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| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2026-02-23 15:44:18 -0500 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2026-07-23 09:59:38 -0700 |
| commit | 2aaef4a4ff3387a2603d8f7ca9fee573d1d9ec73 (patch) | |
| tree | 9e719755c209ebe710ab86a493da06058ab7c7b5 | |
| parent | 9d30872a4c09c2e8a97084ef1fe6913f6bf9e34d (diff) | |
| download | linux-next-2aaef4a4ff3387a2603d8f7ca9fee573d1d9ec73.tar.gz linux-next-2aaef4a4ff3387a2603d8f7ca9fee573d1d9ec73.zip | |
hazptr: Add refscale test
Add the refscale test for hazptr to measure the reader side
performance.
Co-developed-by: Boqun Feng <boqun@kernel.org>
Signed-off-by: Boqun Feng <boqun@kernel.org>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: <rcu@vger.kernel.org>
Cc: <lkmm@lists.linux.dev>
| -rw-r--r-- | kernel/rcu/refscale.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c index a2d9d75d88a1..2320b3fedec7 100644 --- a/kernel/rcu/refscale.c +++ b/kernel/rcu/refscale.c @@ -29,6 +29,7 @@ #include <linux/reboot.h> #include <linux/sched.h> #include <linux/seq_buf.h> +#include <linux/hazptr.h> #include <linux/spinlock.h> #include <linux/smp.h> #include <linux/stat.h> @@ -1200,6 +1201,47 @@ static const struct ref_scale_ops typesafe_seqlock_ops = { .name = "typesafe_seqlock" }; +static void ref_hazptr_read_section(const int nloops) +{ + static void *ref_hazptr_read_section_ptr = ref_hazptr_read_section; + int i; + + for (i = nloops; i >= 0; i--) { + struct hazptr_ctx ctx; + void *addr; + + addr = hazptr_acquire(&ctx, &ref_hazptr_read_section_ptr); + hazptr_release(&ctx, addr); + } +} + +static void ref_hazptr_delay_section(const int nloops, const int udl, const int ndl) +{ + static void *ref_hazptr_delay_section_ptr = ref_hazptr_delay_section; + int i; + + for (i = nloops; i >= 0; i--) { + struct hazptr_ctx ctx; + void *addr; + + addr = hazptr_acquire(&ctx, &ref_hazptr_delay_section_ptr); + un_delay(udl, ndl); + hazptr_release(&ctx, addr); + } +} + +static bool ref_hazptr_init(void) +{ + return true; +} + +static const struct ref_scale_ops hazptr_ops = { + .init = ref_hazptr_init, + .readsection = ref_hazptr_read_section, + .delaysection = ref_hazptr_delay_section, + .name = "hazptr" +}; + static void rcu_scale_one_reader(void) { if (readdelay <= 0) @@ -1504,6 +1546,7 @@ ref_scale_init(void) &sched_clock_ops, &clock_ops, &jiffies_ops, &preempt_ops, &bh_ops, &irq_ops, &irqsave_ops, &typesafe_ref_ops, &typesafe_lock_ops, &typesafe_seqlock_ops, + &hazptr_ops, }; if (!torture_init_begin(scale_type, verbose)) |