[dpdk-dev] [PATCH] lib/librte_power: set new frequecy on turbo_disable

[Lee Daly <lee.daly@intel.com>]

This patch will ensure the correct max frequency of a core is set in
the lcore_power_info struct when disabling turbo, while using the
intel pstate driver.

Fixes: e6c6dc0f96c8 ("power: add p-state driver compatibility")
Cc: liang.j.ma@intel.com
Cc: stable@dpdk.org

Signed-off-by: Lee Daly <lee.daly@intel.com>
---
 lib/librte_power/power_pstate_cpufreq.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/librte_power/power_pstate_cpufreq.c b/lib/librte_power/power_pstate_cpufreq.c
index 336c13869..d2ac75123 100644
--- a/lib/librte_power/power_pstate_cpufreq.c
+++ b/lib/librte_power/power_pstate_cpufreq.c
@@ -810,7 +810,15 @@ power_pstate_disable_turbo(unsigned int lcore_id)
 
 	pi->turbo_enable = 0;
 
-
+	if ((pi->turbo_available) && (pi->curr_idx <= 1)) {
+		/* Try to set freq to max by default coming out of turbo */
+		if (power_pstate_cpufreq_freq_max(lcore_id) < 0) {
+			RTE_LOG(ERR, POWER,
+				"Failed to set frequency of lcore %u to max\n",
+				lcore_id);
+			return -1;
+		}
+	}
 	return 0;
 }
 
-- 
2.17.1