Support of link time symbols reorder to improve performance
Thu May 6 16:34:21 GMT 2021
On Fri, 2021-05-07 at 00:06 +0800, 陈云星 via Gcc-help wrote:
> From llvm community:
> https://reviews.llvm.org/rG1a33c0f2422c97dbfdbf11e561bb7823d71e3145 <
> LLD linker has an option : --symbol-ordering-file
> Which support direct linker to sort symbol in result object by a user
> supplied file;
> This improve performance by reduce instruction cache miss.
> The hottest function will cluster and code cache hit rate will be high.
> Does gnu linker can support this ?
I think with -ffunction-sections and -fdata-sections, and a ld script it
can be achieved. But it may be very painful.
Cc binutils, as it's a more proper location to discuss this.
Xi Ruoyao <firstname.lastname@example.org>
School of Aerospace Science and Technology, Xidian University
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