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Chrome奇怪的“gpu首选项”

gpu encoding google-chrome

Tony Vijay · 技术社区 · 7 年前

ps -ef chrome :

501   536   493   0 äº11ä¸å ??       13:11.48 /Applications/Google Chrome.app/Contents/Versions/69.0.3497.100/Google Chrome Helper.app/Contents/MacOS/Google Chrome Helper --type=gpu-process --field-trial-handle=3535656472344341962,3817030915272013891,131072 --gpu-preferences=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 --service-request-channel-token=17030867567105907743

出于好奇,我发现 source of chromium

namespace gl {
// On dual-GPU systems, expresses a preference for using the integrated
// or discrete GPU. On systems that have dual-GPU support (see
// GpuDataManagerImpl), resource sharing only works between
// contexts that are created with the same GPU preference.
//
// This API will likely need to be adjusted as the functionality is
// implemented on more operating systems.
enum GpuPreference {
  GpuPreferenceNone,
  PreferIntegratedGpu,
  PreferDiscreteGpu,
  GpuPreferenceLast = PreferDiscreteGpu
};
}  // namespace gl

那么,这是参数吗( KAAAA.... GPU

1 回复 | 直到 7 年前

Josh Lee ZZ Coder 7 年前

任何时候你看到一个编码 AAAA 在它里面,你可以打赌它是一个二进制的Base64编码,里面有很多空值。

>>> a=b'KAAAAAAAAAQAAAAAAAAAAAGAAAAAAAAAAAAAIAAAAAAAAADgBAAAmAAAAM=='
>>> base64.b64decode(a).hex()
'2800000000000004000000000000000001800000000000000000002000000000000000e004000098000000'

对应于此接口: https://cs.chromium.org/chromium/src/gpu/ipc/common/gpu_preferences.mojom

wire格式似乎没有太多的文档记录,所以如果您想解释这个值,最好检查chromium树并构建绑定生成器。 https://chromium.googlesource.com/chromium/src/+/master/mojo/public/tools/bindings/README.md