[PATCH 0/3] Reorg ppc64 pmu insn counting

[Richard Henderson]

In contrast to Daniel's version, the code stays in power8-pmu.c,
but is better organized to not take so much overhead.

Before:

    32.97%  qemu-system-ppc  qemu-system-ppc64   [.] pmc_get_event
    20.22%  qemu-system-ppc  qemu-system-ppc64   [.] helper_insns_inc
     4.52%  qemu-system-ppc  qemu-system-ppc64   [.] hreg_compute_hflags_value
     3.30%  qemu-system-ppc  qemu-system-ppc64   [.] helper_lookup_tb_ptr
     2.68%  qemu-system-ppc  qemu-system-ppc64   [.] tcg_gen_code
     2.28%  qemu-system-ppc  qemu-system-ppc64   [.] cpu_exec
     1.84%  qemu-system-ppc  qemu-system-ppc64   [.] pmu_insn_cnt_enabled

After:

     8.42%  qemu-system-ppc  qemu-system-ppc64   [.] hreg_compute_hflags_value
     6.65%  qemu-system-ppc  qemu-system-ppc64   [.] cpu_exec
     6.63%  qemu-system-ppc  qemu-system-ppc64   [.] helper_insns_inc


r~


Richard Henderson (3):
  target/ppc: Cache per-pmc insn and cycle count settings
  target/ppc: Rewrite pmu_increment_insns
  target/ppc: Use env->pnc_cyc_cnt

 target/ppc/cpu.h         |   3 +
 target/ppc/power8-pmu.h  |  14 +--
 target/ppc/cpu_init.c    |   1 +
 target/ppc/helper_regs.c |   2 +-
 target/ppc/machine.c     |   2 +
 target/ppc/power8-pmu.c  | 230 ++++++++++++++++-----------------------
 6 files changed, 108 insertions(+), 144 deletions(-)

-- 
2.25.1