From: Joyce Kong <joyce.kong@arm.com>
To: David Hunt <david.hunt@intel.com>
Cc: dev@dpdk.org, thomas@monjalon.net, david.marchand@redhat.com,
honnappa.nagarahalli@arm.com, ruifeng.wang@arm.com, nd@arm.com
Subject: [dpdk-dev] [PATCH v1 6/8] examples/vm_power_manager: use compiler atomics for sync
Date: Thu, 19 Aug 2021 02:09:06 -0500 [thread overview]
Message-ID: <20210819070908.25773-7-joyce.kong@arm.com> (raw)
In-Reply-To: <20210819070908.25773-1-joyce.kong@arm.com>
Convert rte_atomic32_cmpset to compiler atomic CAS
operation for channel status sync.
Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
examples/vm_power_manager/channel_monitor.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/examples/vm_power_manager/channel_monitor.c b/examples/vm_power_manager/channel_monitor.c
index 99f81544d7..3c20406f7c 100644
--- a/examples/vm_power_manager/channel_monitor.c
+++ b/examples/vm_power_manager/channel_monitor.c
@@ -25,7 +25,6 @@
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_malloc.h>
-#include <rte_atomic.h>
#include <rte_cycles.h>
#include <rte_ethdev.h>
#ifdef RTE_NET_I40E
@@ -829,8 +828,9 @@ process_request(struct rte_power_channel_packet *pkt,
if (chan_info == NULL)
return -1;
- if (rte_atomic32_cmpset(&(chan_info->status), CHANNEL_MGR_CHANNEL_CONNECTED,
- CHANNEL_MGR_CHANNEL_PROCESSING) == 0)
+ uint32_t channel_connected = CHANNEL_MGR_CHANNEL_CONNECTED;
+ if (__atomic_compare_exchange_n(&(chan_info->status), &channel_connected,
+ CHANNEL_MGR_CHANNEL_PROCESSING, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED) == 0)
return -1;
if (pkt->command == RTE_POWER_CPU_POWER) {
@@ -934,8 +934,9 @@ process_request(struct rte_power_channel_packet *pkt,
* Return is not checked as channel status may have been set to DISABLED
* from management thread
*/
- rte_atomic32_cmpset(&(chan_info->status), CHANNEL_MGR_CHANNEL_PROCESSING,
- CHANNEL_MGR_CHANNEL_CONNECTED);
+ uint32_t channel_processing = CHANNEL_MGR_CHANNEL_PROCESSING;
+ __atomic_compare_exchange_n(&(chan_info->status), &channel_processing,
+ CHANNEL_MGR_CHANNEL_CONNECTED, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED);
return 0;
}
--
2.17.1
next prev parent reply other threads:[~2021-08-19 7:10 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-19 7:09 [dpdk-dev] [PATCH v1 0/8] use compiler atomic builtins for examples Joyce Kong
2021-08-19 7:09 ` [dpdk-dev] [PATCH v1 1/8] examples/bbdev_app: use compiler atomics for flag sync Joyce Kong
2021-08-19 7:09 ` [dpdk-dev] [PATCH v1 2/8] examples/multi_process: use compiler atomics for sync Joyce Kong
2021-08-19 7:09 ` [dpdk-dev] [PATCH v1 3/8] examples/kni: use compiler atomics for status sync Joyce Kong
2021-08-19 7:09 ` [dpdk-dev] [PATCH v1 4/8] examples/performance-thread: use compiler atomics for sync Joyce Kong
2021-08-19 7:09 ` [dpdk-dev] [PATCH v1 5/8] examples/l2fwd-jobstats: use compiler atomics for stats sync Joyce Kong
2021-08-19 7:09 ` Joyce Kong [this message]
2021-08-19 7:09 ` [dpdk-dev] [PATCH v1 7/8] examples/server_node_efd: use compiler atomics for sync Joyce Kong
2021-08-19 7:09 ` [dpdk-dev] [PATCH v1 8/8] examples: remove unnecessary include of atomic Joyce Kong
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