On 8/18/26 10:42, Matt Turner wrote:
4 RFC: tcg: probe the TB jump cache inline instead of calling a helper
95.8% of those 8.4 billion helper_lookup_tb_ptr() calls hit the jump
cache. Emit the probe inline (hash, three guarded loads, goto_ptr)
and call the helper only on a miss. -36.51%, -27.05% wall
5 RFC: accel/tcg: allow cross-page goto_tb chaining in user-only builds
translator_use_goto_tb() refuses to chain across a page. In user-only
builds the invalidation path already covers what that was protecting
against: every mmap/mprotect/munmap reaches page_set_flags(), which
invalidates and unlinks. Lift it there, keep it for system mode.
-2.42%, -4.68% wall
Both of these will break breakpoints.
However: for user-only, gdb can only be attached at startup. So we can recognize that no
breakpoints are possible and make this optimization then.
r~
