[v7,2/2] examples/l3fwd-power: add PM QoS configuration
Checks
Commit Message
Add PM QoS configuration to declease the delay after sleep in case of
entering deeper idle state.
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
---
examples/l3fwd-power/main.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
@@ -47,6 +47,7 @@
#include <rte_telemetry.h>
#include <rte_power_pmd_mgmt.h>
#include <rte_power_uncore.h>
+#include <rte_power_qos.h>
#include "perf_core.h"
#include "main.h"
@@ -2259,6 +2260,22 @@ init_power_library(void)
return -1;
}
}
+
+ RTE_LCORE_FOREACH(lcore_id) {
+ /*
+ * Set the worker lcore's to have strict latency limit to allow
+ * the CPU to enter the shallowest idle state.
+ */
+ ret = rte_power_qos_set_cpu_resume_latency(lcore_id,
+ RTE_POWER_QOS_STRICT_LATENCY_VALUE);
+ if (ret < 0) {
+ RTE_LOG(ERR, L3FWD_POWER,
+ "Failed to set strict resume latency on CPU%u.\n",
+ lcore_id);
+ return ret;
+ }
+ }
+
return ret;
}
@@ -2298,6 +2315,13 @@ deinit_power_library(void)
}
}
}
+
+ RTE_LCORE_FOREACH(lcore_id) {
+ /* Restore the original value in kernel. */
+ rte_power_qos_set_cpu_resume_latency(lcore_id,
+ RTE_POWER_QOS_RESUME_LATENCY_NO_CONSTRAINT);
+ }
+
return ret;
}