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index: add trace2 region for clear skip worktree 

When using sparse checkout, clear_skip_worktree_from_present_files() must
enumerate index entries to find ones with the SKIP_WORKTREE bit to
determine whether those index entries exist on disk (in which case their
SKIP_WORKTREE bit should be removed).

In a large repository, this may take considerable time depending on the
size of the index.

Add a trace2 region to surface this information, keeping a count of how
many paths have been checked. Separately, keep counts after a full index is
materialized.

Signed-off-by: Anh Le <anh@canva.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
This commit is contained in:
Anh Le 2022-11-03 23:05:00 +00:00 committed by Taylor Blau
parent 5af5e54106
commit 89aaab11a3
1 changed files with 22 additions and 6 deletions
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28
sparse-index.c
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@ -493,24 +493,40 @@ void clear_skip_worktree_from_present_files(struct index_state *istate)
int dir_found = 1;
int i;
int path_count[2] = {0, 0};
int restarted = 0;
if (!core_apply_sparse_checkout ||
sparse_expect_files_outside_of_patterns)
return;
trace2_region_enter("index", "clear_skip_worktree_from_present_files",
istate->repo);
restart:
for (i = 0; i < istate->cache_nr; i++) {
struct cache_entry *ce = istate->cache[i];
if (ce_skip_worktree(ce) &&
path_found(ce->name, &last_dirname, &dir_len, &dir_found)) {
if (S_ISSPARSEDIR(ce->ce_mode)) {
ensure_full_index(istate);
goto restart;
if (ce_skip_worktree(ce)) {
path_count[restarted]++;
if (path_found(ce->name, &last_dirname, &dir_len, &dir_found)) {
if (S_ISSPARSEDIR(ce->ce_mode)) {
ensure_full_index(istate);
restarted = 1;
goto restart;
}
ce->ce_flags &= ~CE_SKIP_WORKTREE;
}
ce->ce_flags &= ~CE_SKIP_WORKTREE;
}
}
if (path_count[0])
trace2_data_intmax("index", istate->repo,
"sparse_path_count", path_count[0]);
if (restarted)
trace2_data_intmax("index", istate->repo,
"sparse_path_count_full", path_count[1]);
trace2_region_leave("index", "clear_skip_worktree_from_present_files",
istate->repo);
}
/*