* **Set Emptypoll Max**: Set the number of empty polls to wait before entering
sleep state.
+* **Get Pause Duration**: Get the configured duration (microseconds) to be used
+ in the Pause callback.
+
+* **Set Pause Duration**: Set the duration of the pause (microseconds) used in
+ the Pause mode callback.
+
References
----------
#include "rte_power_pmd_mgmt.h"
unsigned int emptypoll_max;
+unsigned int pause_duration;
/* store some internal state */
static struct pmd_conf_data {
struct queue_list_entry *queue_conf = arg;
struct pmd_core_cfg *lcore_conf;
const bool empty = nb_rx == 0;
+ uint32_t pause_duration = rte_power_pmd_mgmt_get_pause_duration();
lcore_conf = &lcore_cfgs[lcore];
if (global_data.intrinsics_support.power_pause) {
const uint64_t cur = rte_rdtsc();
const uint64_t wait_tsc =
- cur + global_data.tsc_per_us;
+ cur + global_data.tsc_per_us * pause_duration;
rte_power_pause(wait_tsc);
} else {
uint64_t i;
- for (i = 0; i < global_data.pause_per_us; i++)
+ for (i = 0; i < global_data.pause_per_us * pause_duration; i++)
rte_pause();
}
}
return emptypoll_max;
}
+int
+rte_power_pmd_mgmt_set_pause_duration(unsigned int duration)
+{
+ if (duration == 0) {
+ RTE_LOG(ERR, POWER, "Pause duration must be greater than 0, value unchanged");
+ return -EINVAL;
+ }
+ pause_duration = duration;
+
+ return 0;
+}
+
+unsigned int
+rte_power_pmd_mgmt_get_pause_duration(void)
+{
+ return pause_duration;
+}
+
RTE_INIT(rte_power_ethdev_pmgmt_init) {
size_t i;
/* initialize config defaults */
emptypoll_max = 512;
+ pause_duration = 1;
}
unsigned int
rte_power_pmd_mgmt_get_emptypoll_max(void);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice.
+ *
+ * Set the pause_duration. Used to adjust the pause mode callback duration.
+ *
+ * @note Duration must be greater than zero.
+ *
+ * @param duration
+ * The value to set pause_duration to.
+ * @return
+ * 0 on success
+ * <0 on error
+ */
+__rte_experimental
+int
+rte_power_pmd_mgmt_set_pause_duration(unsigned int duration);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice.
+ *
+ * Get the current value of pause_duration.
+ *
+ * @return
+ * The current pause_duration value.
+ */
+__rte_experimental
+unsigned int
+rte_power_pmd_mgmt_get_pause_duration(void);
+
#ifdef __cplusplus
}
#endif