* - estimate a program cost as 2 standard deviation above mean
- replaced get_average / get_mode with get_default to assign max units to unknown program
(cherry picked from commit a25ac1c988)
# Conflicts:
# runtime/src/cost_model.rs
* use EMA in place of Welford
(cherry picked from commit 6587dbfa47)
* 1. Persist to blockstore less frequently;
2. reduce alpha for EMA to 1 percent to have roughly 200 data points for estimatio
(cherry picked from commit 7aa1fb4e24)
# Conflicts:
# core/src/cost_update_service.rs
# core/src/tvu.rs
# runtime/src/cost_model.rs
* fix tests after merge
(cherry picked from commit ba2d83f580)
* fix merge
Co-authored-by: Tao Zhu <tao@solana.com>
d64eebb799