* [Qemu-devel] How to understand the coroutine context?
@ 2014-03-17 23:56 Le Tan
2014-03-18 4:04 ` Kashyap Chamarthy
` (2 more replies)
0 siblings, 3 replies; 12+ messages in thread
From: Le Tan @ 2014-03-17 23:56 UTC (permalink / raw)
To: qemu-devel
Hi, I am diving into the source code of qemu. I see the word
"coroutine" appears in so many places. I can't figure out what it
means. So, please, can anyone help me, telling me the mechanism or
semantic of "coroutine"? Thanks!
--Le Tan
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-17 23:56 [Qemu-devel] How to understand the coroutine context? Le Tan @ 2014-03-18 4:04 ` Kashyap Chamarthy 2014-03-18 5:45 ` Le Tan 2014-03-18 22:28 ` Thomas Huth 2014-03-18 12:28 ` Juan Quintela 2014-03-18 13:57 ` Leandro Dorileo 2 siblings, 2 replies; 12+ messages in thread From: Kashyap Chamarthy @ 2014-03-18 4:04 UTC (permalink / raw) To: Le Tan; +Cc: qemu-devel On Tue, Mar 18, 2014 at 07:56:16AM +0800, Le Tan wrote: > Hi, I am diving into the source code of qemu. I see the word > "coroutine" appears in so many places. I can't figure out what it > means. So, please, can anyone help me, telling me the mechanism or > semantic of "coroutine"? Thanks! This might be of help -- http://blog.vmsplice.net/2014/01/coroutines-in-qemu-basics.html -- /kashyap ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-18 4:04 ` Kashyap Chamarthy @ 2014-03-18 5:45 ` Le Tan 2014-03-18 22:28 ` Thomas Huth 1 sibling, 0 replies; 12+ messages in thread From: Le Tan @ 2014-03-18 5:45 UTC (permalink / raw) To: Kashyap Chamarthy; +Cc: qemu-devel Thanks, that is an excellent blog! 2014-03-18 12:04 GMT+08:00 Kashyap Chamarthy <kchamart@redhat.com>: > On Tue, Mar 18, 2014 at 07:56:16AM +0800, Le Tan wrote: >> Hi, I am diving into the source code of qemu. I see the word >> "coroutine" appears in so many places. I can't figure out what it >> means. So, please, can anyone help me, telling me the mechanism or >> semantic of "coroutine"? Thanks! > > This might be of help -- > http://blog.vmsplice.net/2014/01/coroutines-in-qemu-basics.html > > > -- > /kashyap ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-18 4:04 ` Kashyap Chamarthy 2014-03-18 5:45 ` Le Tan @ 2014-03-18 22:28 ` Thomas Huth 2014-03-19 10:05 ` Stefan Hajnoczi 1 sibling, 1 reply; 12+ messages in thread From: Thomas Huth @ 2014-03-18 22:28 UTC (permalink / raw) To: Stefan Hajnoczi; +Cc: qemu-devel, Le Tan, Kashyap Chamarthy On Tue, 18 Mar 2014 09:34:56 +0530 Kashyap Chamarthy <kchamart@redhat.com> wrote: > On Tue, Mar 18, 2014 at 07:56:16AM +0800, Le Tan wrote: > > Hi, I am diving into the source code of qemu. I see the word > > "coroutine" appears in so many places. I can't figure out what it > > means. So, please, can anyone help me, telling me the mechanism or > > semantic of "coroutine"? Thanks! > > This might be of help -- > http://blog.vmsplice.net/2014/01/coroutines-in-qemu-basics.html That's a very nice introduction ... Stefan, maybe you could also add that to the docs directory of the QEMU repository? There does not seem to be a description of the QEMU coroutines there yet... Regards, Thomas ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-18 22:28 ` Thomas Huth @ 2014-03-19 10:05 ` Stefan Hajnoczi 2014-03-19 10:13 ` Thomas Huth 0 siblings, 1 reply; 12+ messages in thread From: Stefan Hajnoczi @ 2014-03-19 10:05 UTC (permalink / raw) To: Thomas Huth; +Cc: qemu-devel, Le Tan, Kashyap Chamarthy On Tue, Mar 18, 2014 at 11:28:47PM +0100, Thomas Huth wrote: > On Tue, 18 Mar 2014 09:34:56 +0530 > Kashyap Chamarthy <kchamart@redhat.com> wrote: > > > On Tue, Mar 18, 2014 at 07:56:16AM +0800, Le Tan wrote: > > > Hi, I am diving into the source code of qemu. I see the word > > > "coroutine" appears in so many places. I can't figure out what it > > > means. So, please, can anyone help me, telling me the mechanism or > > > semantic of "coroutine"? Thanks! > > > > This might be of help -- > > http://blog.vmsplice.net/2014/01/coroutines-in-qemu-basics.html > > That's a very nice introduction ... Stefan, maybe you could also add > that to the docs directory of the QEMU repository? There does not seem > to be a description of the QEMU coroutines there yet... Have you seen the documentation in include/block/coroutine.h? Stefan ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-19 10:05 ` Stefan Hajnoczi @ 2014-03-19 10:13 ` Thomas Huth 2014-03-19 11:15 ` Stefan Hajnoczi 0 siblings, 1 reply; 12+ messages in thread From: Thomas Huth @ 2014-03-19 10:13 UTC (permalink / raw) To: Stefan Hajnoczi; +Cc: qemu-devel, Le Tan, Kashyap Chamarthy On Wed, 19 Mar 2014 11:05:02 +0100 Stefan Hajnoczi <stefanha@redhat.com> wrote: > On Tue, Mar 18, 2014 at 11:28:47PM +0100, Thomas Huth wrote: > > On Tue, 18 Mar 2014 09:34:56 +0530 > > Kashyap Chamarthy <kchamart@redhat.com> wrote: > > > > > On Tue, Mar 18, 2014 at 07:56:16AM +0800, Le Tan wrote: > > > > Hi, I am diving into the source code of qemu. I see the word > > > > "coroutine" appears in so many places. I can't figure out what it > > > > means. So, please, can anyone help me, telling me the mechanism or > > > > semantic of "coroutine"? Thanks! > > > > > > This might be of help -- > > > http://blog.vmsplice.net/2014/01/coroutines-in-qemu-basics.html > > > > That's a very nice introduction ... Stefan, maybe you could also add > > that to the docs directory of the QEMU repository? There does not seem > > to be a description of the QEMU coroutines there yet... > > Have you seen the documentation in include/block/coroutine.h? Yes, but that does not have the nice introduction that you've given in your blog - that's why I though it might be useful to have that information in a file in the docs directory, too. Well, it was just an idea ... if you think the API description in coroutine.h is sufficient, I am certainly fine with that. Regards, Thomas ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-19 10:13 ` Thomas Huth @ 2014-03-19 11:15 ` Stefan Hajnoczi 0 siblings, 0 replies; 12+ messages in thread From: Stefan Hajnoczi @ 2014-03-19 11:15 UTC (permalink / raw) To: Thomas Huth; +Cc: qemu-devel, Le Tan, Kashyap Chamarthy On Wed, Mar 19, 2014 at 11:13:56AM +0100, Thomas Huth wrote: > On Wed, 19 Mar 2014 11:05:02 +0100 > Stefan Hajnoczi <stefanha@redhat.com> wrote: > > > On Tue, Mar 18, 2014 at 11:28:47PM +0100, Thomas Huth wrote: > > > On Tue, 18 Mar 2014 09:34:56 +0530 > > > Kashyap Chamarthy <kchamart@redhat.com> wrote: > > > > > > > On Tue, Mar 18, 2014 at 07:56:16AM +0800, Le Tan wrote: > > > > > Hi, I am diving into the source code of qemu. I see the word > > > > > "coroutine" appears in so many places. I can't figure out what it > > > > > means. So, please, can anyone help me, telling me the mechanism or > > > > > semantic of "coroutine"? Thanks! > > > > > > > > This might be of help -- > > > > http://blog.vmsplice.net/2014/01/coroutines-in-qemu-basics.html > > > > > > That's a very nice introduction ... Stefan, maybe you could also add > > > that to the docs directory of the QEMU repository? There does not seem > > > to be a description of the QEMU coroutines there yet... > > > > Have you seen the documentation in include/block/coroutine.h? > > Yes, but that does not have the nice introduction that you've given in > your blog - that's why I though it might be useful to have that > information in a file in the docs directory, too. Well, it was just an > idea ... if you think the API description in coroutine.h is sufficient, > I am certainly fine with that. I will expand the documentation in include/block/coroutine.h. Stefan ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-17 23:56 [Qemu-devel] How to understand the coroutine context? Le Tan 2014-03-18 4:04 ` Kashyap Chamarthy @ 2014-03-18 12:28 ` Juan Quintela 2014-03-18 12:54 ` Markus Armbruster 2014-03-18 13:57 ` Leandro Dorileo 2 siblings, 1 reply; 12+ messages in thread From: Juan Quintela @ 2014-03-18 12:28 UTC (permalink / raw) To: Le Tan; +Cc: qemu-devel Le Tan <tamlokveer@gmail.com> wrote: > Hi, I am diving into the source code of qemu. I see the word > "coroutine" appears in so many places. I can't figure out what it > means. So, please, can anyone help me, telling me the mechanism or > semantic of "coroutine"? Thanks! google, 1st hit, wikipedia: https://en.wikipedia.org/wiki/Coroutine A bit short resume: Getting "user"-threads when you don't have threads. Later, Juan. ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-18 12:28 ` Juan Quintela @ 2014-03-18 12:54 ` Markus Armbruster 2014-03-18 13:13 ` Juan Quintela 0 siblings, 1 reply; 12+ messages in thread From: Markus Armbruster @ 2014-03-18 12:54 UTC (permalink / raw) To: quintela; +Cc: Le Tan, qemu-devel Juan Quintela <quintela@redhat.com> writes: > Le Tan <tamlokveer@gmail.com> wrote: >> Hi, I am diving into the source code of qemu. I see the word >> "coroutine" appears in so many places. I can't figure out what it >> means. So, please, can anyone help me, telling me the mechanism or >> semantic of "coroutine"? Thanks! > > google, 1st hit, wikipedia: > > https://en.wikipedia.org/wiki/Coroutine > > A bit short resume: > > Getting "user"-threads when you don't have threads. More like getting multiple flows of control even though you don't want threads. ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-18 12:54 ` Markus Armbruster @ 2014-03-18 13:13 ` Juan Quintela 2014-03-18 13:48 ` Markus Armbruster 0 siblings, 1 reply; 12+ messages in thread From: Juan Quintela @ 2014-03-18 13:13 UTC (permalink / raw) To: Markus Armbruster; +Cc: Le Tan, qemu-devel Markus Armbruster <armbru@redhat.com> wrote: > Juan Quintela <quintela@redhat.com> writes: > >> Le Tan <tamlokveer@gmail.com> wrote: >>> Hi, I am diving into the source code of qemu. I see the word >>> "coroutine" appears in so many places. I can't figure out what it >>> means. So, please, can anyone help me, telling me the mechanism or >>> semantic of "coroutine"? Thanks! >> >> google, 1st hit, wikipedia: >> >> https://en.wikipedia.org/wiki/Coroutine >> >> A bit short resume: >> >> Getting "user"-threads when you don't have threads. > > More like getting multiple flows of control even though you don't want > threads. If he don't understand coroutine, you think that flows of control has any chance? O:-) Later, Juan. ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-18 13:13 ` Juan Quintela @ 2014-03-18 13:48 ` Markus Armbruster 0 siblings, 0 replies; 12+ messages in thread From: Markus Armbruster @ 2014-03-18 13:48 UTC (permalink / raw) To: quintela; +Cc: Le Tan, qemu-devel Juan Quintela <quintela@redhat.com> writes: > Markus Armbruster <armbru@redhat.com> wrote: >> Juan Quintela <quintela@redhat.com> writes: >> >>> Le Tan <tamlokveer@gmail.com> wrote: >>>> Hi, I am diving into the source code of qemu. I see the word >>>> "coroutine" appears in so many places. I can't figure out what it >>>> means. So, please, can anyone help me, telling me the mechanism or >>>> semantic of "coroutine"? Thanks! >>> >>> google, 1st hit, wikipedia: >>> >>> https://en.wikipedia.org/wiki/Coroutine >>> >>> A bit short resume: >>> >>> Getting "user"-threads when you don't have threads. >> >> More like getting multiple flows of control even though you don't want >> threads. > > If he don't understand coroutine, you think that flows of control has > any chance? O:-) Point taken & LOL ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] How to understand the coroutine context? 2014-03-17 23:56 [Qemu-devel] How to understand the coroutine context? Le Tan 2014-03-18 4:04 ` Kashyap Chamarthy 2014-03-18 12:28 ` Juan Quintela @ 2014-03-18 13:57 ` Leandro Dorileo 2 siblings, 0 replies; 12+ messages in thread From: Leandro Dorileo @ 2014-03-18 13:57 UTC (permalink / raw) To: Le Tan; +Cc: qemu-devel Hi, On Tue, Mar 18, 2014 at 07:56:16AM +0800, Le Tan wrote: > Hi, I am diving into the source code of qemu. I see the word > "coroutine" appears in so many places. I can't figure out what it > means. So, please, can anyone help me, telling me the mechanism or > semantic of "coroutine"? Thanks! If you want to understand the coroutine technique itself take a look at this page[1], the're two references that may be helpfull. A friend of mine has described[2] his view on implementing coroutine, this may be helpfull as well. [1] - http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html [2] - http://tia.mat.br/blog/html/2012/09/29/asynchronous_i_o_in_c_with_coroutines.html Regards... -- Leandro Dorileo ^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2014-03-19 11:15 UTC | newest] Thread overview: 12+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-03-17 23:56 [Qemu-devel] How to understand the coroutine context? Le Tan 2014-03-18 4:04 ` Kashyap Chamarthy 2014-03-18 5:45 ` Le Tan 2014-03-18 22:28 ` Thomas Huth 2014-03-19 10:05 ` Stefan Hajnoczi 2014-03-19 10:13 ` Thomas Huth 2014-03-19 11:15 ` Stefan Hajnoczi 2014-03-18 12:28 ` Juan Quintela 2014-03-18 12:54 ` Markus Armbruster 2014-03-18 13:13 ` Juan Quintela 2014-03-18 13:48 ` Markus Armbruster 2014-03-18 13:57 ` Leandro Dorileo
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