MIT 6.828 JOS lab3 user environment with challenge: fast system call

[HawxChen]

Hi 眾版友，在下寫了關於lab3 的心得 亦附上相關的github links。

歡迎一同討論 :)

MIT Lab JOS lab3 user environment.

http://hawxchen.blogspot.tw/2012/07/lab3-user-environment.html 

謝謝各位。

[Ben6]

感謝分享，

FAST SYSTEM CALL，讚！

不過我有一個疑問題，如何知道與之前版本比較效能提升？

[way]

 參考這篇??

[The cost of a system call]

http://forum.osdev.org/viewtopic.php?f=1&t=25267 

[tamlo...@gmail.com]

Hello! I want to know how to enter the QEMU  monitor? I have tried Ctrl + a + c, but it works just like Ctrl + c! Thanks!

在 2012年7月24日星期二UTC+8下午11时13分46秒，HawxChen写道：

[way]

Ctrl +Alt+2 

Do you need this?

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[lok tam]

However it seems not to work. After I type " make qemu" to start QEMU, it displays "K>" command prompt. Then I press Ctrl + Alt + 2 . But it doesn't turn into the monitor. 

It is said that "To enter the monitor, press Ctrl-a c in the terminal running QEMU. Press Ctrl-a c again to switch back to the serial console." on the lab tools guide page.

However it doesn't work.

So I can't enter the QEMU monitor now.

Any suggestions?

2013/5/30 way <wayl...@gmail.com>

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[Chunis Deng]

Well, note this: "Press Ctrl-a c in the terminal running Qemu." Which means you can't swith with Qemu as the foreground window. You must switch to the terminal, then "Ctrl-a", then "c" to do the switch.
I've tried it and it works.

2013/6/1 lok tam <tamlo...@gmail.com>

[lok tam]

Yes, it works! Thanks! I misunderstood "Ctrl-a c" before. I pressed Ctrl + a + c simultaneously. Thanks!

2013/6/1 Chunis Deng <chunc...@gmail.com>