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[Bug target/57571] linux kernel function memcpy() execute with low efficiency on Intel Ivybridge platform
- From: "yiyi8761 at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 09 Jun 2013 08:13:09 +0000
- Subject: [Bug target/57571] linux kernel function memcpy() execute with low efficiency on Intel Ivybridge platform
- Auto-submitted: auto-generated
- References: <bug-57571-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57571
--- Comment #3 from phoenix <yiyi8761 at gmail dot com> ---
1. "Can you provide the preprocessed source"
Sorry,I trace the linux source code, the kernel used __builtin___memcpy() to
replace memcpy(). I can't find the __builtin___memcpy() source code in the
linux source code. It seems it is processed by GCC.
2. "the kernel is not generating memcpy at runtime?"
Could you give me a little explanation about this? Thank you very much!