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grid: prefetch cells in grid_row()

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Daniel Eklöf 2019-07-10 19:52:30 +02:00
parent 1a21a5fb29
commit decb4503bf
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GPG key ID: 5BBD4992C116573F
2 changed files with 5 additions and 4 deletions
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1
grid.h
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@ -20,6 +20,7 @@ grid_row(struct grid *grid, int row_no)
grid->rows[real_row] = row;
}
__builtin_prefetch(row->cells, 1, 3);
return row;
}

8
terminal.c
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@ -164,8 +164,8 @@ term_scroll_partial(struct terminal *term, struct scroll_region region, int rows
* 2) prefetch the cells - this makes life easier for erase_line() below
*/
for (int r = max(region.end - rows, 0); r < term->rows; r++) {
struct row *row = grid_row(term->grid, r);
__builtin_prefetch(row->cells, 1, 3);
struct row *row __attribute__((unused)) = grid_row(term->grid, r);
//__builtin_prefetch(row->cells, 1, 3);
}
/* Top non-scrolling region. */
@ -207,8 +207,8 @@ term_scroll_reverse_partial(struct terminal *term,
term->grid->view = term->grid->offset;
for (int r = 0; r < min(region.start + rows, region.end); r++) {
struct row *row = grid_row(term->grid, r);
__builtin_prefetch(row->cells, 1, 3);
struct row *row __attribute__((unused)) = grid_row(term->grid, r);
//__builtin_prefetch(row->cells, 1, 3);
}
/* Bottom non-scrolling region */