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This image demonstrates the same thing, but with ASP. Docker supports containers running with native architecture and in emulation, with native architecture being the default.
This seems obvious but can be confusing when most of the Docker Hub catalog is x64 oriented. We only support running Linux Arm It appears that this may be due to a limitation in QEMU. This image demonstrates the console sample we maintain: mcr. The Apple Silicon and x64 emulation support projects were super important, however, we also improved Arm64 performance generally. This image demonstrates an improvement in zeroing out the contents of stack frames , which is a common operation.
The green line is the new behavior, while the orange line is another less beneficial experiment, both of which improve relative to the baseline, represented by the blue line. For this test, lower is better. NET 6 is better for containers, primarily based on all the improvements discussed in this post, for both Arm64 and x We also made key changes that will help a variety of scenarios. Validate container improvements with.
NET 6 demonstrates some of these improvements being tested together. The Windows container improvements and the new environment variable have also been included in the November. NET Framework 4. NET 6 adds support for Windows process-isolated containers. Process-isolated containers can be thought of as very similar to Linux containers. Linux containers use cgroups and Windows process-isolated containers use Job Objects.
Windows also offer Hyper-V containers, which offers greater isolation through greater virtualization. There are no changes in. NET 6 for Hyper-V containers. The primary value of this change is that Environment. ProcessorCount will now report the correct value with Windows process-isolated containers. If you create a 2-core container on a core machine, Environment. ProcessorCount will return 2. This value is used by various parts of. NET for scaling purposes, including the. Community libraries also rely on this API for scaling.
We recently validated this new capability with a customer, on Windows Containers in production on AKS using a large set of pods. As a result of this change, they are going to move to cheaper Azure configurations, saving them money.
We have heard from users that some applications cannot achieve optimal scaling when Environment. ProcessorCount reports the correct value. If this sounds like the opposite of what you just read for Windows Containers, it kinda-sorta is. ProcessorCount manually. In the typical use case, an application might be configured with 4 cores on a core machine, and scale best in terms of 8 or 16 cores.
This environment variable can be used to enable that scaling. This model might seem strange, where Environment. Container runtimes, by default, are oriented in terms of core equivalents, not actual cores.
That means, when you say you want 4 cores, you get the equivalent CPU time of 4 cores, but your app might in theory run on many more cores, even all 64 cores on a core machine for a short period. That may enable your app to scale better on more than 4 threads continuing with the example , and allocating more could be beneficial. This assumes that the thread allocation is based on the value of Environment.
If you opt to set a higher value, it is likely that your app will use more memory. For some workloads, that is an easy tradeoff. At the very least, it is a new option you can test. Docker also offers a CPU groups feature, where your app is affinitized to specific cores. This feature is not recommended in that scenario since the number of cores an app has access to is concretely defined. We watch Linux distros lifecycle and release plans very closely and try to make the best choices on your behalf.
Debian is the Linux distribution we use for our default Linux images. If you pull the 6. With each new. NET release, we consider whether we should adopt a new Debian version.
As a matter of policy, we do not change the Debian version for our convenience tags, like 6. If we did, some apps would be certain to break. That means, that choosing the Debian version at the start of the release is very important. The Debian and. NET releases are naturally not planned together. When we started. We decided to take a bet on bullseye from the start of the release.
We started releasing bullseye-based container images with. NET 6 Preview 1 and decided not to look back. The bet was that the. NET 6 release would lose the race with the bullseye release. We lost the race but won the bet. That means that. NET 6 users get the best and latest Debian, by default, from day one. We believe that Debian 11 and.
NET 6 will be a great combination for a lot of users. Sorry buster , we hit the bullseye. Newer distro versions include newer major versions of various packages in their package feed and often get CVE fixes faster.
Users are better served by a new distro version. Ubuntu is another Debian-family distro and popular with. We hope to offer same-day support for the new Ubuntu LTS release. Hat tip to Tianon Gravi for maintaining Debian images for the community and helping us when we have questions. As part of. NET 6, we are releasing a. NET 6-based dotnet monitor image that is fully-supported in production. NET Core Linux diagnostics experience.
This is one of the intended scenarios, building on top of dotnet monitor to provide higher-level and higher-value experiences.
NET process. It is easy to get access to all the diagnostic information you want on your desktop machine, however, those same familiar techniques might not work in production using containers, for example. There are two different mechanisms for collection of these diagnostic artifacts:. NET apps that works everywhere you want with any tools you want. NET web server that directly interacts with and exposes data from a diagnostics server in the.
NET runtime. The design of dotnet monitor enables high-performance monitoring in production and secure use to gate access to privileged information. That model communication model is a perfect fit for this use case.
The JSON formatter is now the default console logger in the aspnet. NET 6 container image. The default in. NET 5 was set to the simple console formatter. This change was made in order to have a default configuration that works with automated tools that rely on a machine-readable format like JSON. This change is specific to the aspnet container image. NET versions, as part of our focus on observability. By adding support for OpenTelemetry, your apps can seamlessly interoperate with other OpenTelemetry systems.
Metrics is the. The Metrics APIs are designed explicitly for processing raw measurements, with the intent of producing continuous summaries of those measurements, efficiently and simultaneously. The APIs include the Meter class which can be used to create instrument objects. The OpenTelemetry. We have continued to make key improvements in Windows Forms. NET 6 includes better accessibility for controls, the ability to set an application-wide default font, template updates and others.
You can now set a default font for an application with Application. The following is a minimal Windows Forms application with. NET 6 :. As part of the. We decided to keep the Windows Forms template a bit more traditional, in part because of the need for the [STAThread] attribute to apply to the application entrypoint.
However, there is more a play than immediately meets the eye. Initialize is a source generated API that behind the scenes emits the following calls:. The parameters of these calls are configurable via MSBuild properties in csproj or props files. The Windows Forms designer in Visual Studio is also aware of these properties for now it only reads the default font , and can show you your application as it would look at runtime:.
Windows Forms templates for C have been updated to support the new application bootstrap, global using directives, file-scoped namespaces, and nullable reference types. Now you can build a general-purpose designer for example, a report designer since.
NET 6 has all the missing pieces for designers and designer-related infrastructure. For more information, see this blog post. NET 5, this deployment type was limited to Linux.
You can now publish a single-file binary that is both deployed and launched as a single file, for all supported OSes. Single files apps no longer extract any core runtime assemblies to temporary directories. Apphost contains code to find the runtime, load it, and start your app with that runtime. Superhost still performs some of those tasks but uses a statically linked copy of all the CoreCLR native binaries.
Static linking is the approach we use to enable the single file experience. Native dependencies like that come with a NuGet package are the notable exception to single-file embedding. They are not included in the single file by default. For instance, WPF native dependencies are not part of the superhost, resulting in additional files beside the single file app.
Adding that attribute will also silence all warnings related to single-file in the method, so you can use the warning to propagate warnings upward to your public API. The single-file analyzer is automatically enabled for exe projects when PublishSingleFile is set to true , but you can also enable it for any project by setting EnableSingleFileAnalysis to true. This is helpful if you want to support a library being part of a single file app. NET 5, we added warning for Assembly. Location and a few other APIs which behave differently in single-file bundles.
Single-file bundles now support compression, which can be enabled by setting the property EnableCompressionInSingleFile to true. At runtime, files are decompressed to memory as necessary. Compression can provide huge space savings for some scenarios.
Compression can significantly increase the startup time of the application, especially on Unix platforms. You should test your app after enabling compression to see if the additional startup cost is acceptable. Single-file apps can currently only be debugged using platform debuggers, like WinDBG. We are looking at adding Visual Studio debugging with a later build of Visual Studio Single file apps now satisfy Apple notarization and signing requirements on macOS.
The specific changes relate to the way that we construct single file apps in terms of discrete file layout. Apple started enforcing new requirements for signing and notarization with macOS Catalina. NET to work well in that environment. NET releases. One of the remaining gaps was single-file signing, which is a requirement to distribute a. The team has been working on IL trimming for multiple releases.
NET 6 represents a major step forward on that journey. Trimming has previously been in preview because of the unreliable results for apps which use unannotated reflection. With trim warnings, the experience should now be predictable. Apps without trim warnings should trim correctly and observe no change in behavior when running. Currently, only the core. NET libraries have been fully annotated for trimming, but we hope to see the ecosystem annotate for trimming and become trim compatible.
It can be trimmed with only a few trim warnings, which the crossgen team was able to resolve. It is 80 MB which includes the. NET runtime and all the libraries. We can then try out the now legacy. NET 5 default trim mode, copyused. The result drops to 55 MB. The new. NET 6 default trim mode, link , drops the self-contained file size much further, to 36MB.
We hope that the new link trim mode aligns much better with the expectations for trimming: significant savings and predictable results.
These warnings were previously disabled by default because the warnings were very noisy, largely due to the. NET platform not participating in trimming as a first class scenario. NET libraries so that they produce accurate trim warnings. As a result, we felt it was time to enable trimming warnings by default. The ASP.
We plan to annotate ASP. NET service components next after. NET 6 is released. Some folks in the community have been enjoying these improvements already. Performance-oriented math APIs have been added to System.
Their implementation is hardware accelerated if the underlying hardware supports it. Parsing of BigIntegers from both decimal and hexadecimal strings has been improved. Various System. Complex APIs are now annotated as readonly to ensure that no copy is made for readonly values or values passed by in. This should make it easier to do floating-point bit manipulation when required.
For example, this change should make it simpler to use SIMD instructions with pointers or platform-dependent length types. Credit to Ivan Zlatanov. Credit to Huo Yaoyuan. ToString and. Also, the parser now better supports trailing zeros in the Parse method. This release includes continues on that path and is major step forward on performance, particularly with the serializer source generator.
Note: Apps that used source generation with. NET 6 RC1 or earlier builds should be re-compiled. The backbone of nearly all. NET serializers is reflection. Reflection is a great capability for certain scenarios, but not as the basis of high-performance cloud-native applications which typically de serialize and process a lot of JSON documents.
Reflection is a problem for startup , memory usage, and assembly trimming. The alternative to runtime reflection is compile-time source generation. NET 6, we are including a new source generator as part of System. By default, the JSON source generator emits serialization logic for the given serializable types.
This delivers higher performance than using the existing JsonSerializer methods by generating source code that uses Utf8JsonWriter directly. In short, source generators offer a way of giving you a different implementation at compile-time in order to make the runtime experience better. The source generator can be configured to generate serialization logic for instances of the example JsonMessage type. Note that the class name JsonContext is arbitrary.
You can use whichever class name you want for the generated source. The serializer invocation with this mode could look like the following example. This example provides the best possible performance. The fastest and most optimized source generation mode — based on Utf8JsonWriter — is currently only available for serialization. Similar support for deserialization — based on Utf8JsonReader — may be provided in the future depending on your feedback.
The source generator also emits type-metadata initialization logic that can benefit deserialization as well. To deserialize an instance of JsonMessage using pre-generated type metadata, you can do the following:. The following examples use streams as a representation of any async source of data. The source could be files on a local machine, or results from a database query or web service API call. SerializeAsync has been updated to recognize and provide special handing for IAsyncEnumerable values.
IAsyncEnumerable values are only supported using the asynchronous serialization methods. Attempting to serialize using the synchronous methods will result in a NotSupportedException being thrown. We added the JsonSerializer. DeserializeAsyncEnumerable method for this purpose, as you can see in the following example. This example will deserialize elements on-demand and can be useful when consuming particularly large data streams.
It only supports reading from root-level JSON arrays, although that could potentially be relaxed in the future based on feedback. It must return the final result as a single value, as you can see in the following example.
In this example, the deserializer will have buffered all IAsyncEnumerable contents in memory before returning the deserialized object. This is because the deserializer needs to have consumed the entire JSON value before returning a result. This new API is attractive since it avoids needing strongly-typed serialization contracts, and the DOM is mutable as opposed to the existing JsonDocument type. JsonSerializer System. Json now supports the ability to ignore cycles when serializing an object graph.
The ReferenceHandler. IgnoreCycles option has similar behavior as Newtonsoft. Json ReferenceLoopHandling. One key difference is that the System.
Json implementation replaces reference loops with the null JSON token instead of ignoring the object reference. You can see the behavior of ReferenceHandler. IgnoreCycles in the following example. In this case, the Next property is serialized as null since it otherwise creates a cycle. With source build, you can build the. Let me explain why this project is important. NET Core 1. NET users, this capability is a big deal. Red Hat tells us that. NET has grown to become an important developer platform for their ecosystem.
The gold standard for Linux distros is to build open source code using compilers and toolchains that are part of the distro archive. That works for the. For C code, we use a two-pass build mechanism to satisfy distro requirements. Red Hat builds. This final binary build of the.
That process may be surprising and confusing. Open source distros need to be built by open source tools. There is a higher bar, as a developer platform, to being included in a distro than just using a compatible license.
The source build project has enabled. NET to meet that bar. The deliverable for source build is a source tarball. The source tarball contains all the source for the SDK for a given release.
Red Hat policy requires using a built-from-source toolchain to produce a binary tar ball, which is why they use a two-pass methodology. But this two-pass method is not required for source build itself.
It is common in the Linux ecosystem to have both source and binary packages or tarballs available for a given component. We already had binary tarballs available and now have source tarballs as well.
That makes. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services.
Privacy policy. When building a solution that contains multiple projects, it can be necessary to build certain projects first, to generate code used by other projects. When a project consumes executable code generated by another project, the project that generates the code is referred to as a project dependency of the project that consumes the code.
Such dependency relationships can be defined in the Project Dependencies dialog box. The Project Dependencies option is only available in a solution with more than one project. On the Dependencies tab, select a project from the Project drop-down menu. Visual Studio Setup and Installation. Sign in to vote. But I am getting error on install. Monday, May 5, AM. Hello bangari. So please download the ISO and verify its checksum with this tool: Availability and description of the File Checksum Integrity Verifier utility If it is healthy, please reinstall to see the result.
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