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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-09-09 12:27:03 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-11-06 17:13:50 -0800 |
| commit | 899f317e4886f916ed21027177177c11b577cea1 (patch) | |
| tree | 2255984e2d7976804dbc5ded071828302fd1ecf4 /kernel/rcu | |
| parent | 1ac78b49d61d4a095ef8b861542549eef1823f36 (diff) | |
| download | linux-899f317e4886f916ed21027177177c11b577cea1.tar.gz | |
rcuscale: Add RCU Tasks Trace
This commit adds the ability to test performance and scalability of RCU Tasks Trace updaters. Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcuscale.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c index 2819b95479af..c42f2401c374 100644 --- a/kernel/rcu/rcuscale.c +++ b/kernel/rcu/rcuscale.c @@ -38,6 +38,7 @@ #include <asm/byteorder.h> #include <linux/torture.h> #include <linux/vmalloc.h> +#include <linux/rcupdate_trace.h> #include "rcu.h" @@ -294,6 +295,35 @@ static struct rcu_scale_ops tasks_ops = { .name = "tasks" }; +/* + * Definitions for RCU-tasks-trace scalability testing. + */ + +static int tasks_trace_scale_read_lock(void) +{ + rcu_read_lock_trace(); + return 0; +} + +static void tasks_trace_scale_read_unlock(int idx) +{ + rcu_read_unlock_trace(); +} + +static struct rcu_scale_ops tasks_tracing_ops = { + .ptype = RCU_TASKS_FLAVOR, + .init = rcu_sync_scale_init, + .readlock = tasks_trace_scale_read_lock, + .readunlock = tasks_trace_scale_read_unlock, + .get_gp_seq = rcu_no_completed, + .gp_diff = rcu_seq_diff, + .async = call_rcu_tasks_trace, + .gp_barrier = rcu_barrier_tasks_trace, + .sync = synchronize_rcu_tasks_trace, + .exp_sync = synchronize_rcu_tasks_trace, + .name = "tasks-tracing" +}; + static unsigned long rcuscale_seq_diff(unsigned long new, unsigned long old) { if (!cur_ops->gp_diff) @@ -754,7 +784,7 @@ rcu_scale_init(void) long i; int firsterr = 0; static struct rcu_scale_ops *scale_ops[] = { - &rcu_ops, &srcu_ops, &srcud_ops, &tasks_ops, + &rcu_ops, &srcu_ops, &srcud_ops, &tasks_ops, &tasks_tracing_ops }; if (!torture_init_begin(scale_type, verbose)) |