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Evolving HMC status

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Peter Boyle 2019-04-23 21:54:45 +01:00
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HMC/README
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* Sign off 2+1f HMC with Hasenbush and strange RHMC
- Wilson plaquette cross checked against CPS and literature GwilsonFnone
- Timesteps matched
- Use 16^3x32
******************************************************************** ********************************************************************
* From previous CPS runs: TODO:
******************************************************************** ********************************************************************
- Currently 10 traj per hour
- EOFA use a different derivative solver from action solver
- EOFA fix Davids hack to the SchurRedBlack guessing
*** Reduce precision/tolerance in EOFA with second CG param. (10% speed up)
*** Force gradient - reduced precision solve for the gradient (4/3x speedup)
*** Need a plan for gauge field update for mixed precision in HMC (2x speed up)
-- Store the single prec action operator.
-- Clone the gauge field from the operator function argument.
-- Build the mixed precision operator dynamically from the passed operator and single prec clone.
*** Mixed precision CG into EOFA portion
*** Further reduce precision in forces to 10^-6 ?
*** Overall: a 3x or so is still possible => 500s -> 160s and 20 traj per hour on 16^3.
- Use mixed precision CG in HMC
- SchurRedBlack.h: stop use of operator function; use LinearOperator or similar instead.
- Or make an OperatorFunction for mixed precision as a wrapper
********************************************************************
* Signed off 2+1f HMC with Hasenbush and strange RHMC 16^3 x 32 DWF Ls=16 Plaquette 0.5883 ish
* Signed off 2+1f HMC with Hasenbush and strange EOFA 16^3 x 32 DWF Ls=16 Plaquette 0.5883 ish
* Wilson plaquette cross checked against CPS and literature GwilsonFnone
********************************************************************
********************************************************************
* RHMC: Timesteps & eigenranges matched from previous CPS 16^3 x 32 runs:
********************************************************************
****
Strange (m=0.04) has eigenspan Strange (m=0.04) has eigenspan
**** ****
16^3 done as 1+1+1 with separate PV's. 16^3 done as 1+1+1 with separate PV's.