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  • how many processors can I get in a block on cuda GPU?

    - by Vickey
    hi all, I have two questions to ask 1) If I create only one block of threads in cuda and execute the my parallel program on it then is it possible that more than one processors would be given to single block so that my program get some benefit of multiprocessor platform ? 2) can I synchronize the threads of different blocks ? if yes please give some hints. Thanks in advance since I know I'll get replies as always I get.

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  • java.math.BigInteger pow(exponent) question

    - by Jan Kraus
    Hi, I did some tests on pow(exponent) method. Unfortunately, my math skills are not strong enough to handle the following problem. I'm using this code: BigInteger.valueOf(2).pow(var); Results: var | time in ms 2000000 | 11450 2500000 | 12471 3000000 | 22379 3500000 | 32147 4000000 | 46270 4500000 | 31459 5000000 | 49922 See? 2,500,000 exponent is calculated almost as fast as 2,000,000. 4,500,000 is calculated much faster then 4,000,000. Why is that? To give you some help, here's the original implementation of BigInteger.pow(exponent): public BigInteger pow(int exponent) { if (exponent < 0) throw new ArithmeticException("Negative exponent"); if (signum==0) return (exponent==0 ? ONE : this); // Perform exponentiation using repeated squaring trick int newSign = (signum<0 && (exponent&1)==1 ? -1 : 1); int[] baseToPow2 = this.mag; int[] result = {1}; while (exponent != 0) { if ((exponent & 1)==1) { result = multiplyToLen(result, result.length, baseToPow2, baseToPow2.length, null); result = trustedStripLeadingZeroInts(result); } if ((exponent >>>= 1) != 0) { baseToPow2 = squareToLen(baseToPow2, baseToPow2.length, null); baseToPow2 = trustedStripLeadingZeroInts(baseToPow2); } } return new BigInteger(result, newSign); }

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  • Problem with Copy-Item -force

    - by andemt
    Hi, This is part of my image-copy-script: Get-Childitem | where {$.Extension -eq ".png" -or $.Extension -eq ".gif" -or $_.Extension -eq ".jpg"} | Copy-Item -destination $dest -force It works fine, and it can overwrite files. Well, it can overwrite if the existing file have attribute R or A. Not when its blanked. Error in red text: "Copy-Item : The file '\server\d$\path\thumbs\007487l.jpg' already exists." Why?

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  • SystemInformation.PowerStatus.BatteryLifeRemaining returns -1?

    - by dsrdakota
    In my code I have: Dim ps as PowerStatus = SystemInformation.PowerStatus Dim batteryTimeLeft as Integer = ps.BatteryLifeRemaining 'I have a problem here MsgBox("Time left on battery: " & cstr(batteryTimeLeft),vbInformation,"Info") PowerStatus.BatteryLifeRemaining always returns -1 when I have a battery present and used or when not used. Why does this always return -1? I currently am using MS .NET 4.0 Client Profile on VB.NET 2010 Express. I unplug the for my laptop and see if it makes a difference and it doesn't. Also tried in plugged in. Help please???

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  • Android ACTION_BOOT_COMPLETED called everytime?

    - by user3976029
    I am trying to write a code in Android , to create a condition during booting but my condition satisfies everytime ( during booting as well as during running of the device also). I am trying to do is , to execute the condition during the booting only. My Code : MainActivity.java package com.example.bootingtest; import android.os.Bundle; import android.widget.Toast; import android.app.Activity; import android.content.Intent; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (Intent.ACTION_BOOT_COMPLETED!=null) { Toast.makeText(getApplicationContext(), "Device is booting ...", Toast.LENGTH_LONG).show(); } } } I have given manifest permission . <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> I want to execute this condition only during booting or device start-up but this condition satisfies every time , whenever i open the app. Please suggest me , how can i run the condition only during the device booting or start-up. Please help me out.

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  • Reboot windows machines at a certain time of day and automatically login with Python

    - by Tom
    I know how to reboot machines remotely, so that's the easy part. However, the complexity of the issue is trying to setup the following. I'd like to control machines on a network for after-hours use such that when users logoff and go home, or shutdown their computers, whatever, python or some combination of python + windows could restart their machines (for cleanliness) and automatically login, running a process for the night, then in the morning, stop said process and restart the machine so the user could easily login like normal. I've looked around, haven't had too terribly much luck, though it looks like one could do it with a changing of the registry. That sounds like a rough idea though, modifying the registry on a per-day basis. Is there an easier way?

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  • Tab Sweep: Arquillian, Power Mac, PowerPC, JSP Performance, JMX Connection, ...

    - by arungupta
    Recent Tips and News on Java, Java EE 6, GlassFish & more : • Extreme Portability: OpenJDK 7 and GlassFish 3.1.1 on Power Mac G5! (Mark Heckler) • Using GlassFish domain templates to easily create several customized domains (Masoud Kalali) • OpenJDK 7 on Apple G5 PowerPC on Mac OS X 10.5.8 (John Yeary) • ENABLING REMOTE ADMINISTRATION FOR GLASSFISH (Adam Bien) • The Java EE 7 Feature List: Cloud Focused Upgrades (devx) • Improve JavaServer Pages Performance with Caching (distributedcaching) • Interactive Glassfish configuration and application deployment (mpashworth) • Allow JMX connection on JVM 1.6.x (Martin Muller) • Arquillian 1.0.0.Final released! Ready for GlassFish and WebLogic! Death to all bugs! (Markus Eisele) • Using GlassFish and APEXListener as backend for Apache so server APEX (Ronald Rod) • Installing and running Eclipse, Glassfish and Ubuntu 12.04 Precise for Web Applications (Connected Web) • Java EE 6 and modular JAX-RS services (Parijat) • ARQUILLIAN CONFIGURATION FOR EMBEDDED GLASSFISH 3.1.2 AND MAVEN 3 (Adam Bien) • Atmosphere .9 released (JeanFrancois Arcand) • Make JSF your friend again (Daniel Pfeifer)

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  • Extreme Portability: OpenJDK 7 and GlassFish 3.1.1 on Power Mac G5!

    - by MarkH
    Occasionally you hear someone grumble about platform support for some portion or combination of the Java product "stack". As you're about to see, this really is not as much of a problem as you might think. Our friend John Yeary was able to pull off a pretty slick feat with his vintage Power Mac G5. In his words: Using a build script sent to me by Kurt Miller, build recommendations from Kelly O'Hair, and the great work of the BSD Port team... I created a new build of OpenJDK 7 for my PPC based system using the Zero VM. The results are fantastic. I can run GlassFish 3.1.1 along with all my enterprise applications. I recently had the opportunity to pick up an old G5 for little money and passed on it. What would I do with it? At the time, I didn't think it would be more than a space-consuming novelty. Turns out...I could have had some fun and a useful piece of hardware at the same time. Maybe it's time to go bargain-hunting again. For more information about repurposing classic Apple hardware and learning a few JDK-related tricks in the process, visit John's site for the full article, available here. All the best,Mark

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  • HTML5 - Does it have the power to handle a large 2D game with a huge world?

    - by user15858
    I have been using XNA game studio, but due to private reasons (as well as the ability to publish anywhere & my heavy interest in isogenic engine), I would like to switch to HTML5. However, I have very high 2D graphic demands for my game. The game itself will have a HDD size of anywhere between 6GB (min) to 12GB (max) which would be a full game deployed offline. The size of the images aren't significantly large, so streaming would be entirely possible if only those assets required were streamed as needed. The game has a massive file size because of the sheer amount of content. For some images or spritesheets, they would be quite massive. (ex. a very large Dragon, which if animated in a spritesheet would be split into two 4096x4096 sheets or one 8192x8192 sheet). Most assets would be very small, and about 7MB for a full character with 15 animations in every direction (all animations not required immediately) so in the size of a few hundred KB to download before the game loads. My question, however, is if the graphical power of HTML5 is enough to animate several characters on screen at once, when it flips through frames quite rapidly. All my sprites have about 25 frames per animation, 5 directions (a spritesheet for each direction & animation), and run at 30fps. Upon changing direction, animation, or a new character entering, spritesheets would change and be constantly loading/unloading. If I pack all directions in a single sheet, it would be about 2048x2048 per sheet. Most frameworks have no problem with this, but I am afraid from what I read that HTML5's graphical capabilities will limit me. Since it takes significant time simply to animate characters in any language, I'd like a quick answer.

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  • Maxtor 500GB external hard drive not being detected but power is going to it?

    - by ClarkeyBoy
    I have 2 * Maxtor Onetouch 4 Lite 500GB external hard drives (part no. 9NT2A4-500). They both used to work fine on my old laptop (an Acer) but I have not used them for about a year, since my laptop was stolen and I got this one (also an Acer [Aspire 7738G]). I have one plugged into the mains with one of the leads I believe was supplied with them. It appears to be receiving power as it is warm and the power light (on the unit itself) is on; also the mains adapter is fairly warm. I also have it plugged into my laptop with a USB lead which I have tested on my mp3 player (so I know it works). However my hard drive is not showing on my computer. I have tried checking for new hardware, installing the software that was supplied with it, checking drive letters in case it is registered as C: or something stupid, checking for problems etc... I can't find any cause for it to do this. It does appear to be starting up and, possibly, shutting down and restarting constantly (that's what it sounds like altho I can't be certain). I have had both hard drives stored in different places for the last year and they're both doing the same thing.. if it was only one then I'd guess it had got damaged or corrupted or something but since it is both I doubt this is it. The only things in common with both of them are the leads and the laptop, however I know the USB lead works and guess the mains lead works as there is power going to the unit. Has anyone come across this before or does anyone have any idea what the cause / solution to the problem is? Any help would be greatly appreciated. Regards, Richard

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  • What is the difference betweeen "Network install" and "Network Boot" options in virt-manager when installing a new virtual machine

    - by Marwan
    From my understanding of PXE (Preboot Execution Environment), I know that there must be some negotiation first between the booting client and a DHCP server to obtain network parameters (IP address, etc) in order for the client to be able to fetch the boot loader and kernel image from the boot server. In other words, and aside from being a "virtual" machine, we're talking here about a "bare metal" machine, so there must be some "pre boot" mechanism for those negotiations to take place, and this is exactly what PXE is all about. When I think about the "Network install" option, I can't figure out how the new VM would be able to fetch the boot images (bootloader and kernel) without the previously mentioned mechanism. So, here is a short version of the question: When provisioning a new virtul machine, how do you expect the "Network install" option in virt-manager to work behind the scenes? Many thanks.

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  • How to boot linux direct to application on console with no login

    - by amanda
    I have a need to start an application on bootup on the linux console and I do not have a need for any type of login or security. I do not need any ALT-F1,F2,etc virtual consoles but I would like to allow SSH access via the network port for debugging, loading, etc. The application is a SDL graphics program running with fbcon as the SDL_VIDEODRIVER if that matters. I'm currently using Fedora 10 and 12 but any distro that supports SDL using the fbcon framebuffer would be acceptable.

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  • good/full Boot Spirit examples using version 2 syntax

    - by bpw1621
    Almost all of the examples I've gone and looked at so far from: http://boost-spirit.com/repository/applications/show_contents.php use the old syntax. I've read and re-read the actual documentation at http://www.boost.org/doc/libs/1_42_0/libs/spirit/doc/html/index.html and the examples therein. I know Joel is starting a compiler series on the blog http://boost-spirit.com/home/ but that hasn't gotten in full swing yet. Any other resources to see worked examples using some more sophisticated/involved aspects in the context of fully working applications?

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  • Trying to install Windows 7 on Samsung 530u3c. Laptop won't boot

    - by Osvaldo
    I just bought a Samsung 530u3c with Windows 8 installed,so it's a week old. From day one, I have wanted to revert back to Windows 7. So I have created a USB bootable drive with Windows 7 on, and tried installing it both on the SSD 24GB drive and the 465GB SATA HDD. The laptop will not boot from either drive. After trying to boot once, the laptop reboots and then presents me with a boot menu that only shows the SATA HDD. Selecting it does nothing. So I'm losing my mind here. I have absolutely no clue on how to solve this. I'm starting to think i just threw away 700 Euros... :( Any thoughts on what my next steps should be in troubleshooting the issue? Installation goes through without problems. All files are copied. By the time the laptop needs to restart, it goes into a boot loop.

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  • Boot strapper for VSTO 3.0 SP1

    - by Amjid Qureshi
    Hi, I've got a .net 3.5 vs2008 Excel addin. I've created an installer for it and have it working apart from the fact that I cant get an option in the prerequisites for VSTO 3.0 SP1. I have one for VSTO 3.0 and when I check the C:\Program Files (x86)\Microsoft SDKs\Windows\v6.0A\Bootstrapper\Packages\VSTOR30 directory it has vstor30.exe vstor30sp1-KB949258-x86.exe product.xml "en" directory. However when I build the installer only the vstor.exe file gets copied over to the bin directory. I need vstor3.0sp1 for the addin to work. If I manually install vstor sp1 then everything works fine.

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  • How long do managed gigabit ethernet switches take to boot up?

    - by Warren P
    One critical drawback that I have found in researching managed-switches, and one that I have some past experience with is that anything with "lots" of firmware is going to have lots of issues associated with that firmware. We are in the middle of researching rackmount gigabit switches (48 port). It looks like for 48 ports, our only choice is managed switches (Dell, Cisco/Linksys,HP, etc). What I want to know, that I can not find out much about is the boot-time for various managed switches. If you own one, can you please answer with the model number, and the cold boot time in seconds. I have read online that Linksys (now Cisco) SRW series sometimes take almost 5 minutes before they are fully booted up, and that is an unacceptable cost for us. I particularly want to know about Dell PowerConnect managed switch bootup time (model 3548 and 5448), and would like to confirm the 5-minute boot time on the SRW2048 or similar model, and any HP ProCurve boot up times. The composite of all those figures ought to form an interesting overall performance picture.

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  • Ubuntu 10.04 recognizing USB 2.0 external HD as USB 1.1

    - by btucker
    When I connect the USB 2.0 drive I see this: usb 1-4.3: new full speed USB device using ohci_hcd and address 5 so I know it's getting seen as USB 1.1. usb-devices shows that it really is USB 2.0 and connected to a USB 2.0 hub: T: Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 2 Spd=12 MxCh= 4 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=05e3 ProdID=0608 Rev=77.61 S: Product=USB2.0 Hub C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=13fd ProdID=1340 Rev=02.10 S: Manufacturer=Generic S: Product=External C: #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=2mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage It seems the problem is that root hub is: T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh=10 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=1d6b ProdID=0001 Rev=02.06 S: Manufacturer=Linux 2.6.32-25-server ohci_hcd S: Product=OHCI Host Controller S: SerialNumber=0000:00:02.0 C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub And there's no mention of ehci_hcd. lsusb -t gives me: /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ohci_hcd/10p, 12M |__ Port 4: Dev 2, If 0, Class=hub, Driver=hub/4p, 12M |__ Port 2: Dev 4, If 0, Class=stor., Driver=usb-storage, 12M |__ Port 3: Dev 5, If 0, Class=stor., Driver=usb-storage, 12M |__ Port 6: Dev 3, If 0, Class=stor., Driver=usb-storage, 12M It seems like I'm missing something which would allow the OS to see USB 2.0 devices. Can anyone point me in the right direction? EDIT Full lsusb -v output: Bus 001 Device 005: ID 13fd:1340 Initio Corporation Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x13fd Initio Corporation idProduct 0x1340 bcdDevice 2.10 iManufacturer 1 Generic iProduct 2 External iSerial 3 57442D574341595930323337 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xc0 Self Powered MaxPower 2mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 8 Mass Storage bInterfaceSubClass 6 SCSI bInterfaceProtocol 80 Bulk (Zip) iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0001 Self Powered Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 0 Full speed (or root) hub bMaxPacketSize0 64 idVendor 0x05e3 Genesys Logic, Inc. idProduct 0x0608 USB-2.0 4-Port HUB bcdDevice 77.61 iManufacturer 0 iProduct 1 USB2.0 Hub iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 25 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 Unused bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0001 1x 1 bytes bInterval 255 Hub Descriptor: bLength 9 bDescriptorType 41 nNbrPorts 4 wHubCharacteristic 0x00e0 Ganged power switching Ganged overcurrent protection Port indicators bPwrOn2PwrGood 50 * 2 milli seconds bHubContrCurrent 100 milli Ampere DeviceRemovable 0x00 PortPwrCtrlMask 0xff Hub Port Status: Port 1: 0000.0100 power Port 2: 0000.0103 power enable connect Port 3: 0000.0103 power enable connect Port 4: 0000.0100 power Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 1 Single TT bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0001 Self Powered Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 0 Full speed (or root) hub bMaxPacketSize0 64 idVendor 0x1d6b Linux Foundation idProduct 0x0001 1.1 root hub bcdDevice 2.06 iManufacturer 3 Linux 2.6.32-25-server ohci_hcd iProduct 2 OHCI Host Controller iSerial 1 0000:00:02.0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 25 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 0mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 Unused bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0002 1x 2 bytes bInterval 255 Hub Descriptor: bLength 11 bDescriptorType 41 nNbrPorts 10 wHubCharacteristic 0x0002 No power switching (usb 1.0) Ganged overcurrent protection bPwrOn2PwrGood 1 * 2 milli seconds bHubContrCurrent 0 milli Ampere DeviceRemovable 0x00 0x00 PortPwrCtrlMask 0xff 0xff Hub Port Status: Port 1: 0000.0100 power Port 2: 0000.0100 power Port 3: 0000.0100 power Port 4: 0000.0103 power enable connect Port 5: 0000.0100 power Port 6: 0000.0103 power enable connect Port 7: 0000.0100 power Port 8: 0000.0100 power Port 9: 0000.0100 power Port 10: 0000.0100 power Device Status: 0x0003 Self Powered Remote Wakeup Enabled

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  • Simple startup on boot of misc application (Java based) on Ubuntu Linux 8+ as a daemon

    - by Berlin Brown
    What is the easiest way to have an application launch at startup on Ubuntu server as daemon? This is a java application (java com.run.run.Run) etc. How would I have it launch as a user and possibly have access to write to some log file where the user has permissions to write? And if I don't end up doing that, how would I launch the application as the root user at startup. Edited: It is a headless server, I don't have access to the desktop applications.

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  • Laptop will boot to some usb flash drives but not others.

    - by evolvd
    Laptop: HP Compaq 6710b I can boot from usb just fine with the following usb flash drives: Cruzer micro 4GB HP 4GB The flash drive that will not boot: Flash Voyager 8GB To knock out variables I did the following: Using Hard Disk Low Level Format Tool I performed a low level format Full erase with Flash Memory Tookit In windows 7 I formated the drive to fat32 Used USB-Boot-Tester to write to the drive Also used uNetbooting with various distros to see if that would make a difference My guesses on what could be preventing the drive from booting: The laptop does not support booting to usb flash drives larger than 4GB The drive is defective in some way

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