[gem5-users] ?????? some problem about IO device's write or read function's return tick

[lin via gem5-users]

Thanks!
Now I want to evulate the performance(e.g running time) about a system with my 
own IO device,which mode of the "cpu" and the "memory" should I use,*atomic* or 
*timing*?






------------------ ???????? ------------------
??????:                                                                         
                                               "Jason Lowe-Power"               
                                                                     
<ja...@lowepower.com&gt;;
????????:&nbsp;2021??12??28??(??????) ????4:59
??????:&nbsp;"gem5 users mailing list"<gem5-users@gem5.org&gt;;
????:&nbsp;"lin"<863342...@qq.com&gt;;
????:&nbsp;Re: [gem5-users] some problem about IO device's write or read 
function's return tick



Hello,

If you are using *atomic* memory mode, then the tick number is mostly ignored. 
If you're using *timing* mode, then the tick number should be used by whatever 
object calls the read/write function and the delay is inserted there. Also, if 
your program doesn't have a direct dependence on the I/O device, the latency 
may be hidden. Enabling various debug flags should help you track 
this&nbsp;down.


Cheers,
Jason


On Thu, Dec 23, 2021 at 8:58 AM lin via gem5-users <gem5-users@gem5.org&gt; 
wrote:

Hi


I make an IO device link to the membus and complete the Tick read(PacketPtr 
pkt) and the write() function .But I find that no matter how many ticks ( the 
funciton return n*tick) I set,the simSeconds no change.If it normal?If not , 
what can I do to set the return ticks of the read() or write() function?


Thanks everyone!



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