For non-alising Dcache, vmalloc is not needed. vmalloc triggers additonal D-TLB Misses in the perf interrupt code path making it slightly inefficient as evident from hackbench runs below. | [ARCLinux]# perf stat -e dTLB-load-misses --repeat 5 hackbench | Running with 10*40 (== 400) tasks. | Time: 35.060 | ... | Performance counter stats for 'hackbench' (5 runs): Before: 399235 dTLB-load-misses ( +- 2.08% ) After : 397676 dTLB-load-misses ( +- 2.27% ) Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> |
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boot | ||
configs | ||
include | ||
kernel | ||
lib | ||
mm | ||
oprofile | ||
plat-axs10x | ||
plat-eznps | ||
plat-hsdk | ||
plat-sim | ||
plat-tb10x | ||
Kbuild | ||
Kconfig | ||
Kconfig.debug | ||
Makefile |