kandi X-RAY | hyper Summary
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I am writing a model Series class (kinda like the one in pandas) - and it should be both Positional and Associative....
ANSWERAnswered 2022-Mar-31 at 13:17
First, an MRE with an emphasis on the M1:
When I update my windows to windows 11, I notice about when I run the android emulator for my Xamarin project, it freeze and said not responding.
I try these items below but won’t fix my problem :
- reduce ram size of emulator device
- reduce the resolution of emulator device
- reinstall Android SDK
- reinstall visual studio My Virtual Machine Platform and Hyper-V are enabled in my windows features.
My emulator detail is :
OS: Android 12
Resolution : 1080x2340 pixels
Google Services: true
ANSWERAnswered 2022-Mar-17 at 14:24
For the AMD process, we need to make clear to the visual studio that we use the AMD process and it should change the emulator behavior to our process.
First of all like I said we need to make sure the
Virtual Machine Platform and
Hyper-V are enabled because it’s necessary to run an android emulator in a visual studio.
Second, We need to make sure that
Android Emulator Hypervisor Driver for AMD Processors is selected in the visual studio.
Android Emulator Hypervisor Driver for the AMD Processors:
Emits a machine instruction to signal the processor that it is running in a busy-wait spin-loop (“spin lock”).
Upon receiving the spin-loop signal the processor can optimize its behavior by, for example, saving power or switching hyper-threads.
_mm_pause, A.K.A. the
pauseintrinsic on x86
yieldinstruction on 32-bit arm
ISB SYon 64-bit arm (aarch64)
That last one has got my head spinning a little bit (😉). I thought that
ISB is a lengthy operation, which would mean that, if used within a spin lock, the thread lags a bit in trying to detect whether the lock is open again, but otherwise there's hardly any profit to it.
What are the advantages of using
ISB SY instead of a
NOP in a spin loop on aarch64?
ANSWERAnswered 2022-Jan-23 at 14:13
I had to dig into the Rust repository history to get to this answer:
yield has been replaced with
On arm64 we have seen on several databases that ISB (instruction synchronization barrier) is better to use than yield in a spin loop. The yield instruction is a nop. The isb instruction puts the processor to sleep for some short time. isb is a good equivalent to the pause instruction on x86.
So essentially, it uses the time it takes for an
ISB to complete to pause the processor, so that it wastes less power.
Peter Cordes explained it nicely in one of his comments:
ISB SY doesn't stall for long, just saves a bit of power vs. spamming loads in a tight loop.
I am using thread library in different machines (including Linux and Windows, and also both Intel and AMD CPUs and with clang++, GNU and MSVC). in all of them, std::thread::hardware_concurrency() returns what is called Logical Processors in Windows or the maximum number of threads including the hyper threads, however in a new machine which has AMD Ryzen threadripper 3990x CPU it returns only the number of cores which is half of the maximum number of threads (64 instead of 128). I read in the c++ reference that the return value depends on the implementation and it's only a hint, but my question is that how can I find the implementation or is there an upper bound for the number of threads that this function returns or not. Since I was getting a similar behavior across all machines that I was testing I have no clue what is the reason for this different behavior....
ANSWERAnswered 2022-Jan-13 at 23:49
The idea of
std::thread::hardware_concurrency is to tell you what kind of concurrency
std::threads can experience. Since
std::thread can only put threads into your default processor group, you will get the number of logical processors in your default processor group. This is not going to be greater than 64 on Windows unless you go to extreme measures.
"[A] system with 128 logical processors would have two processor groups with 64 processors in each group[.]"
"An application that requires the use of multiple groups so that it can run on more than 64 processors must explicitly determine where to run its threads and is responsible for setting the threads' processor affinities to the desired groups."
- Windows 11 Home 21H2 22000.132
- AMD Ryzen 5900X
- Android studio lastest build (also tried with latest beta)
Problem: As soon as I install WSL2, the emulator stops working. It's giving the following error message:...
ANSWERAnswered 2021-Aug-19 at 12:54
I found and tested in shorter toggle mechanism.
The configuration for Windows Feature:
Windows Subsystem for Linuxis installed.
Windows Hypervisor Platformis installed.
If you need the Emulator, you only need to turn off Hypervisor + Restart. Run:
bcdedit /set hypervisorlaunchtype off
If you need the Docker back, you can run the hypervisor hence disabling Emulator. Run:
bcdedit /set hypervisorlaunchtype auto
You need to restart after setting Hypervisor
You cannot run both at the same time. Another forum worth checking in
How about running docker? in my older answer below.
I think I solved this issue, tested to run from CMD / Android Studio and ran perfectly as before installing WSL. There are several step we go:Configuring Windows Feature:
Windows Subsystem for Linux
Windows Hypervisor Platform
Here is my current setup:Reverting AVD setup
I know after removing there are some odds because the AVD still get the same error as before and expected to get into WSL. I stumbled and found something when ran:
That command will check the current accel. It explains that the Hypervisor need to be set off and give specific help:
bcdedit /set hypervisorlaunchtype off.
After running the bcdedit, I restarted and all is reverted. Now I can run emulator both from CMD and Android Studio perfectly.How about running docker?
Sad truth, yeah you cannot run both pararel. There are several workaround in this forum:
Several option ranging from changing emulator, add & remove docker when in need using above step, created nested vm, etc. My personal choice right now is using another Emulator for the time being and removed docker for the latter.
When i do this command
kubectl get pods --all-namespaces I get this
Unable to connect to the server: dial tcp [::1]:8080: connectex: No connection could be made because the target machine actively refused it.
All of my pods are running and ready 1/1, but when I use this
microk8s kubectl get service -n kube-system I get
ANSWERAnswered 2021-Dec-27 at 08:21
Posting answer from comments for better visibility: Problem solved by reinstalling multipass and microk8s. Now it works.
When creating a new VM in Hyper-V, to keep things organized, I use a particular naming convention when creating the associated VHDX files. The naming convention is the VMs FQDN followed by the SCSI controller attachment point followed by what the name of the drive is called or used for inside of the VM. I encapsulate the SCSI and Name parameters inside smooth and square brackets respectively. I find this tends to make things a little bit easier from a human perspective to match the VHDX files in Hyper-V to what the VM sees internally when needing to do maintenance tasks. It has also helped with scripting in the past. An example file name would look as follows......
ANSWERAnswered 2021-Dec-20 at 04:37
A design limitation of
Get-VHDprevents it from properly recognizing VHD paths that contain
](see bottom section for details).
Workaround: Use short (8.3) file paths assuming the file-system supports them:
Suppose I'm running a (power)shell on a Windows machine.
Is there a one-liner I could use to get:
- The number of physical processor cores and/or
- The max number of in-flight threads, i.e. cores * hyper-threading factor?
Note: I want just a single number as the command output, not any headers or text....
ANSWERAnswered 2021-Nov-06 at 21:33
To find out processor number of cores using PowerShell
Get-WmiObject –class Win32_processor | ft NumberOfCores,NumberOfLogicalProcessors
To find out what is the number of threads running:
(Get-Process|Select-Object -ExpandProperty Threads).Count
I am fetching a list of questions from the Question.js file to Home.js
How can I change the answer border color when the user clicks on that. I want to make green if the user clicks on the right answer and red if the user clicks on the wrong answer.
If the user clicks on the wrong answer then it should show the right answer by making the background green and the rest all should become the red border.
ANSWERAnswered 2021-Nov-28 at 05:49
I would recommend to create separate component called
Question to avoid working with arrays of data and put state login inside. But if this is not possible I would do it this way:
I''m trying to use XGBoost for a particular dataset that contains around 500,000 observations and 10 features. I'm trying to do some hyperparameter tuning with
RandomizedSeachCV, and the performance of the model with the best parameters is worse than the one of the model with the default parameters.
Model with default parameters:...
ANSWERAnswered 2021-Nov-03 at 18:56
As stated in the XGBoost Docs
Parameter tuning is a dark art in machine learning, the optimal parameters of a model can depend on many scenarios.
You asked for suggestions for your specific scenario, so here are some of mine.
- Drop the dimensions
boosterfrom your hyperparameter search space. You probably want to go with the default booster 'gbtree'. If you are interested in the performance of a linear model you could just try linear or ridge regression, but don't bother with it during your XGBoost parameter tuning.
- Drop the dimension
base_scorefrom your hyperparameter search space. This should not have much of an effect with sufficiently many boosting iterations (see XGB parameter docs).
- Currently you have 3200 hyperparameter combinations in your grid. Expecting to find a good one by looking at 50 random ones might be a bit too optimistic. After dropping the
base_scoredimensions you would be down to
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