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Kernel-mode and user-mode web serve
Kernel-mode and user-mode web servers
A web server can be either implemented into the OS kernel, or in user space (like other regular applications).
An in-kernel web server (like Microsoft IIS on Windows or TUX on GNU/Linux) will usually work faster, because, as part of the system, it can directly use all the hardware resources it needs, such as non-paged memory, CPU time-slices, network adapters, or buffers.
Web servers that run in user-mode have to ask the system for permission to use more memory or more CPU resources. Not only do these requests to the kernel take time, but they are not always satisfied because the system reserves resources for its own usage and has the responsibility to share hardware resources with all the other running applications. Executing in user mode can also mean useless buffer copies which are another handicap for user-mode web servers.
A web server can be either implemented into the OS kernel, or in user space (like other regular applications).
An in-kernel web server (like Microsoft IIS on Windows or TUX on GNU/Linux) will usually work faster, because, as part of the system, it can directly use all the hardware resources it needs, such as non-paged memory, CPU time-slices, network adapters, or buffers.
Web servers that run in user-mode have to ask the system for permission to use more memory or more CPU resources. Not only do these requests to the kernel take time, but they are not always satisfied because the system reserves resources for its own usage and has the responsibility to share hardware resources with all the other running applications. Executing in user mode can also mean useless buffer copies which are another handicap for user-mode web servers.
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Kernel-mode and user-mode web serversA web server can be either implemented into the OS kernel, or in user space (like other regular applications).An in-kernel web server (like Microsoft IIS on Windows or TUX on GNU/Linux) will usually work faster, because, as part of the system, it can directly use all the hardware resources it needs, such as non-paged memory, CPU time-slices, network adapters, or buffers.Web servers that run in user-mode have to ask the system for permission to use more memory or more CPU resources. Not only do these requests to the kernel take time, but they are not always satisfied because the system reserves resources for its own usage and has the responsibility to share hardware resources with all the other running applications. Executing in user mode can also mean useless buffer copies which are another handicap for user-mode web servers.
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Kernel-mode dan user-mode server web Sebuah server web dapat baik diimplementasikan ke dalam kernel OS, atau di ruang pengguna (seperti aplikasi biasa lainnya). Sebuah web server yang (seperti Microsoft IIS pada Windows atau TUX pada GNU / Linux di-kernel ) biasanya akan bekerja lebih cepat, karena, sebagai bagian dari sistem, dapat langsung menggunakan semua sumber daya perangkat keras yang dibutuhkan, seperti non-paged memori, CPU waktu-iris, adapter jaringan, atau buffer. Web server yang berjalan di user- Modus harus meminta sistem izin untuk menggunakan lebih banyak memori atau lebih sumber daya CPU. Tidak hanya melakukan permintaan ini ke kernel memakan waktu, tetapi mereka tidak selalu puas karena sumber daya cadangan sistem untuk penggunaan sendiri dan memiliki tanggung jawab untuk berbagi sumber daya perangkat keras dengan semua aplikasi yang berjalan lainnya. Pelaksana dalam modus pengguna juga dapat berarti salinan penyangga tidak berguna yang cacat lain untuk user-mode server web.
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