From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
To: Joyce Kong <joyce.kong@arm.com>,
thomas@monjalon.net, david.marchand@redhat.com,
roretzla@linux.microsoft.com, stephen@networkplumber.org,
olivier.matz@6wind.com, harry.van.haaren@intel.com,
honnappa.nagarahalli@arm.com, ruifeng.wang@arm.com
Cc: dev@dpdk.org, nd@arm.com
Subject: Re: [dpdk-dev] [PATCH v3 8/8] test/rcu: use compiler atomics for data sync
Date: Fri, 23 Jul 2021 22:52:02 +0300 [thread overview]
Message-ID: <1eda5308-51b7-c9d2-4837-5bdb43586641@oktetlabs.ru> (raw)
In-Reply-To: <20210720035125.14214-9-joyce.kong@arm.com>
On 7/20/21 6:51 AM, Joyce Kong wrote:
> Covert rte_atomic usages to compiler atomic built-ins in
> rcu_perf testcases.
>
> Signed-off-by: Joyce Kong <joyce.kong@arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
> Acked-by: Stephen Hemminger <stephen@networkplumber.org>
> ---
> app/test/test_rcu_qsbr_perf.c | 98 +++++++++++++++++------------------
> 1 file changed, 49 insertions(+), 49 deletions(-)
>
> diff --git a/app/test/test_rcu_qsbr_perf.c b/app/test/test_rcu_qsbr_perf.c
> index 3017e71120..cf7b158d22 100644
> --- a/app/test/test_rcu_qsbr_perf.c
> +++ b/app/test/test_rcu_qsbr_perf.c
> @@ -30,8 +30,8 @@ static volatile uint32_t thr_id;
> static struct rte_rcu_qsbr *t[RTE_MAX_LCORE];
> static struct rte_hash *h;
> static char hash_name[8];
> -static rte_atomic64_t updates, checks;
> -static rte_atomic64_t update_cycles, check_cycles;
> +static uint64_t updates, checks;
> +static uint64_t update_cycles, check_cycles;
>
> /* Scale down results to 1000 operations to support lower
> * granularity clocks.
> @@ -81,8 +81,8 @@ test_rcu_qsbr_reader_perf(void *arg)
> }
>
> cycles = rte_rdtsc_precise() - begin;
> - rte_atomic64_add(&update_cycles, cycles);
> - rte_atomic64_add(&updates, loop_cnt);
> + __atomic_fetch_add(&update_cycles, cycles, __ATOMIC_RELAXED);
> + __atomic_fetch_add(&updates, loop_cnt, __ATOMIC_RELAXED);
Shouldn't __atomic_add_fetch() be used instead since it pseudo-code is
a bit simpler. What is the best option if return value is not actually
used?
next prev parent reply other threads:[~2021-07-23 19:52 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-04 9:46 [dpdk-dev] [PATCH v1 0/8] use GCC's C11 atomic builtins for test Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 1/8] test/ticketlock: use GCC atomic builtins for lcores sync Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 2/8] test/spinlock: " Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 3/8] test/rwlock: " Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 4/8] test/mcslock: " Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 5/8] test/mempool: remove unused variable " Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 6/8] test/mempool_perf: use GCC atomic builtins " Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 7/8] test/service_cores: use GCC atomic builtins for lock sync Joyce Kong
2021-06-04 9:46 ` [dpdk-dev] [PATCH v1 8/8] test/rcu_perf: use GCC atomic builtins for data sync Joyce Kong
2021-06-04 19:57 ` [dpdk-dev] [PATCH v1 0/8] use GCC's C11 atomic builtins for test Stephen Hemminger
2021-06-11 8:40 ` David Marchand
2021-06-11 10:45 ` Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 " Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 1/8] test/ticketlock: use GCC atomic builtins for lcores sync Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 2/8] test/spinlock: " Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 3/8] test/rwlock: " Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 4/8] test/mcslock: " Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 5/8] test/mempool: remove unused variable " Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 6/8] test/mempool_perf: use GCC atomic builtins " Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 7/8] test/service_cores: use GCC atomic builtins for lock sync Joyce Kong
2021-06-16 2:54 ` [dpdk-dev] [PATCH v2 8/8] test/rcu: use GCC atomic builtins for data sync Joyce Kong
2021-06-17 15:21 ` [dpdk-dev] [PATCH v2 0/8] use GCC's C11 atomic builtins for test Tyler Retzlaff
2021-06-17 23:26 ` Honnappa Nagarahalli
2021-06-23 10:24 ` Thomas Monjalon
2021-06-23 16:02 ` Tyler Retzlaff
2021-06-29 17:04 ` Honnappa Nagarahalli
2021-06-30 18:51 ` Tyler Retzlaff
2021-06-30 19:06 ` Honnappa Nagarahalli
2021-06-30 19:38 ` Tyler Retzlaff
2021-06-30 20:25 ` Honnappa Nagarahalli
2021-06-30 21:49 ` Tyler Retzlaff
2021-06-30 22:41 ` Honnappa Nagarahalli
2021-07-13 7:28 ` Joyce Kong
2021-07-14 11:44 ` Thomas Monjalon
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 0/8] use compiler " Joyce Kong
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 1/8] test/ticketlock: use compiler atomics for lcores sync Joyce Kong
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 2/8] test/spinlock: use compile " Joyce Kong
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 3/8] test/rwlock: use compiler " Joyce Kong
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 4/8] test/mcslock: " Joyce Kong
2021-07-28 9:56 ` Olivier Matz
2021-07-29 7:19 ` Joyce Kong
2021-07-29 7:58 ` Olivier Matz
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 5/8] test/mempool: remove unused variable " Joyce Kong
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 6/8] test/mempool_perf: use compiler atomics " Joyce Kong
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 7/8] test/service_cores: use compiler atomics for lock sync Joyce Kong
2021-07-20 3:51 ` [dpdk-dev] [PATCH v3 8/8] test/rcu: use compiler atomics for data sync Joyce Kong
2021-07-23 19:52 ` Andrew Rybchenko [this message]
2021-07-28 7:07 ` Joyce Kong
2021-07-30 21:58 ` [dpdk-dev] [PATCH v3 0/8] use compiler atomic builtins for test Thomas Monjalon
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