Rseq | Restartable Sequences : a userspace implementation | GPU library

 by   facebookarchive C++ Version: Current License: Non-SPDX

kandi X-RAY | Rseq Summary

kandi X-RAY | Rseq Summary

Rseq is a C++ library typically used in Hardware, GPU applications. Rseq has no bugs, it has no vulnerabilities and it has low support. However Rseq has a Non-SPDX License. You can download it from GitHub.

Rseq is a userspace take on the proposed kernel restartable sequences API, and provides and mechanism to perform efficient per-cpu operations. This isn't intended to be a long-running project. Instead, its goal is to allow userland experiments with rseq (without having to recompile the kernel), to collect data as to how useful it would be.
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            kandi-support Support

              Rseq has a low active ecosystem.
              It has 28 star(s) with 11 fork(s). There are 5 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              Rseq has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Rseq is current.

            kandi-Quality Quality

              Rseq has no bugs reported.

            kandi-Security Security

              Rseq has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              Rseq has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              Rseq releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            Rseq Key Features

            No Key Features are available at this moment for Rseq.

            Rseq Examples and Code Snippets

            No Code Snippets are available at this moment for Rseq.

            Community Discussions

            QUESTION

            Adding a Progress Bar to Parallel Code (Haskell)
            Asked 2021-Apr-02 at 20:39

            In Haskell, I have a list that can be evaluated in parallel. Each individual evaluation doesn't take that long, but there are many of them (1 million, for example). I'm using the following library. The plan is split the list into chunks and run them in parallel. I have something like the following that works:

            ...

            ANSWER

            Answered 2021-Apr-02 at 20:39

            Unfortunately, I believe GHC currently does not expose any functionality for observing (in IO, obviously) the evaluation progress of parallel computations. You will need to use concurrency in the form of forkIO and friends (or a library that wraps them like the async package) instead.

            Source https://stackoverflow.com/questions/66923101

            QUESTION

            Removing the o coefficients along with their power and variable of a polynomial term in clojure
            Asked 2020-Nov-15 at 21:13

            I created a polynomial function that returns the string based representation of the terms of polynomial added together, however i was having difficulties in removing terms from the string that contain the 0 coefficient and its giving me a different output

            Below is my function:

            ...

            ANSWER

            Answered 2020-Nov-15 at 21:13

            i would propose gathering all the polynom print parts altogether into a flat collection, and then print all of them to string. Could look like this:

            Source https://stackoverflow.com/questions/64848293

            QUESTION

            Why is their a gap in syscall numbering between 334 and 424 in the x86-64 Linux kernel source?
            Asked 2020-Sep-02 at 20:40

            In arch/x86/entry/syscalls/syscall_64.tbl syscalls are numbered from 0 to 334 and then there is a gap before the syscall numbers resume at 424. The relevant portion of the source is shown below:

            ...

            ANSWER

            Answered 2020-Sep-02 at 20:40

            The purpose seems to be to sync up syscall numbers across architectures (source).

            Viewing the git blame for the commented line in that file, one can find this commit message:

            arch: add split IPC system calls where needed

            The IPC system call handling is highly inconsistent across architectures, some use sys_ipc, some use separate calls, and some use both. We also have some architectures that require passing IPC_64 in the flags, and others that set it implicitly.

            For the addition of a y2038 safe semtimedop() system call, I chose to only support the separate entry points, but that requires first supporting the regular ones with their own syscall numbers.

            The IPC_64 is now implied by the new semctl/shmctl/msgctl system calls even on the architectures that require passing it with the ipc() multiplexer.

            I'm not adding the new semtimedop() or semop() on 32-bit architectures, those will get implemented using the new semtimedop_time64() version that gets added along with the other time64 calls. Three 64-bit architectures (powerpc, s390 and sparc) get semtimedop().

            Source https://stackoverflow.com/questions/63713056

            QUESTION

            Insert >1 rows of data from a table to another TempTable
            Asked 2019-Nov-07 at 05:19

            Since the result returns more than 1 row, it is not able to INSERT INTO the @TEMP_ROW table. I want all the rows to be inserted into the @TEMP_ROW table. Can I use a while loop? If yes, how? Or any other method?

            ...

            ANSWER

            Answered 2019-Nov-07 at 04:25

            Try insert from select syntax.

            Source https://stackoverflow.com/questions/58741935

            QUESTION

            How to pass parameters to Linux system call?
            Asked 2019-Oct-25 at 10:54

            I'm a college student studying OS.

            I'm trying to add my own system call in Linux kernel, and something is going wrong.

            My environment is stated below:

            • Linux Kernel v.4.19.1
            • 64-bit Ubuntu LTS 18.04.1 with Intel Core i5-4210M CPU on Oracle VirtualBox 5.2.18
            • 64-bit Windows 10 Home 1803 as a host machine


            Since I'm working on x86_64 machine, I started with arch/x86/entry/syscalls/syscall_64.tbl. In Linux kernel v.4.19.1, the last entry is

            ...

            ANSWER

            Answered 2018-Dec-12 at 05:39

            You need to tell the build system that your system call requires 2 arguments and that they are of type int. This is so that the scripts that are part of the build system will generate appropriate wrappers for casting the arguments into the type you require. Instead of defining the actual handler like you did, you should use -

            Source https://stackoverflow.com/questions/53735886

            QUESTION

            PRACK Request using SIPSorcery
            Asked 2019-Oct-22 at 21:00

            how to send a message PRACK?

            I give so:

            ...

            ANSWER

            Answered 2019-Oct-22 at 21:00

            PRACK's aren't supported in the SIPSorcery SIP implementation (they're not part of the main specification and aren't very common).

            The approach would be to use the uac.ServerInviteTransaction to generate the PRACK request based on the GetInTransactionACKRequest.

            A better place for this question would be on github and if you still have the need I can add it relatively quickly.

            Source https://stackoverflow.com/questions/58117975

            QUESTION

            How to foward predicate parameters over akka messages
            Asked 2018-Nov-06 at 05:13

            I need help in forwarding a predicate parameter in Akka messages. I create the predicate when I call a case class in Master. I need to forward this parameter to Worker node. Here is a part of my implementation.

            ...

            ANSWER

            Answered 2018-Nov-06 at 05:13

            Solved the problem by creating a type Predicate [T] = {String, T => Boolean}.

            Then modified the code as:

            Source https://stackoverflow.com/questions/53163223

            QUESTION

            Cabal seems unable to build executable that runs in parallel
            Asked 2018-Jul-16 at 05:24

            I'm currently working through the book 'Parallel and Concurrent Programming in Haskell', and I'm trying to get one of the first examples to run on my machine, it is effectively some sudoku solver algorithm that the book shows how to use haskell to divide solving multiple iterations of the solver across two cores. Here is the code:

            ...

            ANSWER

            Answered 2018-Jul-16 at 05:24

            QUESTION

            Haskell - What's up with parMap?
            Asked 2017-Dec-25 at 16:09

            I've run some tests:

            ...

            ANSWER

            Answered 2017-Dec-25 at 16:09

            By default, GHC runs all programs using a single OS thread, even with -threaded enabled. Note the text "using -N1" in your output - it indicates that the program is being run with 1 physical thread.

            In short: pass e.g. +RTS -N8 to your program. For documentation of this flag, see here.

            In a broad sense, this is due to the distinction between parallelism and concurrency. Here are some SO questions which try to explain the difference. The difference can be summarized as:

            • parrallelism: a task subdivided into similar chunks to run simultaneously on separate cores/CPUs at some point in time; for increased speed

            • concurrency: several tasks being executed conceptually independently such that their execution times overlap, whether on the same thread through time slicing or on separate cores/CPUs; usually utilizing shared resources more efficiently

            However, these definitions are somewhat contentious; sometimes the two have opposite meanings, and sometimes they are used interchangeably. However, for the purpose of understanding this problem (why you must pass another flag in addition to -threaded to make a 'parallel' program actually run in parallel) I believe they are useful definitions.

            Source https://stackoverflow.com/questions/47956309

            QUESTION

            parTraversable not creating any sparks
            Asked 2017-Oct-06 at 21:33

            When I run this program with -s:

            ...

            ANSWER

            Answered 2017-Oct-06 at 21:33

            I can reproduce your behaviour (ghc-8.2.1, parallel-3.2.1.1).

            Later on down the Strategies.hs is a RULES pragma that special-cases parList rseq. I guess it is a bug that it has different behaviour to parTraversable (I don't know enough about the internals to be sure where the bug lies). I'd suggest filing a ticket at the parallel issue tracker: https://github.com/haskell/parallel/issues

            Here is the code in question, starting at line 505 of the file:

            Source https://stackoverflow.com/questions/46613397

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install Rseq

            You can download it from GitHub.

            Support

            Rseq.md contains a more thorough description. Reading the comments in rseq/Rseq.h should give a working understanding of the API.
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