perf2bolt: crashes with assertion. about bolt HOT 5 OPEN

Thanks for the report. Please use -strict=0 option as a workaround.

from bolt.

Another potential cause is the presence of split functions:

BOLT-WARNING: split function detected on input : OnUpdate_date_timezone.cold.13

BOLT is currently incompatible with the -freorder-blocks-and-partition compiler option producing split functions. Since GCC8 enables this option by default, you have to explicitly disable it by adding -fno-reorder-blocks-and-partition flag if you are compiling with GCC8 or above.

from bolt.

@maksfb, thanks. I need some time to try that option. Will update you if it can work later.

@aaupov , Thanks for the quick response. I used GCC7 to build php-fpm. My understanding is that I don't have to add that flag. Am I right?

from bolt.

@maksfb, thanks. I need some time to try that option. Will update you if it can work later.

@aaupov , Thanks for the quick response. I used GCC7 to build php-fpm. My understanding is that I don't have to add that flag. Am I right?

Check your compiler flags, and if they include -freorder-blocks-and-partition, just remove it. GCC7 has this optimization but doesn't enable it by default.

from bolt.

Thanks for the report. Please use -strict=0 option as a workaround.

@maksfb , it looks the option can work as a workaround. May I know what "-strict=0" means? I don't find anything about it in the official document.

from bolt.