GLibC

  1. Bug #2030515
  2. Comment #3

Comment 3 for bug 2030515

Revision history for this message
Bruce Merry (bmerry) wrote :

It's a 16-core processor. I've attached the diagnostics.

If I run

GLIBC_TUNABLES=glibc.cpu.x86_rep_movsb_threshold=2114 ./memcpy_loop -b 2113 -p 1000000 -t mmap -S 0 -D 1 0

then I hit the high performance again (>100GB/s).