From: Lee Daly <lee.daly@intel.com>
Date: Fri, 12 Apr 2019 15:57:27 +0000 (+0100)
Subject: power: fix max frequency after turbo disabling
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=a0d15e43e42b158e25b9ad13052368ba22ecf113;p=dpdk.git

power: fix max frequency after turbo disabling

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: stable@dpdk.org

Signed-off-by: Lee Daly <lee.daly@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
Acked-by: Liang Ma <liang.j.ma@intel.com>
---

diff --git a/lib/librte_power/power_pstate_cpufreq.c b/lib/librte_power/power_pstate_cpufreq.c
index 336c13869d..c2c4e8e144 100644
--- a/lib/librte_power/power_pstate_cpufreq.c
+++ b/lib/librte_power/power_pstate_cpufreq.c
@@ -810,6 +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;
 }