cpu_poke is a low latency path to resume the target cpu if suspended
using cpu_yield. Use cpu poke to resume cpu if supported by hypervisor.
hackbench results (lower is better):
Number of
Process: w/o fix with fix
1 0.012 0.010
10 0.021 0.019
100 0.151 0.148
Vijay Kumar (2):
sparc64: Add a new hypercall CPU_POKE
sparc64: Use cpu_poke to resume idle cpu
arch/sparc/include/asm/hypervisor.h | 17 ++++++++
arch/sparc/include/asm/smp_64.h | 5 ++
arch/sparc/kernel/hvapi.c | 9 ++++
arch/sparc/kernel/hvcalls.S | 11 +++++
arch/sparc/kernel/process_64.c | 7 +++-
arch/sparc/kernel/setup_64.c | 1 +
arch/sparc/kernel/smp_64.c | 75 +++++++++++++++++++++++++++++++++-
7 files changed, 121 insertions(+), 4 deletions(-)
--
