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• CloudSeeder: CLR Stored Procedures For Creating CPU Pressure

  - by Adam Machanic

  Sometimes, in the interest of testing various scenarios that your server might encounter, it's useful to be able to quickly simulate some condition or another. I/O, memory, CPU pressure, and so on. This latter one is something I've been playing with a lot recently. CPU pressure in SQL Server creates all sorts of interesting side-effects , such as exacerbating waits and making various other conditions much easier to reproduce. In order to make this simpler, I've created the attached CLR library. This...(read more)

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• Ubuntu 14.04 Slow, High CPU Usage

  - by user273012

  I experienced CPU strange behavior after installing Ubuntu 14.04, at 5 or 10 minutes, CPU usage suddenly increased about 50%, that's really slow my laptop down (Ubuntu 13.10 worked fine by the way) Here is my laptop specs : ASUS A43SA Intel Core i3-2330M 2.20 GHz 4 GB of RAM I noticed this when the first installation, even after I disabled online and file search, even after I switch to GNOME 3, and even after I used GNOME Fallback Session, how to solve this?

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• CPUID on Intel i7 processors

  - by StarPacker

  I'm having an issue with my CPUID-based code on newer i7-based machines. It is detecting the CPU as having a single core with 8 HT units instead of 4 cores each with 2 HT units. I must be misinterpreting the results of the CPUID information coming back from the CPU, but I can't see how. Basically, I iterate through each processor visible to Windows, set thread affinity to that thread and then make a sequence of CPUID calls. args = new CPUID_Args(); args.eax = 1; executeHandler(ref args); if (0 != (args.edx & (0x1 << 28))) { //If the 28th bit in EDX is flagged, this processor supports multiple logical processors per physical package // in this case bits 23:16 of EBX should give the count. //** EBX here is 0x2100800 logicalProcessorCount = (args.ebx & 0x00FF0000) >> 16; //** this tells me there are 16 logical processors (wrong) } else { logicalProcessorCount = 1; } apic = unchecked((byte)((0xFF000000 & args.ebx) >> 24)); if (maximumSupportedCPUID >= 4) { args = new CPUID_Args(); args.eax = 4; executeHandler(ref args); //EAX now contains 0x1C004121 coreCount = 1 + ((args.eax & 0xFC000000) >> 26); //This calculates coreCount as 8 } else { coreCount = 1; } This sequence repeats for the remainder of the CPUs in the system. Has anyone faced this before?

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• Task Manager: CPU usage history

  - by Nezdet

  I bougth recently a server with 2 x X5550, they are quad (4 cores each) total 8 cores If I check the task manager it shows in the CPU usage history 16 diagrams, Should't it be 8 cause I have 2 processors with quad? or the diagrams maybee shows the Threads of the CPU?

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• Insane CPU usage in QT 5.0

  - by GravityScore

  I'm having trouble using the QT framework, particularly with the paintEvent of QWidget. I have a QWidget set up, and am overriding the paintEvent of it. I need to render a bunch of rectangles (grid system), 51 by 19, leading to 969 rectangles being drawn. This is done in a for loop. Then I also need to draw an image on each on of these grids. The QWidget is added to a QMainWindow, which is shown. This works nicely, but it's using up 47% of CPU per window open! And I want to allow the user to open multiple windows like this, likey having 3-4 open at a time, which puts the CPU close to 150%. Why does this happen? Here is the paintEvent contents. The JNI calls don't cause the CPU usage, commenting them out doesn't lower it, but commenting out the p.fillRect and Renderer::renderString (which draws the image) lowers the CPU to about 5%. // Background QPainter p(this); p.fillRect(0, 0, this->width(), this->height(), QBrush(QColor(0, 0, 0))); // Lines for (int y = 0; y < Global::terminalHeight; y++) { // Line and color method ID jmethodID lineid = Manager::jenv->GetMethodID(this->javaClass, "getLine", "(I)Ljava/lang/String;"); error(); jmethodID colorid = Manager::jenv->GetMethodID(this->javaClass, "getColorLine", "(I)Ljava/lang/String;"); error(); // Values jstring jl = (jstring) Manager::jenv->CallObjectMethod(this->javaObject, lineid, jint(y)); error(); jstring cjl = (jstring) Manager::jenv->CallObjectMethod(this->javaObject, colorid, jint(y)); error(); // Convert to C values const char *l = Manager::jenv->GetStringUTFChars(jl, 0); const char *cl = Manager::jenv->GetStringUTFChars(cjl, 0); QString line = QString(l); QString color = QString(cl); // Render line for (int x = 0; x < Global::terminalWidth; x++) { QColor bg = Renderer::colorForHex(color.mid(x + color.length() / 2, 1)); // Cell location on widget int cellx = x * Global::cellWidth + Global::xoffset; int celly = y * Global::cellHeight + Global::yoffset; // Background p.fillRect(cellx, celly, Global::cellWidth, Global::cellHeight, QBrush(bg)); // String // Renders the image to the grid Renderer::renderString(p, tc, text, cellx, celly); } // Release Manager::jenv->ReleaseStringUTFChars(jl, l); Manager::jenv->ReleaseStringUTFChars(cjl, cl); }

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• Concurrent processes do not utilize all available CPU

  - by metdos

  I run some processes on an EC2 cc2.8xlarge instance which has 32 virtual processors. For some type of processes, when I run 16 processes on parallel, all of them use 100% of CPU cycles. But for other type of processes, they are not using 100% CPU and they finish considerably slower than a single thread. There is no time spend on IO and all data is served from memory. Do you have any idea about the reason of this problem?

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• Lower CPU % used by FFMPEG Process via PHP (FLV Video Conversion)

  - by BoRo

  Hi, Okay, so I currently execute an ffmpeg command via PHP to run a video conversion. The Problem I'm Having is during the conversion, the ffmpeg process(es) use up so much CPU/Processing Power (near 100%), which slows down the response of my webserver. Is there a Way (crontab or script) I can limit the ffmpeg processes to a certain CPU percentage? Thanks,

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• Intel GMA 500 support for 11.10

  - by lucazade

  I would like to know if the new open-source video driver included in kernel 3.0.x for the Intel GMA 500 will be included by default in the kernel that will be shipped in OO. The driver support of this GFX chipset has always been poor and mainly community-driven, now finally we have a KMS open-source driver, written by kernel hackers, and actually included in staging kernel repo. If there is any kind of testing needed there is a mega-thread on Ubuntu Forums with hundreds of users ready to test everything.

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• Can not connect to wireless on 12.04 with Intel WiFi Link 5100

  - by WiData

  I am having problem in connecting to wifi. I have dual boot (Windows 7 and Ubuntu 12.04) on my Dell Studio 15. I upgraded to 12.04 quite some time ago (at least one month) from 11.10. Everything was working fine till yesterday. Since yesterday I can see the list of available Wifi connection but does not connect to any or if connects (after hours of trying) then disconnects after few minutes. My wifi interface is Intel WiFi Link 5100 AGN. However the problem is on both Windows and Ubuntu. Here are outputs of some commands which may be useful for those interested in helping: ~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:22:19:fa:65:bb UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:17 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:794 errors:0 dropped:0 overruns:0 frame:0 TX packets:794 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:56280 (56.2 KB) TX bytes:56280 (56.2 KB) wlan0 Link encap:Ethernet HWaddr 00:22:fb:d2:fc:ce UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:239 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:53603 (53.6 KB) Here is the output for the command sudo lshw -C network *-network description: Wireless interface product: WiFi Link 5100 vendor: Intel Corporation physical id: 0 bus info: pci@0000:04:00.0 logical name: wlan0 version: 00 serial: 00:22:fb:d2:fc:ce width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-48-generic-pae firmware=8.83.5.1 build 33692 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn resources: irq:47 memory:f8000000-f8001fff My kernel version is kernel version 3.2.0-48-generic-pae I also checked this post which was helpful. But I am not sure if what is the exact problem. Any suggestions will be helpful. Should I be changing the firmware/driver? Currently my /lib/firmware has following iwlwifi files /lib/firmware/iwlwifi-1000-5.ucode /lib/firmware/iwlwifi-5000-5.ucode /lib/firmware/iwlwifi-100-5.ucode /lib/firmware/iwlwifi-5150-2.ucode /lib/firmware/iwlwifi-105-6.ucode /lib/firmware/iwlwifi-6000-4.ucode /lib/firmware/iwlwifi-135-6.ucode /lib/firmware/iwlwifi-6000g2a-5.ucode /lib/firmware/iwlwifi-2000-6.ucode /lib/firmware/iwlwifi-6000g2a-6.ucode /lib/firmware/iwlwifi-2030-6.ucode /lib/firmware/iwlwifi-6000g2b-6.ucode /lib/firmware/iwlwifi-3945-2.ucode /lib/firmware/iwlwifi-6050-5.ucode /lib/firmware/iwlwifi-4965-2.ucode Thanks a lot for the help.

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• Intel Fortran error #10001

  - by Ricardo

  I have a problem with the Intel Fortran compiler. It has been working fine in 8.04 and 10.04 LTS (well, some changes required during the installation due to the fact that 10.04 uses dash and not bash as the shell /bin/sh) Now I have upgraded to 12.04 and when compiling I get the following message: ifort: error #10001: could not find directory in which g++ resides Is there anybody that knows how to solve this problem?

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• Intel GMA 500 support for 11.10

  - by lucazade

  I would like to know if the new open-source video driver included in kernel 3.0.x for the Intel GMA 500 will be included by default in the kernel that will be shipped in Oneiric Ocelot. The driver support of this GFX chipset has always been poor and mainly community-driven, now finally we have a KMS open-source driver, written by kernel hackers, and actually included in staging kernel repo. If there is any kind of testing needed there is a mega-thread on Ubuntu Forums with hundreds of users ready to test everything.

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• Driver for the Intel GMA X4500HD

  - by broiyan

  I have a Dell Vostro 220s with the built-in Intel GMA X4500HD graphics adapter. I am using Maverick (10.10). My Philips 190CW 1440 x 900 pixel monitor is connected via the analog path. After a fresh installation of Maverick, this works on various resolutions but 1440 x 900 is not one of the available options. I may need a hardware specific driver. Does a GMA X4500HD driver exist that will work on Maverick?

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• Graphics driver being reported as Gallium 0.4 on llvmpipe (LLVM 0x300) instead of intel

  - by schonjones

  I have an integrated Intel 945GM in a Toshiba laptop. Previously the graphics driver was reported correctly, but at some point it has changed. I've noticed general poor performance and though it should meet minimum requirements for unity 3d is using unity 2d. Under the details panel in system settings it is now reporting Gallium 0.4 on llvmpipe (LLVM 0x300). any help would be appreciated. I have searched google for hours trying to find an answer.

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• Dual Frame Buffer on Ubuntu 12.04 Intel HD Graphics 4600 i7-4770

  - by user3692512

  I have 2 monitors connected to the PC, one in HDMI, one in DVI. I have Intel integrated graphics HD4600 Now as far my understanding, both the monitors is connected at the same framebuffer /dev/fb0 How can I detach them and create 2 frame buffers at startup, so that I can directly write to the second monitor, by writing on the /dev/fb1, and not hamper the /dev/fb0, so that x-server can run normally on that?

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• How add cpu frequency that should be available?

  - by Andrew Redd

  I have a system with an Intel Core i7 970 that should be able to run at 3.2 GHz. I'm running ubuntu 12.04 and installed the cpufreq indicator to be able to change the governor and noticed that I only had frequencies up to 2.0 GHz available to me. I set to performance and checked with cpufreq-info cpufreq-info -c 0 cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to [email protected], please. analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 1 2 3 4 5 6 7 8 9 10 11 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us. hardware limits: 1.60 GHz - 2.00 GHz available frequency steps: 2.00 GHz, 1.86 GHz, 1.73 GHz, 1.60 GHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 1.60 GHz and 2.00 GHz. The governor "performance" may decide which speed to use within this range. current CPU frequency is 2.00 GHz (asserted by call to hardware). cpufreq stats: 2.00 GHz:4.93%, 1.86 GHz:0.03%, 1.73 GHz:0.02%, 1.60 GHz:95.02% (718654) And to double check: $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 1995000 1862000 1729000 1596000 How do I get all the frequencies that I should have available to me, all up to the 3.2 GHz?

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• cpu use goes to 100% when I lock the screen

  - by gianni

  Whenever I lock the screen, after a certain amount of time, the cpu and the cpu fan use go up near the limit, and it returns back to normal the moment I unlock the screen again (as shown by psensor). How can I find out what process is responsible for this? I've tried with "top -S", and the result is this... PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2114 me 20 0 326m 104m 40m R 16 2.6 66:50.03 compiz 1234 root 20 0 396m 152m 98m R 6 3.8 20:23.88 Xorg 2204 me 20 0 160m 38m 30m S 4 1.0 0:33.35 yakuake 2446 me 20 0 206m 18m 12m S 4 0.5 6:32.18 psensor 2280 me 20 0 220m 18m 10m S 2 0.5 5:01.60 unity-panel 9138 me 20 0 154m 27m 15m S 2 0.7 0:03.63 plugin-cont 2282 me 20 0 65800 5272 3316 S 1 0.1 4:36.90 hud-service 2143 me 20 0 140m 11m 8352 S 1 0.3 2:50.16 indicator-m 9095 me 20 0 720m 253m 36m S 1 6.4 0:26.34 firefox 2076 me 20 0 7168 3484 828 S 1 0.1 1:46.53 dbus-daemon 2307 me 20 0 55000 5132 3632 S 1 0.1 2:01.55 indicator-a 2557 me 20 0 86328 6028 4576 S 0 0.1 1:44.71 conky 6290 me 20 0 2836 1296 964 R 0 0.0 0:29.64 top 6291 me 20 0 2836 1188 884 S 0 0.0 0:29.49 top 1 root 20 0 3644 1984 1284 S 0 0.0 60:57.76 init specs: ubuntu 12.04 fresh install intel core i5 4gB ram

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• ksoftirqd uses 100% cpu

  - by andy

  I am running 32bit Ubuntu 10.04. A lot of the times ksoftirqd/0 or ksoftirqd/1 start using up 100% CPU for no apparent reason, and I am forced to reboot my laptop. Incidentally this also happens when I maximize my (youtube) videos on Chrome and Fireox, but once I un-maximize the videos the CPU usage goes down to the original levels. Any ideas what it going on? --- Addendum --- dmesg produces a ~2000 line output. I searched for 'error' and 'warning' in the output, and here are the relevant lines (along with some headers): [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 2.6.32-21-generic (buildd@yellow) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #32-Ubuntu SMP Fri Apr 16 08:09:38 UTC 2010 (Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2) [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=157dcfda-acd6-4d1b-a6a8-ff9ccff61906 ro quiet splash [ 0.000000] KERNEL supported cpus: [ 0.000000] Intel GenuineIntel [ 0.000000] AMD AuthenticAMD [ 0.000000] Centaur CentaurHauls [ 0.000000] BIOS-provided physical RAM map: [ 24.775546] EXT3-fs warning: mounting fs with errors, running e2fsck is recommended [44920.210518] ata1: SError: { PHYRdyChg CommWake 10B8B Dispar LinkSeq TrStaTrns } [44920.210531] res 40/00:00:f0:4b:7f/00:00:18:00:00/40 Emask 0x10 (ATA bus error) [58673.134623] chrome[20101]: segfault at 7f38bc4ad000 ip 00007f38be769ecc sp 00007fff24616850 error 4 in libpepflashplayer.so[7f38bdc08000+e55000] [ 24.775546] EXT3-fs warning: mounting fs with errors, running e2fsck is recommended [44920.210531] res 40/00:00:f0:4b:7f/00:00:18:00:00/40 Emask 0x10 (ATA bus error)

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• Downclock CPU reaching critical temperature

  - by Draga

  I have an HP tx1250 laptop. It always had serious overheating problems and although usually it runs fine I'm now running a continuous test for my dissertation, this brings the CPU temp close to the critical and from time to time the computer shutdown for reaching it (checked the log). I use to have the same problem on Win XP but I noticed Win Vista and 7 downclock the CPU when is necessary to cool it down so I was thinking if the same is possible on Ubuntu 12. The only program I've found that may do the job is computer temp ( http://computertemp.berlios.de/ ) but it doesn't seems to work under Ubuntu 12. The inside of the laptop is fairly clean, the thermal paste is quite recent, I'm keeping it lifted from the desk and judjung by the sound of the fan that's running fine as well. The pc in now running between 78 and 91 degrees C but about once a day it shut down for reaching 95. I need the results of the test it's running pretty soon so it's important that it runs non-stop. I've though to set the maximum clock of the CPU to slightly less the maximum but then these tests I'm running would take much more time. Thanks! PS: first and last HP laptop for me.

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• Intel programming "performance" books? [closed]

  - by user997112

  I vaguely remember seeing that Intel have produced a few good books, especially with regards to low latency programming, but I cannot remember the titles. Could people suggest the titles of Intel books (or ones relating to Intel products)? Examples include books on: -Intel Compiler -Intel Assembler -Any low level programming on Intel assembler -The Intel CPU architecture -Intel threading blocks library

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• Low graphics performance with Intel HD graphics

  - by neil

  hey, my laptop should be capable of running some games fine but doesn't. Examples are egoboo and tome. http://www.ebuyer.com/product/237739 this is my laptop. I tried the gears test and i only get 60 FPS, on IRC they said thats a big issue and should try the forums. I am using Ubuntu 11.04 and was told I should have the newest drivers. neil@neil-K52F:~$ /usr/lib/nux/unity_support_test --print OpenGL vendor string: Tungsten Graphics, Inc OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile GEM 20100330 DEVELOPMENT OpenGL version string: 2.1 Mesa 7.10.2 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity supported: yes

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• Wifi will not connect with an Intel Wifi Link 1000

  - by Wallace Panter

  I have an HP dv7t-6100CTO laptop. I have linux ubuntu 12.04 lts dual booted. The specs of my laptop are: - i7-2620m dual core (2.7 ghz) processor - intel wifi link 1000 bgn wireless card I am having a hard time getting my laptop to connect to the internet through wireless. Ethernet is fine, but at college I need wireless the majority of the time. Can anyone help? Some steps I have done: I have tried WICD while uninstalling the Network Manager. When that didn't work, I uninstalled WICD and reinstalled Network Manager. I an not really sure what else to do.

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• Apport-gpu-error-intel.py crash

  - by artfulrobot

  Feeling disempowered by Ubuntu's new bug reporting policy/system. My Intel i5 machines have all experienced daily (if not more frequent) freezes, but it's very difficult to report bugs now and policy instead is just for ubuntu to collect counts; no way for me to see that anything is (or is not) being worked on. I've just experienced a freeze and now on reboot I'm stuck in a cycle of "Ubuntu has an internal error" (presumably Ubuntu never experiences an external error...) do you want to report it? Yes. Oh another internal error... It looks like this report could contain useful information. Is there anyway to make sure it gets provided to the people who can fix it?

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• HDMI with Intel Mobile 4 Graphics Controller

  - by roel

  When connecting my TV over HDMI, it shows up in display settings and xrandr: Aspire1825PTZ:~$ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) Aspire1825PTZ:~$ xrandr Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192 LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm 1366x768 60.0*+ 1360x768 59.8 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) HDMI1 connected (normal left inverted right x axis y axis) 720x576 50.0 720x480 59.9 DP1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) DP3 disconnected (normal left inverted right x axis y axis) TV1 disconnected (normal left inverted right x axis y axis) However, the resolution is way too low and the screen remains black. Everything works fine in Windows, but I'd rather not reboot just to watch a film... Could anyone help me please?

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• Minecraft flickers sometimes and colors get buggy on an Intel HD Graphics 3000

  - by Oskar

  I really like Ubuntu, but I always had to switch back to Windows just because I couldn't get my Intel HD Graphics 3000 to work. So, 11.10 came out and I'm trying to get things work in this update, so I can finally stay with Ubuntu and use it. Anyways, things seem to be more stable here, but they're still a bit fishy. I'm doing tests with Minecraft. Currently, there's only 1 minor bug. The game flickers from time to time and the colors get buggy or something I read that maybe I should update to kernel 3.1? Maybe 32-bit Ubuntu is better? It was impossible to play Minecraft in 11.04, but 11.10 is so much more stable.

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• Why ubuntu 12.04 Operating System too slow..?

  - by Sumit Singh

  I was using ubuntu 10.10 from last year. every thing was Ok with that. recently I've installed Ubuntu 12.04 in place of 10.10, after installing that on my Dell laptop, I started to feel uncomfortable. It to slow event if you move mouse then its feel like i'll take 1min to move one place 2 another.. I know why this is happening, all because of 12.04 runs my CPU up to 99%-100% all over time. And there are 2-3 processes who use all the cpu.. like 1. System_Monitor 2. compiz I don't know why its use all the CPU even Other app can't able to run .. in Ubuntu 10.10 every think was Ok.. Any solution for this problem..!! | Thank's

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