Thorsten Blum 347bd7f072 tracing: Improve benchmark test performance by using do_div() ... Partially revert commit d6cb38e108 ("tracing: Use div64_u64() instead of do_div()") and use do_div() again to utilize its faster 64-by-32 division compared to the 64-by-64 division done by div64_u64(). Explicitly cast the divisor bm_cnt to u32 to prevent a Coccinelle warning reported by do_div.cocci. The warning was removed with commit d6cb38e108 ("tracing: Use div64_u64() instead of do_div()"). Using the faster 64-by-32 division and casting bm_cnt to u32 is safe because we return early from trace_do_benchmark() if bm_cnt > UINT_MAX. This approach is already used twice in trace_do_benchmark() when calculating the standard deviation: do_div(stddev, (u32)bm_cnt); do_div(stddev, (u32)bm_cnt - 1); Link: https://lore.kernel.org/linux-trace-kernel/20240329160229.4874-2-thorsten.blum@toblux.com Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>		2024-05-13 20:00:57 -04:00
..
bpf	bpf: verifier: prevent userspace memory access	2024-04-26 09:45:18 -07:00
cgroup
configs	configs/hardening: Disable CONFIG_UBSAN_SIGNED_WRAP	2024-04-15 11:08:24 -07:00
debug
dma	swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y	2024-05-02 14:57:04 +02:00
entry
events
futex
gcov
irq
kcsan
livepatch
locking
module
power	PM: s2idle: Make sure CPUs will wakeup directly on resume	2024-04-08 15:36:54 +02:00
printk
rcu
sched	sched/isolation: Fix boot crash when maxcpus < first housekeeping CPU	2024-04-28 10:08:21 +02:00
time	timekeeping: Use READ/WRITE_ONCE() for tick_do_timer_cpu	2024-04-10 10:13:42 +02:00
trace	tracing: Improve benchmark test performance by using do_div()	2024-05-13 20:00:57 -04:00
.gitignore
acct.c
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c	bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS	2024-04-29 08:29:29 -07:00
capability.c
cfi.c
compat.c
configs.c
context_tracking.c
cpu.c	cpu: Ignore "mitigations" kernel parameter if CPU_MITIGATIONS=n	2024-04-25 15:47:39 +02:00
cpu_pm.c
crash_core.c
crash_reserve.c
cred.c
delayacct.c
dma.c
elfcorehdr.c
exec_domain.c
exit.c
exit.h
extable.c
fail_function.c
fork.c	fork: defer linking file vma until vma is fully initialized	2024-04-16 15:39:51 -07:00
freezer.c
gen_kheaders.sh
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c
kallsyms_internal.h
kallsyms_selftest.c
kallsyms_selftest.h
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.kexec
Kconfig.locks
Kconfig.preempt
kcov.c
kexec.c
kexec_core.c
kexec_elf.c
kexec_file.c
kexec_internal.h
kheaders.c
kprobes.c	kprobes: Fix possible use-after-free issue on kprobe registration	2024-04-10 23:35:51 +09:00
ksyms_common.c
ksysfs.c
kthread.c
latencytop.c
Makefile
module_signature.c
notifier.c
nsproxy.c
numa.c
padata.c
panic.c
params.c
pid.c
pid_namespace.c
pid_sysctl.h
profile.c	profiling: Remove create_prof_cpu_mask().	2024-04-27 11:17:48 -07:00
ptrace.c
range.c
reboot.c
regset.c
relay.c
resource.c
resource_kunit.c
rseq.c
scftorture.c
scs.c
seccomp.c
signal.c
smp.c
smpboot.c
smpboot.h
softirq.c	softirq: Fix suspicious RCU usage in __do_softirq()	2024-04-29 05:03:51 +02:00
stackleak.c
stacktrace.c
static_call.c
static_call_inline.c
stop_machine.c
sys.c
sys_ni.c
sysctl-test.c
sysctl.c
task_work.c
taskstats.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user-return-notifier.c
user.c
user_namespace.c
usermode_driver.c
utsname.c
utsname_sysctl.c
vhost_task.c
vmcore_info.c	mm: turn folio_test_hugetlb into a PageType	2024-04-24 19:34:26 -07:00
watch_queue.c
watchdog.c
watchdog_buddy.c
watchdog_perf.c
workqueue.c	workqueue: Fix divide error in wq_update_node_max_active()	2024-04-24 07:23:06 -10:00
workqueue_internal.h