On 14/01/14 01:49, Andrew Pinski wrote: > Hi, > While writing a scheduler for Cavium's aarch64 processor (Thunder), > I found there was no way currently to change the issue rate in > back-end. This patch adds a field (issue_rate) to tune_params and > creates a new function that the middle-end calls. I updated the > current two tuning variables (generic_tunings and cortexa53_tunings) > to be 1 which was the default before. > > OK? Built and tested for aarch64-elf with no regressions. > > Thanks, > Andrew Pinski > > ChangeLog: > * config/aarch64/aarch64-protos.h (tune_params): Add issue_rate. > * config/aarch64/aarch64.c (generic_tunings): Add issue rate of 1. > (cortexa53_tunings): Likewise. > (aarch64_sched_issue_rate): New function. > (TARGET_SCHED_ISSUE_RATE): Define. > >
Ug, I'd missed that we weren't setting this. I think the value should be 2 for both generic and Cortex-A53 (I can't really envisage single-issue AArch64 systems). OK with that change (yes I know that wasn't the default before)... R.
