xsk | Compatible environment for SAP HANA Extended Application | Learning library

 by   SAP Java Version: v0.15.1 License: Apache-2.0

kandi X-RAY | xsk Summary

kandi X-RAY | xsk Summary

xsk is a Java library typically used in Tutorial, Learning applications. xsk has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

Compatible environment for SAP HANA Extended Application Services (XS) based applications outside of SAP HANA instance running in a container deployed on Kubernetes

            kandi-support Support

              xsk has a low active ecosystem.
              It has 26 star(s) with 29 fork(s). There are 14 watchers for this library.
              It had no major release in the last 12 months.
              There are 247 open issues and 626 have been closed. On average issues are closed in 101 days. There are 18 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of xsk is v0.15.1

            kandi-Quality Quality

              xsk has no bugs reported.

            kandi-Security Security

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

            kandi-License License

              xsk is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              xsk releases are available to install and integrate.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed xsk and discovered the below as its top functions. This is intended to give you an instant insight into xsk implemented functionality, and help decide if they suit your requirements.
            • Replies if the given path is valid
            • Register a predelivered table function
            • Register a predelivered procedure
            • Register a predelivered schema file
            • 12
            • Matches an attribute_name
            • Matches an attribute_definition
            • Execute the alter entity
            • Execute alter - table
            • Create the CreateTable
            • Execute the drop table
            • Init type system
            • Filter resources
            • Execute the Create View
            • Execute the Create Table Type
            • Gets all imported records from a table
            • Synchronizes the XSK DataStructures
            • Execute create synonym statement
            • Creates an XSKODataModel from raw content
            • Exit the object model
            • Matches SQL + command
            • Matches a variable name
            • Matches a Type_body
            • Export an entity into a XSDATA entity
            • Executes the drop table
            • Returns a string representation of this library
            Get all kandi verified functions for this library.

            xsk Key Features

            No Key Features are available at this moment for xsk.

            xsk Examples and Code Snippets

            No Code Snippets are available at this moment for xsk.

            Community Discussions


            AF-XDP: Implement Shared Umem sockets
            Asked 2020-Mar-12 at 16:24

            I want to implement XDP_SHARED_UMEM: https://www.kernel.org/doc/html/latest/networking/af_xdp.html#xdp-shared-umem-bind-flag

            The libbpf library function xsk_socket__create (https://github.com/libbpf/libbpf/blob/master/src/xsk.c) checks the xsk_umem->refcount value. In case it is greater than 1, the XDP_SHARED_UMEM option of a struct sockaddr_xdp is set.

            So as far as I understand correctly, I "just" need to pass the original umem struct of the socket I want to share the umem with and the rest is done by libbpf.

            The way I tried to do it was to let the first process copy its umem-struct into a shared-memory area where the second process could load it from. But because struct xsk_umem is defined in xsk.c it is hidden from the user and I am not able to do something like this:

            memcpy(shdm_ptr, umem, sizeof(struct xsk_umem))

            I don't know how they expect someone to use the shared umem feature?



            Answered 2020-Mar-12 at 16:24

            So this was discussed on the xdp-newbies mailing list. Reporting here for the record.

            It is not recommended to go with a multi-process setup as you are trying to do. Björn says:

            Note that if you'd like to do a multi-process setup with shared umem, you: need to have a control process that manages the fill/completion rings, and synchronize between the processes, OR re-mmap the fill/completetion ring from the socket owning the umem in multiple processes and synchronize the access to them. Neither is pleasant.

            Honestly, not a setup I'd recommend.

            And he adds:

            Just for completeness; To setup shared umem:

            1. create socket 0 and register the umem to this.
            2. mmap the fr/cr using socket 0
            3. create socket 1, 2, n and refer to socket 0 for the umem.

            So, in a multiprocess solution step 3 would be done in separate processes, and step 2 depending on your application. You'd need to pass socket 0 to the other processes and share the umem memory from the process where socket 0 was created. This is pretty much a threaded solution, given all the shared state.

            I advice not taking this path.

            (Credits to Björn.)

            Source https://stackoverflow.com/questions/60615240


            AF_XDP: Set `SO_TIMESTAMP` not supported for `SO_XDP`: Protocol not available
            Asked 2020-Mar-09 at 09:03

            Why is setting SO_TIMESTAMP not supported for an AF_XDP socket? The user manual of my driver (mlnx 5.0) states that

            Incoming packets are time-stamped before they are distributed on the PCI depending on the congestion in the PCI buffers.

            To my knowledge, before distributed on the PCI means that there is no Linux Kernel involved (yet) - right?

            I tried setting it like this:



            Answered 2020-Mar-09 at 09:03

            There is no technical reason on why it is not implemented.

            Indeed, it looks like it is on the To-Do list of the xdp development team.

            Cite from here:

            Important medium-term tasks


            Metadata from hardware

            There are various hardware metadata items that would be useful for XDP programs to access, to reduce the amount of processing that needs to happen in eBPF. These include:

            • Checksum
            • Hash value
            • Flow designator
            • Higher-level protocol header offsets
            • Timestamps

            It looks like this is on the To-Do since June 2019, so it probably doesn't have top priority, otherwise it would already be implemented.

            Source https://stackoverflow.com/questions/60596764


            AF-XDP: How do I get `ctx->data_meta` from kernel into user-space?
            Asked 2020-Mar-03 at 11:09

            I want to measure packet latency for my AF-XDP program. I was looking at this reference: https://github.com/xdp-project/xdp-project/blob/master/areas/arm64/xdp_for_tsn.org

            and adapted it to this:



            Answered 2020-Mar-03 at 11:09

            The snippet you used is described in the tutorial as pseudo-code, it is not a complete and functional example. Let's have a look at the verifier log:

            Source https://stackoverflow.com/questions/60487925


            XSLT save node attribute value into variable
            Asked 2018-Apr-19 at 11:31

            How can I store attribute value in a variable?

            XML example:



            Answered 2018-Apr-19 at 11:31


            error C2071 Illegal storage class, definig enum type in C
            Asked 2017-May-23 at 08:04

            I am trying to define an enum struct in C as following. I get the error ** Illegal storage class**.



            Answered 2017-May-23 at 08:04

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


            No vulnerabilities reported

            Install xsk

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