We already improved scalability of SYS_times() and
SYS_clock_gettimes(CLOCK_PROCESS_CPUTIME_ID) syscalls on 64-bit cpus.
However performance on 32-bit cpus is still poor. Patches improved that
and fix sum_exec_runtime 64 bit variable possible (but very very unlike)
inconsistency problem on 32-bit architectures.
Second patch could be merged with first one, but I posted it separately
for eventual discussion.
Stanislaw Gruszka (3):
sched/cputime: Improve scalability of times()/clock_gettime() on 32
bit cpus
sched/cputime: Make nr_migrations u32 on 32 bit cpus
sched/cputime: Protect other sum_exec_runtime reads on 32 bit cpus
fs/proc/base.c | 2 +-
include/linux/sched.h | 40 ++++++++++++++++++++++++++++++++++++++--
kernel/delayacct.c | 2 +-
kernel/exit.c | 2 +-
kernel/sched/core.c | 17 +++++------------
kernel/sched/cputime.c | 24 ++----------------------
kernel/sched/deadline.c | 2 +-
kernel/sched/debug.c | 4 ++--
kernel/sched/fair.c | 2 +-
kernel/sched/rt.c | 2 +-
kernel/time/posix-cpu-timers.c | 7 ++++---
11 files changed, 57 insertions(+), 47 deletions(-)
--
1.8.3.1
