Software :: Detect A Throttled Clock In Software?
Jun 3, 2010
I'm running on a Xenon L5408 and my OS is CentOS 5.4. The system I'm developing needs to be able to run in a room that *may* get rather hot. When the core temperatures gets up to around 99DegC I get the following message sent to the terminal. "temperature above threshold cpu clock throttled". So Linux some how knows whats going on. So I'm now running in a degraded state. My question is, from an application I'm writting (c++), how would I go about detecting a throttled clock.
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Jun 25, 2011
It's from my /var/log/messages
Jun 25 12:27:19 nl kernel: CPU0: Temperature/speed normal
Jun 25 12:27:19 nl kernel: CPU4: Temperature/speed normal
Jun 25 12:27:19 nl kernel: CPU6: Temperature/speed normal
Jun 25 12:27:19 nl kernel: CPU2: Temperature/speed normal
Jun 25 12:27:19 nl kernel: CPU3: Temperature/speed normal
Jun 25 12:27:19 nl kernel: CPU7: Temperature/speed normal
[Code]...
I checked the temps with ln_sensors, KVM and DC temps, everything is running great. I didn't get any shutdown in the meantime. I basically need a way to disable those warnings but reboot is out of question, means no BIOS. Hope its possible to disable it from the console itself, with blacklistinh some kernel module(s) or something like that.
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Jun 14, 2010
Got HP proliant dl360 g6 running RHEL 5 (x86_64). 10 days ago full update was done, inc kernel was upgraded. Everything has worked normally until today I got in log:
Jun 14 09:28:02 hp_proliant kernel: CPU3: Temperature above threshold, cpu clock throttled
Jun 14 09:30:41 hp_proliant kernel: Machine check events logged
Jun 14 10:01:01 hp_proliant mcelog: Processor 371118208 heated above trip temperature. Throttling enabled.
Jun 14 10:01:01 hp_proliant mcelog: Please check your system cooling. Performance will be impacted
Jun 14 10:01:01 hp_proliant mcelog: Processor 371118208 heated above trip temperature. Throttling enabled.
Jun 14 10:01:01 hp_proliant mcelog: Please check your system cooling. Performance will be impacted
Server room as AC, temperature is normal all the time.
hpasmcli -s "show temp" shows everything (AMBIENT, CPU#-s , CPU ZONE ) is normal, belowe threshold.
Current kernel: 2.6.18-194.3.1.el5 #1 SMP Sun May 2 04:17:42 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
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Apr 19, 2011
I have had a fairly perplexing problem with my Lubuntu Maverick installation on my laptop for the past few weeks. My laptop is connected to a DSL-based LAN via 100mbps Ethernet - pretty typical. Usually, the download speed from most websites tends to be around 340-350kb/s. However, its Ethernet connection seems to be having some strange hiccups. The speed starts out at normal ranges, but after about 5-10 minutes of internet use through any means (be it loading normal web pages, streaming video, downloading a file via a browser, or even other uses such as downloading a torrent using Transmission, or even a command line application such as apt, aptitude or wget, etc), the speed suddenly drops to around 40kb/s and will not raise again.
Once this happens, the drop is seen across the board. Again, once it happens, the speed of everything that accesses the internet is affected. Web pages load slowly, all downloads will only operate at a maximum of 40kb/s, whether it is from any browser, or wget in a terminal. The speed stayed slow until I restarted, which would give me another 5-10 minutes. My troubleshooting attempts yielded some very strange results, which I will relate here:.......
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Sep 14, 2010
I want to check if traffic to a specific URL is being throttled by a hospital acting as an ISP. A client is having great trouble accessing a hosted web-app from inside the hospital, but access is fine from outside. The hospital IT dept are not interested as the rest of the Internet is fine. I need to trace where the latency is creeping in or where the throttling is happening, if I can do that, the hospital will remove it. Traffic is standard http to a specific URL.
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May 27, 2011
I'm using a very simple conky script to diplay the date and time on my desktop. I've noticed that he conky clock is a few seconds early compared to the time displayed in the right hand side of the top panel (Natty). I guess both displays are based on the same "internal" time, so I'm left wondering how this could happen, and how to sync back the clocks.
It seems that Conky is in sync with the system date, while the panel clock is 2 seconds late (on my system). Checked with while true; do date; sleep 0.1; done
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Aug 2, 2011
Just curious as to if it is possible to have the clock in the center of the task bar centered clock in Ubuntu 11.04?
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May 2, 2011
Does anyone know of an interface to a quartz clock that can be used for a TOD clock?? I want to interface it to an Arduino board. Can be GPIO or USB.
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Sep 2, 2011
I had cloned a centos 5.6 installation from virtualbox virtual machine to physical box. Everything work fine. However, the time showing in os using date command differs from bios time by roughly 4 hours. I am running ntp services which sync the time with another centos server on the network. It appears that some services are using virtual clock and some use physical clock. How do I get rid of virtual clock and only use physical clock?
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May 29, 2011
I've installed Squeeze 2.6.32-5-amd64 on my laptop (Alienware M17X R3, Intel i7 Sandybridge, ATI Technologies Inc Broadway [ATI Mobility Radeon HD 6800 Series])The screen is 17", with maximum resolution of 1920 x 1080. After a default install of the operating system, the maximum resolution I can select is 1280 x 1024.My research so far has suggested that I need to edit the /etc/X11/xorg.conf file and provide xorg with the necessary resolution.
Again, by default, the xorg.conf file is not created. This leads me to believe that xorg is scanning my hardware at startup and providing me with whatever it thinks is appropriate. I tried following these instructions to generate an xorg.conf file. This process created an xorg.conf file under /root/.
When I copy this xorg.conf file to /etc/X11, I get a blank (i.e. black) screen. Deleting this file restores the default resolution 1280 x 1024.This system is dual booting with Windows 7. Under windows I am able to get a 1920 x 1080 resolution, so I know my hardware is up to it.At this stage I have yet to install the drivers for the Radeon graphics card.What are my options regarding configuring xorg to give me a higher screen resolution?
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May 2, 2010
I have a new F12 install, and my syslog is filling up with messages about USB. I have 2 USB devices plugged in directly to the mobo (bluetooth keyboard receiver, touchscreen), and it keeps redetecting them and then disabling the port for some reason.
A small sample of what keeps on repeating:
Quote:
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Jan 12, 2010
Code...
To find the appropriate firmware without knowing the make or brand of your wireless chip, you can use the command:
#fw-detect
But apparently debian package do not offer this useful tool, well, certainly for sidux exclusively.
Is there a package of fw-detect eventually?
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Feb 6, 2010
i set my clock with this command-/usr/sbin/ntpdate -v ntp-1.mcs.anl.gov ntp-2.mcs.anl.gov
but my clock changes to incorrect time when i restart my system,how can i make it stable?
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Aug 25, 2010
I live in Helsinki. The time zone is GMT+2. I tried to set the clock in BIOS but Ubuntu's clock is still 3 hours late. Why? And how to fix it? PS. I want command-line solutions, not GUI.
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Nov 20, 2010
After daylight savings time, my squeeze installation's clock failed to adjust. I've tried to change this in the bios, but it always resets itself.
Is there a way to force-change the time?
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Jul 29, 2009
When installing I perhaps mistakingly told Fedora it should use the BIOS clock and now it shows the wrong time, 1 hour ahead of my time-zone GMT+0. If I try and go to the preferences and set the time the 'Advanced Options' one of which I need are grayed out, I need the 'Use local time source' option to be unchecked. Could somebody tell me a workaround or the command-line commands to tell it not to do this anymore?
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Mar 5, 2010
Everytime i switch between XP and Fedora, my system clock changes with +/- 2 hours.... So I have to adjust my system time everytime.
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Mar 15, 2010
I tried to adjust my system clock to daylight savings time, but now everytime I restart the computer it's reset. For example, I set the clock to 11:40 AM, Mon. 15 Feb. Upon restart, it's now 12:05 AM, Tue. 16 Feb. I've readjusted the clock several times, and it resets at every reboot.
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Jun 30, 2011
Today I missed class because my clock was an hour slow. The cause of this seems to be because the windows time service wasn't switched on. Seems to work fine now. Why does windows not use the hardware clock on the motherboard? What does Linux do?
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May 11, 2010
I noticed that there is a clock in my notification area. This isn't really a problem but it looks pretty right next to another clock.
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Mar 8, 2011
I've finally returned to Ubuntu after leaving it in 2005 because of compatibility issues, but now I'm back and am hoping to stay. My experience with Ubuntu has been great by far and I can safely say that it has improved since '05. Anyway, I'm just wanting to fix this minor little occurrence I just had. You see, the Ubuntu clock and weather isn't appearing anymore. It was there and I don't even remember seeing it removed until now. I don't recall doing anything other than browse the web at the moment and I do recall the time being there before I did some surfing. Anyway, My name is still listed in the upper-right corner of the screen still. Just not the time. Did anyone else have this problem and know of a fix?
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Apr 29, 2011
After the upgrade I cannot see the time, which usually appears at the top-right part of the screen. When I click on it and get the calendar, I can faintly discern the numbers that are there.
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Jan 27, 2011
I installed the new KDE 4.6 after considering a change from XFCE.The issue is that I get no clock widget, but instead a red x.
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Nov 27, 2010
I've been running a fedora server for over a year now, and has seen some very strange issue, that really make it uncomfortable to use, and that I cannot manage to solve easily.
The problem is as follow : sometimes (every 20-30 minutes or so : this time is quite random), the server completely hangs.
I'm using it mainly remotely, through ssh and nfs. What I see when it "hangs" is the following:
-no ping response
-nfs stalled
-ssh sessions hangs (for example, if I run a "top" command", it just isn't updated anymore
-disk activity led stays completely off (in normal activity, it is almost always blinking, even due to "internal" server activities, so network disconnection doesn't explain that either)
The most strange thing is that, to resume it, I basically have 3 options : wait (sometimes few tens of seconds, usually between 2 and 4 minutes!), just hit a key on the keyboard!, or do something like un/plugging any king of usb peripheral (which makes me think of some interruption mechanism that is stalled).
When it "wakes up", I see my "top" session over ssh suddenly being quickly updated hundreds of times (for all it has not received during the "pause"), ping says that the packets have actually all been received (with long times, for example, packet 1 : 80xxxms, packet 2 : 79xxxms, packet 3 : 78xxxms..... packet 79 : 1xxxms, packet 80 : 0.xxxms), the disk is quite overloaded for a few seconds, and everything is back at normal!
Furthermore, I think this i related, but my clock drifts for few hours per day (3 holding minutes every 20-30 minutes makes me think there is some relation!)
I tried to set up ntpd to compensate it, but sometimes the suspensions are just too long, and I ended up with
Code:
Nov 27 01:22:36 server ntpd[699]: 0.0.0.0 0617 07 panic_stop +1203 s; set clock manually within 1000 s
and ntpd dies...
You'll ask me to have a look at the log, which I did by
Code:
But when the suspension happens, there is absolutely nothing new in all those files!
Version information :
Code:
I said in the title "F13-F14", because I already had the problem with F13, but after some time it disappeared (I may have changed some configuration, I have to admit...). I still have a backup of the "/etc" tree of that "working" F13.
The hardware for F13[working] and F14[not_working] is the same : Phenom II X4 on an ASUS M3N78 PRO, data on raid 10, system on separated SATA disk, 8Gb RAM, some qemu vms running (between 4 and 6).
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Apr 17, 2010
KDE world clock does not work I mean when I put it as widget it apper very small I can not see any thing on it and I can not open it to the desktop by double click as I use to do in KDE 3
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Aug 9, 2010
There is no clock on my panel after the 11.3 install. I don't get it. I unlock the widgets and there is a digital clock there, but I cannot drag it to the panel, only the desktop. So I suppose there is another way of adding it. The standard clock is not a widget?
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Oct 20, 2010
My laptop's clock (Acer Extensa 5220) seems to be slow. I've corrected it 5 minutes forward last week and now have just corrected minute forward again. Is there a program [apart from time servers] to correct clock properly, for example, by shifting it a bit every hour? Is there already a program to put it to crontab or I should hack up a script? Or I should check more things?
I have found that HW clock is right, but system time is slow: about a second each 2.1 hours.
root@vi-notebook:~# dmesg | egrep 'clock|unstable'
[ 0.103785] Switching to clocksource tsc
[ 0.265274] Marking TSC unstable due to TSC halts in idle
[ 0.265514] Switching to clocksource acpi_pm
[ 1.321408] rtc_cmos 00:09: setting system clock to 2010-10-30 00:10:48 UTC (1288397448)
Is placing "hwlock --hctosys" to crontab a right thing?
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Jan 28, 2011
While dual-booting Windows and Linux, Linux sets the system time to UTC, so Windows thinks it's midnight near mid-morning. Is there any other way to tell Windows to use UTC? I've seen the registry tweak proposed here and other places. This does not work on my computer (Windows 7 32-bit).For reference, the registry entry is this:HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlTimeZoneInformation]"RealTimeIsUniversal"=dword:00000001
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Mar 1, 2010
I was just surfing the web the screen suddenly went blank and then the clock went off.
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Apr 2, 2010
No clue how to change the 24 hour clock format in Lubuntu 10.04 Beta.
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