String[] convertGpuCards(String[] gpuStr) {
        if (gpuStr != null && gpuStr.length > 0) {
            String[] gpuList = new String[gpuStr.length];
            int min = Integer.MIN_VALUE;
            for (String s : gpuStr) {
                int id = Integer.parseInt(s);
                if (id < min) {
                    min = id;
                }
            }
            if (min <= 0) {
                return gpuStr;
            } else {
                for (int i = 0; i < gpuStr.length; i++) {
                    gpuList[i] = String.valueOf(Integer.parseInt(gpuStr[i]) - min);
                }
                return gpuList;
            }
        }
        return gpuStr;
    }
Return the number of cpu vcores assigned

@return
core/src/main/java/net/qihoo/hbox/container/ContainerReporter.java