Use TimeServer by Group Components Questions
I got an problem when I use TimeServer with Group Components. I wish more than one component in the same Group Components, that can use TimeServer. While the cdl only have one ep for all components in the Group to communicate to TimeServer with an badge value that not equal to zero. And TimeServer must to distinguish requester by the badge, so only one component can receive TimeServer's response. How can I resolve this problem?
On Fri, Dec 3, 2021 at 2:51 PM <15852538526@139.com> wrote:
I got an problem when I use TimeServer with Group Components. I wish more than one component in the same Group Components, that can use TimeServer. While the cdl only have one ep for all components in the Group to communicate to TimeServer with an badge value that not equal to zero. And TimeServer must to distinguish requester by the badge, so only one component can receive TimeServer's response. How can I resolve this problem?
The TimeServer component cannot be used as part of a Group component. The Group component mechanism isn't designed to transparently work for any component and the Connection types that the TimeServer uses are not compatible with the Group mechanism.
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Thank you very much for answering my question. I still have a doubt about the TimeServer. I can manually modify the cdl file and then I get the the expected source file(capdl_spec.c) from using capdl-parse. I also need to change the return value of timeserver <IF>_notification API. I have try and I can run the program as I expected. Is there any way to create adapted cdl file automatic by modifying the ADL parse project? I am looking forward to getting your answer again. Thank you very much. my ADL file: import <std_connector.camkes>; import <global-connectors.camkes>; import <TimeServer/TimeServer.camkes>; component Client { control; uses Timer timeout; } assembly { composition { group grp { component Client c1; component Client c2; } component TimeServer time_server; connection seL4TimeServer ts1( from grp.c1.timeout, to time_server.the_timer); connection seL4TimeServer ts2( from grp.c2.timeout, to time_server.the_timer); } configuration { time_server.timers_per_client = 1; } }
On Tue, Dec 7, 2021 at 2:09 PM <15852538526@139.com> wrote:
Thank you very much for answering my question. I still have a doubt about the TimeServer. I can manually modify the cdl file and then I get the the expected source file(capdl_spec.c) from using capdl-parse. I also need to change the return value of timeserver <IF>_notification API. I have try and I can run the program as I expected. Is there any way to create adapted cdl file automatic by modifying the ADL parse project?
There isn't a supported way to modify the generated cdl file as CAmkES expects to generate a full system specification. What is your motivation for trying to make the timeserver a group component instead of a separate component? As part of a group component it will still have its own kernel objects for its threads, code, data and heap memories so you still have the costs of isolation but without the benefits because it still shares the virtual address space and capability space with other components in the same group.
I am looking forward to getting your answer again. Thank you very much.
my ADL file: import <std_connector.camkes>; import <global-connectors.camkes>; import <TimeServer/TimeServer.camkes>;
component Client { control; uses Timer timeout; }
assembly { composition { group grp { component Client c1; component Client c2; } component TimeServer time_server;
connection seL4TimeServer ts1( from grp.c1.timeout, to time_server.the_timer); connection seL4TimeServer ts2( from grp.c2.timeout, to time_server.the_timer); }
configuration { time_server.timers_per_client = 1; } } _______________________________________________ Devel mailing list -- devel@sel4.systems To unsubscribe send an email to devel-leave@sel4.systems
Thank you very much for your prompt reply. I want to create multiple threads which can be run with different periodic by using TimeServer. Sometimes, I think multiple threads that they share vspace by each other is a better solution than using ipc call, just like Linux threads. Is that the correct mechanism to use CAmkES? I think I have't fully understand the true purpose of CAmkES and I need to learn more about CAmkES.
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