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| author | Ingo Molnar <mingo@kernel.org> | 2022-03-15 09:02:10 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2022-03-15 09:05:05 +0100 |
| commit | ccacfe56d7ecdd2922256b87e9ea46f13bb03b55 (patch) | |
| tree | 1e8e35493c74ae579f977af08fcb9e4dccfd8faf /drivers/pci/controller/vmd.c | |
| parent | cgroup: Fix suspicious rcu_dereference_check() usage warning (diff) | |
| parent | sched/headers: Reorganize, clean up and optimize kernel/sched/sched.h depende... (diff) | |
| download | linux-ccacfe56d7ecdd2922256b87e9ea46f13bb03b55.tar.xz linux-ccacfe56d7ecdd2922256b87e9ea46f13bb03b55.zip | |
Merge branch 'sched/fast-headers' into sched/core
Merge the scheduler build speedup of the fast-headers tree.
Cumulative scheduler (kernel/sched/) build time speedup on a
Linux distribution's config, which enables all scheduler features,
compared to the vanilla kernel:
_____________________________________________________________________________
|
| Vanilla kernel (v5.13-rc7):
|_____________________________________________________________________________
|
| Performance counter stats for 'make -j96 kernel/sched/' (3 runs):
|
| 126,975,564,374 instructions # 1.45 insn per cycle ( +- 0.00% )
| 87,637,847,671 cycles # 3.959 GHz ( +- 0.30% )
| 22,136.96 msec cpu-clock # 7.499 CPUs utilized ( +- 0.29% )
|
| 2.9520 +- 0.0169 seconds time elapsed ( +- 0.57% )
|_____________________________________________________________________________
|
| Patched kernel:
|_____________________________________________________________________________
|
| Performance counter stats for 'make -j96 kernel/sched/' (3 runs):
|
| 50,420,496,914 instructions # 1.47 insn per cycle ( +- 0.00% )
| 34,234,322,038 cycles # 3.946 GHz ( +- 0.31% )
| 8,675.81 msec cpu-clock # 3.053 CPUs utilized ( +- 0.45% )
|
| 2.8420 +- 0.0181 seconds time elapsed ( +- 0.64% )
|_____________________________________________________________________________
Summary:
- CPU time used to build the scheduler dropped by -60.9%, a reduction
from 22.1 clock-seconds to 8.7 clock-seconds.
- Wall-clock time to build the scheduler dropped by -3.9%, a reduction
from 2.95 seconds to 2.84 seconds.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/pci/controller/vmd.c')
0 files changed, 0 insertions, 0 deletions