On Thu, Apr 01, 2021 at 11:54:05AM +0200, Jan Beulich wrote: > To reduce latency on time_calibration_tsc_rendezvous()'s last loop > iteration, read the value to be written on the last iteration at the end > of the loop body (i.e. in particular at the end of the second to last > iteration). > > On my single-socket 18-core Skylake system this reduces the average loop > exit time on CPU0 (from the TSC write on the last iteration to until > after the main loop) from around 32k cycles to around 29k (albeit the > values measured on separate runs vary quite significantly). > > Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Roger Pau Monné <roger....@citrix.com> Thanks, Roger.
