| commit | 9d61722b599a02a6d3caed1d75417a7f5e661693 | |
| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | |
| Tue, 16 Feb 2021 17:02:44 +0000 (16 17:02 +0000) | ||
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | |
| Fri, 26 Mar 2021 11:03:06 +0000 (26 11:03 +0000) | ||
| tree | 565e05bea7b1b44d556a197525d9ac5a3e43dc63 | treesnapshot (tar.gz zip) |
| parent | c076a0bc698c537f72c33bad2925f4e3da59d23c | commitdiff |
malloc: Change calloc when tagging is disabled
When glibc is built with memory tagging support (USE_MTAG) but it is not
enabled at runtime (mtag_enabled) then unconditional memset was used
even though that can be often avoided.
This is for performance when tagging is supported but not enabled.
The extra check should have no overhead: tag_new_zero_region already
had a runtime check which the compiler can now optimize away.
Reviewed-by: DJ Delorie <dj@redhat.com>
When glibc is built with memory tagging support (USE_MTAG) but it is not
enabled at runtime (mtag_enabled) then unconditional memset was used
even though that can be often avoided.
This is for performance when tagging is supported but not enabled.
The extra check should have no overhead: tag_new_zero_region already
had a runtime check which the compiler can now optimize away.
Reviewed-by: DJ Delorie <dj@redhat.com>
| malloc/malloc.c | diffblobblamehistory |