Hi all,

Recently, I'm helping my mentor research open source DL accelerators, and our 
short-term goal is to implement these accelerators on our own FPGA platform. 
Vta attracted me so much for its complete software tool chain and customizable 
architecture. I'm very glade to join you, it's realy a special attempt for me.

I have successful run resnet-18 in my PYNQ-v2 by following [VTA Installation 
Guide](https://tvm.apache.org/docs/vta/install.html) and vta tutorials. Now I'm 
working on generate an optimal bitstream for other FPGA with more resources. 
Some problems are bothering me:

1.Where can I find the configuration information:"**HW_FREQ**" and 
"**HW_CLK_TARGET**" that mentioned in "VTA Intallation Guide---HLS-based Custom 
VTA Bitstream Compilation for Pynq". I tried to search the key-words in the 
whole "TVM" project but find nothing. Then I find object **self.fpga_freq** and 
**self.fpga_per in** in `pkg_config.py` file, but it seems noting changed 
between new bitstream generated with "142MHz" and "6ns" and old bitstream.

2.I notice vta architecture have some "knobs" which provide users to adjust VTA 
 in **GEMM hardware intrinsic shape**, **numbers of parallel arithmetic units 
in the tensor ALU**, **BRAM distribution bwteen on-chip memories**… Are these 
"knobs" those listed in the `vta_config.json` file? What is their 
correspondence? If not, where can I config them?

I'll be very appreciate if someone being able to get me through these problem.
Thanks a lot.





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