Clear every cache tier in one call. L1+L2 are cleared together via the
caching store's clearAll; L0 and the decoded-slice S-cache are cleared
independently (the S-cache sits above L0 and holds decoded geometry, so a
"clear all" that skipped it would keep serving slice revisits from memory).
Clear every cache tier in one call. L1+L2 are cleared together via the caching store's
clearAll; L0 and the decoded-slice S-cache are cleared independently (the S-cache sits above L0 and holds decoded geometry, so a "clear all" that skipped it would keep serving slice revisits from memory).