[GitHub] [incubator-tvm] jackwish edited a comment on issue #4277: [ARM][Topi] Improving Int8 Perf in Spatial Conv2D schedule.

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jackwish edited a comment on issue #4277: [ARM][Topi] Improving Int8 Perf in Spatial Conv2D schedule.
URL: https://github.com/apache/incubator-tvm/pull/4277#issuecomment-552157956
 
 
   > @jackwish Yes, sharing code will be very helpful. For now, do you prefer changing schedule OR Legalize pass?
   > 
   > Changing Schedule
   > 
   > * (+) The change is contained to only one template.
   > * (-) Schedules are generally hard to understand. In general, I try to avoid complicating them.
   > 
   > Legalize Pass
   > 
   > * (+) The codebase might be cleaner (if one understands Relay passes).
   > * (+) Topi schedules are generally hard to understand. In general, I try to avoid complicating them. This avoids that.
   > * (-) Applies to all templates. For example, if I write a new template (like direct, winograd), legalize will upcast.
   > 
   > I dont have any strong opinion.
   
   Hi @anijain2305 , I think a *Legalize Pass* may lead to a clean *code structure* or *architecture*, while a *Changing Schedule* contribute to a *easy to read*. I feel the same on *having no strong opinion* :(
   
   Yet, one thing that I am considering is that, if the legalization is going to handle all, will it make the *tensorize compute pattern matching* a bit more hard to write or debug or something
   By this I mean:
   * in schedule we write *int8 cast to int32 and multiply*
   * legalization rewrites to *int8 cast to int16 and multiplied to int32*
   So, what is the compute pattern shall a tensorize to match? Not sure if this will be a problem :)

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