34.7-56.SS4200.fc13.x86_64, which is custom with a couple of patches to properly enumerate the hard drive controler.
For some reason the cpu frequency driver it is picking is "p4-clockmod", how do i force the kernel to load the correct driver?
Code:
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May 14, 2010
I am trying to limit bandwidth of certain ip addresses on my server. I have been doing hours of reading and not getting very far...
So far I believe the iptables command is:
And now I just need the tc command to read those marks and limit bandwidth, I have a gigabit connection and would like to limit each of these ip addresses to 10mbit in and out.
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Mar 28, 2010
If I read /proc/acpi/processor/CPU0/throttling my processor is at T2 and I can not move it down to T0.
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Nov 25, 2010
There seems to be many different ways of controlling bandwidth usage of downloads of content from Apache2. Does anyone know which is the standard module deployed/deployable in OpenSuse?
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Apr 23, 2011
How to do bandwidth throttling in Squid server? i wan to set particular bandwidth for particular ip, how to do it in Squid server?
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Mar 2, 2009
Is there a way of throttling a process resources, something akin to limits but for processes not users?ie I want processX to be restricted in the amount of memory it can consume. For process cpu I guess I can simply nice the process, but total memory consumption is my primary concern.
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Jan 12, 2011
I have de Dell desktop (optiliex 755) and i have instal CentOS 5.5 on it. Some informations about the system are:
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Jul 7, 2011
The blueman applet is killing my processor from time to time. The crazy part is that I do not have blue tooth installed in this system. It appears to be a bug upstream and looks like it has been reported but in the mean time is there a way to disable blueman?
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May 1, 2011
I want to install the Nvidia drivers because I suspect nouveau to be responsible for some system freezes. It seems that I need to disable nouveau before I can get nvidia working. How do I do this?
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Jul 4, 2010
I'm going to set up a new linux router for a company, and have to set up bandwidth throttling. They have an unlimited ADSL internet connection which will be shared between 2 businesses, one being them. I will need to set it up so their connection will never be slowed down by the other business. They will both be connected to the same NIC, but will be on different subnets. How would I go about doing this?
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Nov 6, 2010
Every time I use Transmission for torrent download it throttles my Internet connection although I set speed limits way below my bandwidth.
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Apr 26, 2010
I'm not getting file transfers that utilize the max bandwidth of my ADSL broadband. I have a 512 kbps line (I know that's not broadband in most places, but such is the option available to me), and I usually get download speeds of 55-60 kbps. Since the past couple of days, this has dropped to an abysmal 2-3 kbps. So I used [url] to test my download speeds, and they were as expected (i.e. the usual 55-60 kbps). I also used the speed test page of my ISP, and that too, gave the usual results. There has been no throttling from the ISP, as I confirmed from their help desk.
Also, web pages open fine. It's only when I'm downloading a file (Yeah, web pages are also files, but what I mean is compressed archived files; .rar, .tar.?g* et.al.) that I can't get the desired speed. I haven't changed the resolv.conf file, not have I made any other changes that might cause this. I use ppp to dial-up to my ISP, and use the pon and poff scripts that ppp provides. I have a peers file configured for my ISP, which again, I haven't edited.
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Aug 20, 2010
I am uploading the incremental backups using duply/duplicity using the sftp-module. As the initial upload is pretty big and runs several days (more than 50GB over a 1Mbps-line) I am confronted with the problem that other users in the network experience slowdowns when I upload.
I would like to run a script every n minutes which pings a host in the internet (second hop of the traceroute for example). If the response time is less than a value (150ms), the script throttles the upload for one specific host and protocol. Traffic to the local net (Samba mainly) should be unaffected. I cannot use the QoS of the firewall/router. Also I would like the penalty to be removed if the ping is quicker (loess than 70ms for example) I looked at trickle, and some other out-of-the-box shaping tools but they do not give me the possibility to change the rate while the upload is running.
I would now write a script in perl which uses [URL]some wrapper for iptables combined with some ping module [URL] Also I was trying to get the proof of concept before I start coding: (I haven't verified if this works yet)
sudo tc qdisc add dev eth0 root handle 11: cbq bandwidth 100Mbit avpkt 1000 mpu 64
sudo tc class add dev eth0 parent 11:0 classid 11:1 cbq rate 100kbit allot 1514 prio 1 avpkt 1000 bounded
sudo tc filter add dev eth0 parent 11:0 protocol ip prio 16 u32 match ip dst MyserverIP flowid 1:1
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Aug 17, 2010
How to disable KTTSD in slackware linux?
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Apr 25, 2010
how to disable backup files? It is kinda annoying when editing lot of files and I personally see no point having them.
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Jul 14, 2010
I do not want akonadi on startup. How do I disable it?
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May 2, 2010
I've always run as root on Slackware, but having done away with Ubuntu for now, all of my machines including the family desktop are running Slackware. There have been several ups and downs and the last one that I know of (for now) is the HP Device Manager. It doesn't run as root so I've never noticed that it drastically slows down printing via a shared printer. Disabled the system just sends it's requests to the samba/cups server and starts printing instantly. The HP Device Manager seems to go through an intialization step each time that takes several seconds before I can even hit the "print" button.
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Mar 22, 2011
I've been messing around with fail2ban regex and heard that you can get better performance by disabling syslogd buffering. By better performance I mean that fail2ban can detect more login failures per second than with syslogd buffering turned on.How do you disable syslogd buffering
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Aug 6, 2010
I have Aspire one 752 netbook with slack 13.1 installed. I installed laptop-mode-tools from slackbuilds to control power management and etc. I'd like to make sure that sda drive in netbook never spins off when not running on batteries. For now it seems to spin down after every half a minute and is producing clicking sounds. I issued 'hdparm -B 255 /dev/sda' which seemed to work - no clicks any more, and no spinning-up sounds. What is the right way to make this change to be applied whenever netbook is on AC power?Edit: Also, how to make this 'hdparm -B 255 /dev/sda' survive hibernate, as it reverts to '96' after being resumed:
# hdparm -B /dev/sda/dev/sda: APM_level = 96Edit2: Ok, i changed hdparm -B values from 254 to 255 in laptop-mode.conf, since values of 254 and any other i tried(1, 96, 128) gave ioctl errors and were not applied to drive.
Code:
# hdparm -B 96 /dev/sda
/dev/sda:
[code]....
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Apr 12, 2010
I'm thinking about some ways to limit access to my web-server. It runs Nginx and php in FCGI. The server contains a large amount of information. The data is freely available and no authentication is required but other companies might like to mirror it and use on their own servers.
The requests could be limited on different levels: IP, TCP, HTTP (by nginx) or by the php application. I found some solutions (like Nginx's limit_req_zone directive), but they do not solve the second part of the problem: there's no way to define a whitelist of clients who are allowed to use the data.
I thought about an intellectual firewall that would limit the requests on IP basis, but I'm yet to find such device. Another way was to hack some scripts that would parse the log file every minute and modify the iptables to ban suspicious IPs. It would take days and I doubt this system will survive, say, 1000 requests per second.
Perhaps, some HTTP proxy, like Squid, could do this?
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Feb 19, 2010
How you disable it? it makes no sense you have to type all those non capital and capital letters just to access a directory correctly.
in windows you just type the name and it detects whatever you type capital or not...
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Oct 12, 2010
I login as root every time (its a closed system) and I am running it on a laptop. I want to disable the touch pad after typing for 4 seconds.I have tried adding this command:syndaemon -i 4 -dto rc.4, rc.local, rc.httpd, http.mysqld
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May 11, 2011
I can manage my printer through the web browser interface in 12.2 without cookies but in 13.1 I need to allow cookies.
When did CUPS start requiring cookies to be enabled to use the web browser interface?
Is there an option to disable the cookies requirement?
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May 7, 2011
I just finished setting up my slack machine as a home server (printers & files) and I noticed that I have an IPv6 address (from ifconfig)... I didn't know I did. I used to work in tech support and when a windows or OSx machine didn't connect properly on a LAN, disabling IPV6 was a common troubleshooting step. Is there a way to easily turn inet6 connectivity off/on in Slackware? (I want to keep the ability to get an IPv6, we will all use those in the future)
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May 31, 2010
On a Slack64 13.1 with stock kde :
How can I disable the folder preview which occur when the mouse stay to a folder icon on the desktop (I use "Folder view" on the desktop) ?
Similarly, is it possible to disable the popup displaying comment and help when the mouse stay over a icon shortcut to an application ? If yes, how and where ?
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Mar 29, 2010
how to disable pcmcia probing during boot in Slack >= v.13? I have an Asus eeepc 1000HA with no need for pcmcia support.
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May 28, 2010
Looking for opinions on what is the best way to disable the touchpad on a Sony VAIO. I just installed Slack64 13.1 and love it...
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