Enable greater parallelization of concurrent WASM executions

[stephenpdeos]

Parallelization of read only transactions is limited by the number of concurrent WASM executions that can be supported by Leap. There are resource limits that bound the number of concurrent WASM executions allowed. This epic focusses on changes to eos-vm runtimes (for example: interpreter, JIT, and OC), as well as further optimizations within Leap to increase the number of concurrent WASM executions that Leap can support.

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1. Design Proposal of EOS VMs improvements for Parallel Read-only Transaction Execution #161
   +0
2. Collect EOS-VM-OC memory usage from the mainnet AntelopeIO/leap#1159
   👍 lgtm +1
   
3. further improvement of parallel read-only trx execution fallback when OC tier up enabled AntelopeIO/leap#1119
   OCI actionable tech debt 👍 lgtm +4
   
4. Make compiled module sharable in multi-threaded EOS-VM-Interpreter and EOS-VM-Jit execution AntelopeIO/eos-vm#7
   👍 lgtm +1
   
5. Parse wasms once for JIT AntelopeIO/eos-vm#17
   👍 lgtm +1
   
6. Do not create/use/cache execution context per contract AntelopeIO/leap#1456
   👍 lgtm +1
   
7. Use single WASM interface for parallel read-only trx execution AntelopeIO/leap#1158
   actionable 👍 lgtm +2
   
8. Reduce EOS VM OC's memory slice count allowing for higher parallelization AntelopeIO/leap#645
   👍 lgtm +1
   
9. Increase default read-only-threads AntelopeIO/leap#1257
   👍 lgtm +1
   
10. EOS VM OC: add a compile knob to define the transition threshold for transitioning from mirroring to mprotect() AntelopeIO/leap#1256
    👍 lgtm +1
    
11. Calculate total VM size properly for EOS-VM-OC in parallel read-only transaction execution AntelopeIO/leap#801
    enhancement 👍 lgtm +2
    

[linh2931]

The design document is https://github.com/eosnetworkfoundation/product/blob/read_only_trx_memory/transactions/read-only/memory.md.

[BenjaminGormanPMP]

@bhazzard and @stephenpdeos can you review Lin's document and provide next steps? Thanks.
Design document https://github.com/eosnetworkfoundation/product/blob/read_only_trx_memory/transactions/read-only/memory.md.

[BenjaminGormanPMP]

Closed. All tasks assigned to @linh2931 were completed.