在現代計算系統中，GPU和container扮演著很重要的角色。由於GPU強大的平行計算能力，它可以縮短處理大量數據的時間成本。與VM相比，container對資源的需求較少，因此它可以創建更多instance而且開機時間更短。

然而，應用程序並不總是充分利用GPU，導致問題GPU利用不足的問題。為了提高利用率，必須同時執行多個應用程序。

但是GPU共享並不容易，因為系統還無法控制GPU資源。為了解決這個問題，我們設計了一個軟件解決方案來管理GPU資源。解決方法包括前端和後端。所有應用程序都在前端。後端負責安排應用程序。如果應用程序啟動GPU功能，它將被前端攔截庫攔截並將請求發送到後端。在後端排程並收到執行信號後，前端應用程序才可以恢復執行。通過這種方式，我們可以管理每個容器的使用。

除了提高利用率外，我們還實現了公平。請注意，我們在本文中定義的公平性是控制每個用戶在用戶定義的最大和最小利用率之間的GPU時間使用。利用率表示用戶程序在一個時間間隔內可以使用GPU的時間百分比。

In modern computing system, GPU and containers play an important role. Because of GPU is very powerful of parallel computing, it can shorten the time cost for dealing with big amount of data. Compare to VMs, container has less demand for resources, so it is able to create more instances and has less boot time.

However applications don't always fully utilize GPU, leads to the problem : GPU under-utilization. In order to increase utilization, it has to make multiple application execute concurrently.

But it is not easy to share GPU, because the system is not able to control GPU resources yet. In order to solve this problem, we designed a software solution to manage GPU resources. The solution consists of Frontend and Backend. All applications are in Frontend. Backend is responsible for scheduling the applications. If application launches GPU function, it will be intercepted by Frontend intercepting library and send the request to Backend. After Backend scheduling and received the execution signal, Frontend applications could resume its execution. By this way, we are able to manage the usage of each container.

In addition to increase utilization, we also achieved fairness. Note that fairness we defined in this paper is to control the GPU time usage of each user between user-defined maximum and minimum utilization. The utilization represents the percentage of time that the user program can use GPU in a time interval.

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