[PATCH] benchtests: Add pthread mutex trylock recursive throughput test (BZ #33704)

[H.J. Lu]

On Wed, Dec 17, 2025 at 8:39 AM Sunil K Pandey <sunil.k.pandey@intel.com> wrote:
>
> This benchmark measures number of successful updates per second
> under high cache contention.
>
> Tested on x86_64.
> ---
>  benchtests/Makefile                           |  2 ++
>  ...hread-mutex-trylock-recursive-throughput.c | 21 +++++++++++++++++++
>  2 files changed, 23 insertions(+)
>  create mode 100644 benchtests/bench-pthread-mutex-trylock-recursive-throughput.c
>
> diff --git a/benchtests/Makefile b/benchtests/Makefile
> index c3368a7603..59f4503ebb 100644
> --- a/benchtests/Makefile
> +++ b/benchtests/Makefile
> @@ -175,6 +175,7 @@ bench-pthread := \
>    pthread-locks \
>    pthread-mutex-lock \
>    pthread-mutex-trylock \
> +  pthread-mutex-trylock-recursive-throughput \
>    pthread-mutex-trylock-throughput \
>    pthread-spin-lock \
>    pthread-spin-trylock \
> @@ -189,6 +190,7 @@ bench-resolv := \
>
>  LDLIBS-bench-pthread-mutex-lock += -lm
>  LDLIBS-bench-pthread-mutex-trylock += -lm
> +LDLIBS-bench-pthread-mutex-trylock-recursive-throughput += -lm
>  LDLIBS-bench-pthread-mutex-trylock-throughput += -lm
>  LDLIBS-bench-pthread-spin-lock += -lm
>  LDLIBS-bench-pthread-spin-trylock += -lm
> diff --git a/benchtests/bench-pthread-mutex-trylock-recursive-throughput.c b/benchtests/bench-pthread-mutex-trylock-recursive-throughput.c
> new file mode 100644
> index 0000000000..9bfc4f1140
> --- /dev/null
> +++ b/benchtests/bench-pthread-mutex-trylock-recursive-throughput.c
> @@ -0,0 +1,21 @@
> +/* Measure pthread trylock recursive throughput under high cache contention.
> +   Copyright (C) 2025 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#define TEST_NAME "pthread-mutex-trylock-recursive-throughput"
> +#define PTHREAD_MUTEX_TYPE_INITIALIZER PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
> +#include "bench-pthread-mutex-trylock-base.c"
> --
> 2.51.0
>

LGTM.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

Thanks.

-- 
H.J.