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examples/kni: use compiler atomics for status sync

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Convert rte_atomic usages to compiler atomic builit-ins
for kni_stop and kni_pause sync.

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
This commit is contained in:
Joyce Kong 2021-10-13 13:54:02 -05:00 committed by David Marchand
parent 9b882c5b87
commit 6be26e3177
1 changed files with 13 additions and 14 deletions
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27
examples/kni/main.c
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@ -27,7 +27,6 @@
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_launch.h>
#include <rte_atomic.h>
#include <rte_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_interrupts.h>
@ -131,8 +130,8 @@ static int kni_change_mtu(uint16_t port_id, unsigned int new_mtu);
static int kni_config_network_interface(uint16_t port_id, uint8_t if_up);
static int kni_config_mac_address(uint16_t port_id, uint8_t mac_addr[]);
static rte_atomic32_t kni_stop = RTE_ATOMIC32_INIT(0);
static rte_atomic32_t kni_pause = RTE_ATOMIC32_INIT(0);
static uint32_t kni_stop;
static uint32_t kni_pause;
/* Print out statistics on packets handled */
static void
@ -185,7 +184,7 @@ signal_handler(int signum)
if (signum == SIGRTMIN || signum == SIGINT || signum == SIGTERM) {
printf("\nSIGRTMIN/SIGINT/SIGTERM received. "
"KNI processing stopping.\n");
rte_atomic32_inc(&kni_stop);
__atomic_fetch_add(&kni_stop, 1, __ATOMIC_RELAXED);
return;
}
}
@ -311,8 +310,8 @@ main_loop(__rte_unused void *arg)
kni_port_params_array[i]->lcore_rx,
kni_port_params_array[i]->port_id);
while (1) {
f_stop = rte_atomic32_read(&kni_stop);
f_pause = rte_atomic32_read(&kni_pause);
f_stop = __atomic_load_n(&kni_stop, __ATOMIC_RELAXED);
f_pause = __atomic_load_n(&kni_pause, __ATOMIC_RELAXED);
if (f_stop)
break;
if (f_pause)
@ -324,8 +323,8 @@ main_loop(__rte_unused void *arg)
kni_port_params_array[i]->lcore_tx,
kni_port_params_array[i]->port_id);
while (1) {
f_stop = rte_atomic32_read(&kni_stop);
f_pause = rte_atomic32_read(&kni_pause);
f_stop = __atomic_load_n(&kni_stop, __ATOMIC_RELAXED);
f_pause = __atomic_load_n(&kni_pause, __ATOMIC_RELAXED);
if (f_stop)
break;
if (f_pause)
@ -856,9 +855,9 @@ kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
{
int ret;
rte_atomic32_inc(&kni_pause);
__atomic_fetch_add(&kni_pause, 1, __ATOMIC_RELAXED);
ret = kni_change_mtu_(port_id, new_mtu);
rte_atomic32_dec(&kni_pause);
__atomic_fetch_sub(&kni_pause, 1, __ATOMIC_RELAXED);
return ret;
}
@ -877,14 +876,14 @@ kni_config_network_interface(uint16_t port_id, uint8_t if_up)
RTE_LOG(INFO, APP, "Configure network interface of %d %s\n",
port_id, if_up ? "up" : "down");
rte_atomic32_inc(&kni_pause);
__atomic_fetch_add(&kni_pause, 1, __ATOMIC_RELAXED);
if (if_up != 0) { /* Configure network interface up */
ret = rte_eth_dev_stop(port_id);
if (ret != 0) {
RTE_LOG(ERR, APP, "Failed to stop port %d: %s\n",
port_id, rte_strerror(-ret));
rte_atomic32_dec(&kni_pause);
__atomic_fetch_sub(&kni_pause, 1, __ATOMIC_RELAXED);
return ret;
}
ret = rte_eth_dev_start(port_id);
@ -893,12 +892,12 @@ kni_config_network_interface(uint16_t port_id, uint8_t if_up)
if (ret != 0) {
RTE_LOG(ERR, APP, "Failed to stop port %d: %s\n",
port_id, rte_strerror(-ret));
rte_atomic32_dec(&kni_pause);
__atomic_fetch_sub(&kni_pause, 1, __ATOMIC_RELAXED);
return ret;
}
}
rte_atomic32_dec(&kni_pause);
__atomic_fetch_sub(&kni_pause, 1, __ATOMIC_RELAXED);
if (ret < 0)
RTE_LOG(ERR, APP, "Failed to start port %d\n", port_id);