change from v2: __spin_yeild_cpu() will yield slices to lpar if target cpu is running. remove unnecessary rmb() in __spin_yield/wake_cpu. __pv_wait() will check the *ptr == val. some commit message change change fome v1: separate into 6 pathes from one patch some minor code changes. I do several tests on pseries IBM,8408-E8E with 32cpus, 64GB memory. benchmark test results are below. 2 perf tests: perf bench futex hash perf bench futex lock-pi _____test________________spinlcok______________pv-qspinlcok_____ |futex hash | 556370 ops | 629634 ops | |futex lock-pi | 362 ops | 367 ops | scheduler test: Test how many loops of schedule() can finish within 10 seconds on all cpus. _____test________________spinlcok______________pv-qspinlcok_____ |schedule() loops| 322811921 | 311449290 | kernel compiling test: build a linux kernel image to see how long it took _____test________________spinlcok______________pv-qspinlcok_____ | compiling takes| 22m | 22m | Pan Xinhui (6): qspinlock: powerpc support qspinlock powerpc: pseries/Kconfig: Add qspinlock build config powerpc: lib/locks.c: Add cpu yield/wake helper function pv-qspinlock: powerpc support pv-qspinlock pv-qspinlock: use cmpxchg_release in __pv_queued_spin_unlock powerpc: pseries: Add pv-qspinlock build config/make arch/powerpc/include/asm/qspinlock.h | 39 +++++++++++++++++++ arch/powerpc/include/asm/qspinlock_paravirt.h | 38 ++++++++++++++++++ .../powerpc/include/asm/qspinlock_paravirt_types.h | 13 +++++++ arch/powerpc/include/asm/spinlock.h | 31 +++++++++------ arch/powerpc/include/asm/spinlock_types.h | 4 ++ arch/powerpc/kernel/Makefile | 1 + arch/powerpc/kernel/paravirt.c | 45 ++++++++++++++++++++++ arch/powerpc/lib/locks.c | 37 ++++++++++++++++++ arch/powerpc/platforms/pseries/Kconfig | 9 +++++ arch/powerpc/platforms/pseries/setup.c | 5 +++ kernel/locking/qspinlock_paravirt.h | 2 +- 11 files changed, 211 insertions(+), 13 deletions(-) create mode 100644 arch/powerpc/include/asm/qspinlock.h create mode 100644 arch/powerpc/include/asm/qspinlock_paravirt.h create mode 100644 arch/powerpc/include/asm/qspinlock_paravirt_types.h create mode 100644 arch/powerpc/kernel/paravirt.c -- 1.9.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
