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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-10-09 11:02:49 -0700 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-12-14 16:16:33 +0100 |
| commit | 1806b1f97f7ab0bb8bda7c117b2573a335cea940 (patch) | |
| tree | 366c503a43b480157c03233bc436e5dfdb131f6a | |
| parent | fac04efc5c793dccbd07e2d59af9f90b7fc0dca4 (diff) | |
refscale: Add test for sched_clock()
This commit adds a "sched-clock" test for the sched_clock() function.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
| -rw-r--r-- | kernel/rcu/refscale.c | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c index aacfcc9838b3..1b47376acdc4 100644 --- a/kernel/rcu/refscale.c +++ b/kernel/rcu/refscale.c @@ -36,6 +36,7 @@ #include <linux/slab.h> #include <linux/torture.h> #include <linux/types.h> +#include <linux/sched/clock.h> #include "rcu.h" @@ -531,6 +532,39 @@ static const struct ref_scale_ops acqrel_ops = { static volatile u64 stopopts; +static void ref_sched_clock_section(const int nloops) +{ + u64 x = 0; + int i; + + preempt_disable(); + for (i = nloops; i >= 0; i--) + x += sched_clock(); + preempt_enable(); + stopopts = x; +} + +static void ref_sched_clock_delay_section(const int nloops, const int udl, const int ndl) +{ + u64 x = 0; + int i; + + preempt_disable(); + for (i = nloops; i >= 0; i--) { + x += sched_clock(); + un_delay(udl, ndl); + } + preempt_enable(); + stopopts = x; +} + +static const struct ref_scale_ops sched_clock_ops = { + .readsection = ref_sched_clock_section, + .delaysection = ref_sched_clock_delay_section, + .name = "sched-clock" +}; + + static void ref_clock_section(const int nloops) { u64 x = 0; @@ -1130,9 +1164,9 @@ ref_scale_init(void) int firsterr = 0; static const struct ref_scale_ops *scale_ops[] = { &rcu_ops, &srcu_ops, &srcu_lite_ops, RCU_TRACE_OPS RCU_TASKS_OPS - &refcnt_ops, &rwlock_ops, &rwsem_ops, &lock_ops, &lock_irq_ops, &acqrel_ops, - &clock_ops, &jiffies_ops, &typesafe_ref_ops, &typesafe_lock_ops, - &typesafe_seqlock_ops, + &refcnt_ops, &rwlock_ops, &rwsem_ops, &lock_ops, &lock_irq_ops, + &acqrel_ops, &sched_clock_ops, &clock_ops, &jiffies_ops, + &typesafe_ref_ops, &typesafe_lock_ops, &typesafe_seqlock_ops, }; if (!torture_init_begin(scale_type, verbose)) |