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  • Hardware VPN suddenly slow, even after replacement. Free software VPN speed is fast [closed]

    - by Andrew
    In our company we have two remote users, one in Northern California and one in Texas, that connect via VPN. We have a hardware SSL VPN unit, and suddenly this week they experienced massive slowdown, to the point of speedtesting at 0.5 mbps when it is normally 7-10mbps. We replaced the hardware sslvpn but that did not solve the problem. If I have them connect using a free VPN tool like TeamViewer, their speeds are back to normal. Does anyone have any idea why this could happen? We have not made any infrastructure changes so this was very out of the blue and I'm confused as to why even replacing the hardware vpn didn't fix it, if using free software works just fine.

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  • What are the pros of switching DNS names with a database server hardware upgrade?

    - by wilbbe01
    When we upgrade to new hardware at work we usually increment a number in the DNS name. For example. We have a server called database-2, that is slated to become database-3 in the coming days. I haven't been able to find a good reason why this is good behavior. To me the work of trying to catch all end user machines, as well as all servers dependent on the database server is far riskier than simply moving the database and ip/name with it to the new hardware. A little over a year ago we spent several months of requests coming in, as infrequent users began using software that needed to be updated to point to a new DNS name. I am struggling to find answers as to why this is a good practice. So the question. Why is using DNS names as a "server hardware version identifier" a good idea? What am I overlooking? Thanks much.

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  • Droid's mediaserver dies on camera.takePicture()

    - by SirBoss
    On Motorola Droid, Firmware 2.1-update1, Kernel 2.9.29-omap1, Build # ESE81 When attempting to take a picture, mediaserver dies with a segmentation fault. I've tried putting takePicture in a timer and running it a few seconds after camera initialization to check for race conditions, but no change. Just calling Camera.open() doesn't cause the crash. Also, calling Camera.open() causes what I think is the autofocus motor to make a sort of ticking sound. Code that breaks: import android.app.Activity; import android.os.Bundle; public final class ChopperMain extends Activity { public void onCreate(Bundle savedInstanceState) { try { Camera camera = Camera.open(); catch (Exception e) { e.printStackTrace(); } camera.takePicture( new Camera.ShutterCallback() { public void onShutter() { ; } }, new Camera.PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { ; } }, new Camera.PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { ; } }, new PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { System.out.println("Ta da."); } } }); } catch (Exception e) { e.printStackTrace(); } } } Debug Log: D/CameraHal(10158): CameraSettings constructor D/CameraHal(10158): CameraHal constructor D/CameraHal(10158): Model ID: Droid D/CameraHal(10158): Software ID 2.1-update1 D/dalvikvm( 988): GC freed 2 objects / 56 bytes in 215ms D/ViewFlipper( 1074): updateRunning() mVisible=false, mStarted=true, mUserPresent=false, mRunning=false I/HPAndroidHAL(10158): Version 2988. Build Time: Oct 26 2009:11:21:55. D/CameraHal(10158): 19 default parameters D/CameraHal(10158): Immediate Zoom/1:0. Current zoom level/1:0 D/CameraHal(10158): CameraHal constructor exited ok D/CameraService(10158): Client::Client X (pid 10400) D/CameraService(10158): CameraService::connect X D/CameraService(10158): takePicture (pid 10400) I/DEBUG (10159): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** I/DEBUG (10159): Build fingerprint: 'verizon/voles/sholes/sholes:2.1-update1/ESE81/29593:user/release-keys' I/DEBUG (10159): pid: 10158, tid: 10158 >>> /system/bin/mediaserver <<< I/DEBUG (10159): signal 11 (SIGSEGV), fault addr 00000008 I/DEBUG (10159): r0 00000000 r1 00000000 r2 a969030c r3 a9d1bfe0 I/DEBUG (10159): r4 00045eb0 r5 0000eb10 r6 000153a0 r7 a9c89fd2 I/DEBUG (10159): r8 00000000 r9 00000000 10 00000000 fp 00000000 I/DEBUG (10159): ip a969085c sp bec4fba0 lr a9689c65 pc a9d1bfde cpsr 60000030 I/DEBUG (10159): #00 pc 0001bfde /system/lib/libutils.so I/DEBUG (10159): #01 pc 00009c62 /system/lib/libcamera.so I/DEBUG (10159): #02 pc 00007b0c /system/lib/libcameraservice.so I/DEBUG (10159): #03 pc 00021f98 /system/lib/libui.so I/DEBUG (10159): #04 pc 00015514 /system/lib/libbinder.so I/DEBUG (10159): #05 pc 00018dd8 /system/lib/libbinder.so I/DEBUG (10159): #06 pc 00018fa6 /system/lib/libbinder.so I/DEBUG (10159): #07 pc 000087d2 /system/bin/mediaserver I/DEBUG (10159): #08 pc 0000c228 /system/lib/libc.so I/DEBUG (10159): I/DEBUG (10159): code around pc: I/DEBUG (10159): a9d1bfcc bd1061e3 f7f3b510 bd10e97e 4d17b570 I/DEBUG (10159): a9d1bfdc 6886a300 460418ed fff4f7ff d10a4286 I/DEBUG (10159): a9d1bfec 46234913 20054a13 f06f1869 18aa040a I/DEBUG (10159): I/DEBUG (10159): code around lr: I/DEBUG (10159): a9689c54 e0240412 0204f8d0 050cf104 edf0f7fd I/DEBUG (10159): a9689c64 f7fd4628 f8d4ecf2 b1533204 f852681a I/DEBUG (10159): a9689c74 18581c0c 7101f504 ed82f7fd f8c42000 I/DEBUG (10159): I/DEBUG (10159): stack: I/DEBUG (10159): bec4fb60 4000902c /dev/binder I/DEBUG (10159): bec4fb64 a9d19675 /system/lib/libutils.so I/DEBUG (10159): bec4fb68 00002bb4 I/DEBUG (10159): bec4fb6c a9d1b26f /system/lib/libutils.so I/DEBUG (10159): bec4fb70 bec4fbbc [stack] I/DEBUG (10159): bec4fb74 00095080 [heap] I/DEBUG (10159): bec4fb78 a9c8c028 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fb7c a9c8c028 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fb80 00015390 [heap] I/DEBUG (10159): bec4fb84 a9c89fd2 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fb88 00045ebc [heap] I/DEBUG (10159): bec4fb8c afe0f110 /system/lib/libc.so I/DEBUG (10159): bec4fb90 00000000 I/DEBUG (10159): bec4fb94 afe0f028 /system/lib/libc.so I/DEBUG (10159): bec4fb98 df002777 I/DEBUG (10159): bec4fb9c e3a070ad I/DEBUG (10159): #00 bec4fba0 00045eb0 [heap] I/DEBUG (10159): bec4fba4 00045ebc [heap] I/DEBUG (10159): bec4fba8 000153a0 [heap] I/DEBUG (10159): bec4fbac a9689c65 /system/lib/libcamera.so I/DEBUG (10159): #01 bec4fbb0 a9c8c028 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fbb4 00015390 [heap] I/DEBUG (10159): bec4fbb8 000153a0 [heap] I/DEBUG (10159): bec4fbbc a9c87b0f /system/lib/libcameraservice.so I/DEBUG (10159): debuggerd committing suicide to free the zombie! I/DEBUG (10426): debuggerd: Mar 22 2010 17:31:05 W/MediaPlayer( 1021): MediaPlayer server died! I/ServiceManager( 984): service 'media.audio_flinger' died I/ServiceManager( 984): service 'media.player' died I/ServiceManager( 984): service 'media.camera' died I/ServiceManager( 984): service 'media.audio_policy' died W/Camera (10400): Camera server died! W/Camera (10400): ICamera died E/Camera (10400): Error 100 I/System.out(10400): Camera error, code 100 W/AudioSystem( 1021): AudioFlinger server died! W/AudioSystem( 1021): AudioPolicyService server died! I/ (10425): ServiceManager: 0xad08 E/AudioPostProcessor(10425): E/AudioPostProcessor(10425): AudioMgr Error:Failed to open gains file /data/ap_gain.bin E/AudioPostProcessor(10425): E/AudioPostProcessor(10425): AudioMgr Error:Failed to read gains/coeffs from /data E/AudioPostProcessor(10425): Audio coeffs init success. I/CameraService(10425): CameraService started: pid=10425 D/Audio_Unsolicited(10425): in readyToRun D/Audio_Unsolicited(10425): Create socket successful 10 I/AudioFlinger(10425): AudioFlinger's thread 0x11c30 ready to run E/AudioService( 1021): Media server died. E/AudioService( 1021): Media server started. W/AudioPolicyManager(10425): setPhoneState() setting same state 0

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  • USB to Serial cables with CDC support

    - by Harsha
    Hi all, Are there are USB to Serial cables with CDC support? I recently bought these below mentioned cables which claims that they are CDC 1.1 complaint. However, when we received the cables on our verification we found that they were reporting vendor specific device descriptors. Manufacturer Barcode Part Number Quantity Link CABLEMAX 45643276422244 USB-1S1PQ 4 http://www.usbgear.com/USB-1S1PQ.html CABLEMAX USBG-US-232 USBG-US-232 4 linkhttp://www.usbgear.com/USBG-US-232.html linkhttp://www.made-in-china.com/showroom/trankoo/product-detailebsQoMuKExrj/China-USB-To-RS232-Cable.html Has anyone used USB to Serial cables with CDC support? Please advise! Thanks for your help.

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  • Programming for Multi core Processors

    - by Chathuranga Chandrasekara
    As far as I know, the multi-core architecture in a processor does not effect the program. The actual instruction execution is handled in a lower layer. my question is, Given that you have a multicore environment, Can I use any programming practices to utilize the available resources more effectively? How should I change my code to gain more performance in multicore environments?

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  • Which platform can we expect one's complement being used there?

    - by Jian Lin
    For some questions such as checking whether a number is odd or even, I noted the comment, a & 1 won't work when it is a one's complement machine or when the code is ported to a platform that uses one's complement. Since 30 years ago on the Superboard, TRS-80, Apple II, I haven't seen a system with one's complement. Are there popular systems that use one's complement still, or do we have some cell phone or mobile device that uses one's complement?

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  • USB Serial cable with CDC support

    - by Harsha
    Hi All, I bought a USB to Serial cable which claims to be CDC compliant. But the bInterfaceClass value in interface descriptor is 0xFF(which is vendor specific). I was expecting it to be 0x02 (Communications and CDC control). In the device manager, i found that the drivers being loaded are ser2pl.sys and serenum.sys. I had learnt usbser.sys is the windows CDC driver, but it was not loaded for my cable. I am pretty much new to this CDC, so i have following questions 1.Does this indicate that the cable is not CDC compliant 2.Can i make this cable CDC compliant (since CDC is a driver functionality), by loading usbser.sys. If yes how?

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  • How do I work out IEEE 754 64-bit Floating Point Double Precision?

    - by yousef gassar
    enter code herehello i have done it in 32 but i could dont do it in 62bits please i need help I am stuck on this question and need help. I don't know how to work it out. This is the question. Below are two numbers represented in IEEE 754 64-bit Floating Point Double Precision, the bias of the signed exponent is -1023. Any particular real number ‘N’ represented in 64-bit form (i.e. with the following bit fields; 1-bit Sign, 11-bit Exponent, 52-bit Fraction) can be expressed in the form ±1.F2 × 2X by substituting the bit-field values using formula (IV.I): N = (-1) S × 1.F2 × 2(E – 1023) for 0 < E < 2047.........................….(IV.I) Where N= the number represented, S=Sign bit-value, E=Exponent=X +1023, F=Fraction or Mantissa are the values in the 1, 11 and 52-bit fields respectively in the IEEE 754 64-bit FP representation. Using formula (IV.I), express the 64-bit FP representation of each number as: (i) A binary number of the form:- ±1.F2 × 2X (ii) A decimal number of the form:- ±0.F10 × 10Y {limit F10 to 10 decimal places} Sign 0 1 Exponent 1000 0001 001 11 Fraction 1111 0111 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 52 Sign 1 1 Exponent 1000 0000 000 11 Fraction 1001 0010 0001 1111 1011 0101 0100 0100 0100 0010 1101 0001 1000 52 I know I have to use the formula for each of the these but how do I work it out? Is it like this? N = (-1) S × 1.F2 × 2(E – 1023) = 1 x 1.1111 0111 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 x 1000 0001 00111 (-1023)?

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  • Keyboard for programmers

    - by Robert Höglund
    I'm trying to improve my working environment and I'm still searching for that perfect keyboard that practically types bug-free code all by itself. At the moment I'm using a Logitech Wave for my Windows need and an Apple Wireless Keyboard (the one without a numeric keypad) when doing OS X stuff. I'm quite happy with the Logitech Wave but I would prefer one without all the extra multimedia buttons. What I like most about the Apple Wireless Keyboard is that it is very similar to the Macbook's keyboard which for me makes it easier to write code when on my Macbook. What kind of keyboard would you recommend for going all out writing code until your fingers bleed? I have remapped the Caps Lock key to Ctrl which after a while feels really good, until I have to sit at another computer or when someone at work is going to show me something on my computer. Are there other little keyboard tricks that you use to get a little bit more productive? I have looked into switching to Dvorak but I have decided it's not for me.

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  • Can any Palm Pre be used for development?

    - by teedyay
    We're about to start developing software for the Palm, using WebOS. Though an emulator is available for testing, I always feel more confident seeing it run on a physical device as well. I can't find anywhere on Palm's website that tells me whether I can just buy an off-the-shelf Palm Pre and run my app on it, or if I have to buy one with a particular type of contract/ have it unlocked in some way/ whatever. Does anyone know? Have you done this? (Sorry this is barely programming-related, but I couldn't think where else to ask. I'm sure someone has done this and can give me a quick yay or nay. Thanks.) Oh - I'm in the UK, if that makes any difference.

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  • Exporting tasks to 'C using DPI

    - by Alphaneo
    I have an verilog based test-bench, interfaced to 'C source using DPI. Now using DPI I am planning to write my whole firmware. To do this I need 3 things Register Read Register Write Interrupt handler As I understand, register reads and writes are tasks that I need to export from the RTL test-bench. And Interrupt handler (I implemented by importing a function from 'C). I checked most the cadence documentation and found no useful hints. I have also registered with cadence users community but it seems that I cannot ask question till they approve my registration. Just in case someone is aware of this, would appreciate their help.

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  • How are interrupts handled by dual processor machines?

    - by jeffD
    I have an idea of how interrupts are handled by a dual core CPU. I was wondering about how interrupt handling is implemented on a board with more than one physical processor. Is any of the interrupt responsibility determined by the physical board's configuration? Each processor must be able to handle some types of interrupts, like disk I/O. Unless there is some circuitry to manage and dispatch interrupts to the appropriate processor? My guess is that the scheme must be processor neutral, so that any processor and core can run the interrupt handler. If a core is waiting on a disk read, will that core be the one to run the interrupt handler when the disk is ready?

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  • Advice on logic circuits and serial communications

    - by Spencer Ruport
    As far as I understand the serial port so far, transferring data is done over pin 3. As shown here: There are two things that make me uncomfortable about this. The first is that it seems to imply that the two connected devices agree on a signal speed and the second is that even if they are configured to run at the same speed you run into possible synchronization issues... right? Such things can be handled I suppose but it seems like there must be a simpler method. What seems like a better approach to me would be to have one of the serial port pins send a pulse that indicates that the next bit is ready to be stored. So if we're hooking these pins up to a shift register we basically have: (some pulse pin)-clk, tx-d Is this a common practice? Is there some reason not to do this? EDIT Mike shouldn't have deleted his answer. This I2C (2 pin serial) approach seems fairly close to what I did. The serial port doesn't have a clock you're right nobugz but that's basically what I've done. See here: private void SendBytes(byte[] data) { int baudRate = 0; int byteToSend = 0; int bitToSend = 0; byte bitmask = 0; byte[] trigger = new byte[1]; trigger[0] = 0; SerialPort p; try { p = new SerialPort(cmbPorts.Text); } catch { return; } if (!int.TryParse(txtBaudRate.Text, out baudRate)) return; if (baudRate < 100) return; p.BaudRate = baudRate; for (int index = 0; index < data.Length * 8; index++) { byteToSend = (int)(index / 8); bitToSend = index - (byteToSend * 8); bitmask = (byte)System.Math.Pow(2, bitToSend); p.Open(); p.Parity = Parity.Space; p.RtsEnable = (byte)(data[byteToSend] & bitmask) > 0; s = p.BaseStream; s.WriteByte(trigger[0]); p.Close(); } } Before anyone tells me how ugly this is or how I'm destroying my transfer speeds my quick answer is I don't care about that. My point is this seems much much simpler than the method you described in your answer nobugz. And it wouldn't be as ugly if the .Net SerialPort class gave me more control over the pin signals. Are there other serial port APIs that do?

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  • Bare-metal virtualisation for the desktop

    - by Andrew Taylor
    Hi, Does anyone have any knowledge about bare-metal virtualisation products? I'm interested in building a new desktop machine for home, I've been looking at the Intel Quad Core processors and I'd like to put 8GB of RAM in there, but, it got me thinking about making the most out of the available resources. I thought if I could get a good 64bit machine, put some bare-metal virtualisation on, then have a primary system, I'd also be able to bring up some extra virtualised systems as and when I needed. I know most of the bare metal systems are designed for the server market, but, is there anything out there that works well for a desktop. What are the caveats? I presume I won't be able to make the most out of any video cards I could buy, what about just getting a decent screen resolution, will this be a problem? I run a single 24" screen. What about DVD/CD writing, is this possible? I'd like to re-rip my CD collection, I was hoping the quad 64Bit goodness would help me out with the encoding. I currently use a Mac and couldn't go back to windows so that leaves Linux, I was thinking a primary OS of ubuntu. Does this make a difference? Thanks Andrew

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  • Keyboard with normal layout just without numpad? [closed]

    - by Pla
    Do you know any keyboard that does not have a numpad and, at the same time, is not a compact keyboard? I type a lot and I enjoy using standard full sized keyboards. I am annoyed by the presence of the numpad. I've never used it; it just wastes desktop space! All I could find are (even more annoying) compact keyboards. Sadly those keyboards are so compact that cram the arrow keys and the page up/down keys in a very little space. So, does anyone know a keyboard with a normal layout but without the numpad?

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  • Best way to learn how to use FPGAs

    - by Myrrdyn
    In next weeks probably I will have some little FPGA to play with. I have a programmer background (C, C++, Java mostly) and some (very) limited experience in electronics. What are the best tools to know if you want to develop on FPGAs? What are the best languages to study? (what HW description languages?) Have you some examples of little "toy projects" that can be interesting, easy, and "eye-opener"? Thanks in advance. Edit: More details: if I understood correctly, the device I will be playing on will have an ARM core (no idea which one) and a 300k gates FPGA I'm looking specifically at some Linux free sw / open source tools...

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  • Archlinux auto-start after I shutdown my computer

    - by madper
    every one. I'm in a big trouble. My computer (HP ProBook 4230s) has two OS----Archlinux and Win 7. When I use Archlinux, after halt my computer, it will start up after a while without press power. And there is an other thing. My computer's clock will be wrong. Many times I change it in bios, but it wrong again. If I turn off the computer from Win 7, it will never start up untill pressing power bottom. And the clock will be right. I also used ubuntu\debian\mageia, and both of them are fine with my notebook. Is there some configure is wrong with my ArchLinux?

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  • optimal memory layout for read-only/write memory segments.

    - by aaa
    hello. Suppose I have two memory segments (equal size each, approximately 1kb in size) , one is read-only (after initialization), and other is read/write. what is the best layout in memory for such segments in terms of memory performance? one allocation, contiguous segments or two allocations (in general not contiguous). my primary architecture is linux Intel 64-bit. my feeling is former (cache friendlier) case is better. is there circumstances, where second layout is preferred? Thanks

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  • Mouse configurable buttons for programming

    - by DavRob60
    Different mouse models has been already discussed. But all these mouse got configurable buttons. Has a programmer, how do you set them? I use The Microsoft Intellimouse Optical. So set the Left side button to "Copy" and the Right side button to "Paste". I did not set the Wheel click to anything. I'm curious to see if there is any better setup? UPDATE : I'm trying to find some interesting key I could map to my mouse buttons. Copy & paste are the best I' found so far, but i just want to know if there is something that could be more useful when programming.

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  • Windows XP Home Edition SP3 cant recognise PCMIA SD Card

    - by Pozo
    System Specifications: Laptop : Dell Inspiron 6000 OS: Windows Home Edition SP3 SD Adapter: Hagiwara Smart Media Adapter I inserted the card into the slot, windows xp recognises the device, lists the pcmia controller on the device manager list, an entry appears under the IDE ATA/ATAPI category on the device manager as well. However, the device does not show under my computer and the driver does not get assigned a letter number. I checked the system logs from the device manager and there were no logged errors. Checking the Hagiwara support website, the manufacturer indicates that the adapter driver is the same as the windows xp pcmia controller. Checking Dell's website, no specific drivers were listed for that either. General Search on the web indicates that multiple people face similar problems with their SD cards, yet none actually spell out the route issue that causes this. Please let me know if you have any suggestions for further debugging. Thanks in advance

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  • Prevent users from being able to access a webpage via web browser?

    - by Rob
    My friend and I are working on a program. This program is going to submit GET data to our webpage. However, we don't want users accessing the webpage any other way than the program. We can prevent users from sharing the program using HWID authentication, but nothing prevents them from using a packet scanner to get the URL of the webpage. We thought about user-agent authentication, which we will implement, but user-agents can easily be spoofed. So my question is, how can we prevent users from accessing the webpage directly, instead of through the program? Even if you don't have an answer that will completely work, anything that will help deter them would be nice. Currently we will be implementing: HWID Authentication to use the program User-Agent Authentication to access the web page Instant IP Blacklisting to anyone accessing the webpage without the proper User-Agent

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