shm | Use of golang shared memory
kandi X-RAY | shm Summary
kandi X-RAY | shm Summary
Use of golang shared memory
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Top functions reviewed by kandi - BETA
- size returns the size of v .
- NewMMapMem returns a new MemapMem .
- ReadTLVData reads a tagTL and returns it .
- This is a test function
- Example of shared memory
- WriteReadSHMI returns a readSHM .
- UpdateCtx update context
- StartSubscribe starts subscription .
- CmdAndChangeDirToShow executes a command and print it to os
- Readtlv reads a TLV entry
shm Key Features
shm Examples and Code Snippets
Community Discussions
Trending Discussions on shm
QUESTION
Below is a simple and perfect solution on Windows for IPC with shared memory, without having to use networking / sockets (that have annoying limits on Windows). The only problem is that it's not portable on Linux:
Avoiding the use of the tag parameter will assist in keeping your code portable between Unix and Windows.
Question: is there a simple way built-in in Python, without having a conditional branch "if platform is Windows, if platform is Linux" to have a shared-memory mmap
?
Something like
...ANSWER
Answered 2022-Mar-23 at 08:23The easiest way is to use python with version >=3.8, it has added a built-in abstraction for shared memory, it works on both windows and linux https://docs.python.org/3.10/library/multiprocessing.shared_memory.html
The code will look something like this:
Process #1:
QUESTION
I'm using jenkins and use a mixture of jasmine, selenium and report portal to run automated tests of my website to make sure it is running as expected.
In my .env file I can set which suite I want to test, so it could be all the tests or just a specific portion.
When I run all the tests it looks for the file like so:
...ANSWER
Answered 2022-Mar-23 at 14:36Just add these 2 lines to your onPrepare
QUESTION
I have a map-stype dataset, which is used for instance segmentation tasks. The dataset is very imbalanced, in the sense that some images have only 10 objects while others have up to 1200.
How can I limit the number of objects per batch?
A minimal reproducible example is:
...ANSWER
Answered 2022-Mar-17 at 19:22If what you are trying to solve really is:
QUESTION
Trying to debug an Azure functions project. On the mac clicking F5 and starting the debug.
And the output is this :
...ANSWER
Answered 2021-Jul-26 at 13:27Solution was adding --verbose mode and see the logs. The problem was that azure didn't support node version 15. Downgraded nodejs to version 13.12.0 and it worked.
QUESTION
I have Nginx cache server built on Ubuntu 18 and with docker image nginx:1.19.10-alpine.
Ubuntu 18 disk usage details given below for reference
...ANSWER
Answered 2022-Jan-27 at 02:15You can try to configure the temporary cache directory
QUESTION
hi im using chrome driver but i cant fix this error
mycode:
...ANSWER
Answered 2021-Oct-06 at 05:14If you are using Selenium with Python then add these extra options into your Selenium code-
QUESTION
I have to edit /etc/fstab to change mounting options for /dev/shm parameter.
source line is :
...ANSWER
Answered 2022-Jan-02 at 11:54With GNU awk
. If second field contains /dev/shm
then append ,noexec
to fourth field.
QUESTION
I'm trying to run 2 chrome browser instances with selenium webdriver library. However Even if these two browsers were initiated separately and are in separate threads, the code controls and manipulates only one browser.
The code for creating a chrome browser and perform the testing
...ANSWER
Answered 2021-Dec-31 at 14:57If you launch Chrome with different arguments, it launches a new instance. So in this case making --remote-debugging-port
to be in different port will make the driver launch a new instance instead of using the existing instance.
QUESTION
I've started working with Puppeteer and for some reason I cannot get it to work on my box. This error seems to be a common problem (SO1, SO2) but all of the solutions do not solve this error for me. I have tested it with a clean node package (see reproduction) and I have taken the example from the official Puppeteer 'Getting started' webpage.
How can I resolve this error?
Versions and hardware ...ANSWER
Answered 2021-Nov-24 at 18:42There's too much for me to put this in a comment, so I will summarize here. Maybe it will help you, or someone else. I should also mention this is for RHEL EC2 instances behind a corporate proxy (not Arch Linux), but I still feel like it may help. I had to do the following to get puppeteer working. This is straight from my docs, but I had to hand-jam the contents because my docs are on an intranet.
I had to install all of these libraries manually. I also don't know what the Arch Linux equivalents are. Some are duplicates from your question, but I don't think they all are:
pango
libXcomposite
libXcursor
libXdamage
libXext
libXi
libXtst
cups-libs
libXScrnSaver
libXrandr
GConf2
alsa-lib
atk
gtk3
ipa-gothic-fonts
xorg-x11-fonts-100dpi
xorg-x11-fonts-75dpi
xorg-x11-utils
xorg-x11-fonts-cyrillic
xorg-x11-fonts-Type1
xorg-x11-fonts-misc
liberation-mono-fonts
liberation-narrow-fonts
liberation-narrow-fonts
liberation-sans-fonts
liberation-serif-fonts
glib2
If Arch Linux uses SELinux, you may also have to run this:
setsebool -P unconfirmed_chrome_sandbox_transition 0
It is also worth adding dumpio: true
to your options to debug. Should give you a more detailed output from puppeteer, instead of the generic error. As I mentioned in my comment. I have this option ignoreDefaultArgs: ['--disable-extensions']
. I can't tell you why because I don't remember. I think it is related to this issue, but also could be related to my corporate proxy.
QUESTION
I ran sleep 1
under strace -tt
(which reports timestamps of all syscalls) in host and QEMU guest, and noticed that the time required to reach a certain syscall (clock_nanosleep
) is almost twice larger in case of the guest:
- 1.813 ms on the host vs
- 3.396 ms in the guest.
Here is full host strace -tt sleep 1 and here is full QEMU strace -tt sleep 1.
Below are excerpts where you can already see the difference:
Host:
...ANSWER
Answered 2021-Nov-06 at 22:11That's expected, considering the way strace
is implemented, i.e. via the ptrace(2)
system call: every time the traced process performs a system call or gets a signal, the process is forcefully stopped and the control is passed to the tracing process, which in the case of strace
does all the unpacking & printing synchronously, i.e. while keeping the traced process stopped. That's the kind of path which increases any emulation overhead exponentially.
It would be instructive to strace strace
itself -- you will see that does not let the traced process continue (with ptrace(PTRACE_SYSCALL, ...)
) until it has processed & written out everything related to the current system call.
Notice that in order to run a "trivial" sleep 1
command, the dynamic linker will perform a couple dozen system calls before even getting to the entry point of the sleep
binary.
I don't think that optimizing strace
is worth spending time on; if you were planning to run strace as an auditing instead of a debugging tool (by running production tasks under strace
or similar), you should reconsider your designs ;-)
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