https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99105
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|profile streaming scales |[11 regression] profile
|poorly to projects with |streaming scales poorly to
|many source files |projects with many source
| |files
--- Comment #14 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
With GCC10 the testuiste seems to run reasonably fast (in about 20 minutes
too). Profile is
21.38% clang-11 [.] gcov_do_dump
9.99% clang-11 [.] gcov_read_words
5.42% [kernel] [k]
copy_user_enhanced_fast_string
2.68% FileCheck [.] lstep
2.63% [kernel] [k] clear_page_erms
2.53% clang-11 [.] __gcov_merge_add
2.23% clang-11 [.] gcov_write_words
1.93% clang-11 [.]
__gcov_read_counter
1.50% clang-11 [.]
__gcov_merge_topn
1.29% [kernel] [k]
native_queued_spin_lock_slowpath
1.26% [kernel] [k] alloc_set_pte
1.20% [kernel] [k]
__x86_indirect_thunk_rax
1.05% FileCheck [.] sstep
0.79% [kernel] [k] _raw_spin_lock
0.78% [kernel] [k] kmem_cache_free
0.78% [kernel] [k]
generic_file_buffered_read
0.72% [kernel] [k] kmem_cache_alloc
0.69% [kernel] [k] kfree
0.64% [kernel] [k] page_remove_rmap
0.63% [kernel] [k]
filemap_map_pages
0.60% [kernel] [k] __slab_free
0.55% [kernel] [k] handle_mm_fault
So I am marking this a regression at least until we analyze it better.
