test: Don't disable turbo on AMD instances

We would like to observer the effect on stability of our performance tests
on AMD instances with turbo not disabled.

Signed-off-by: Jack Thomson <[email protected]>

Author: JackThomson2

tools/devtool

@@ -628,11 +628,10 @@ apply_linux_61_tweaks() {
 
 # Modifies the processors CPU governor and P-state configuration (x86_64 only) for consistent performance. This means
 # - Disable turbo boost (Intel only) by writing 1 to /sys/devices/system/cpu/intel_pstate/no_turbo
-# - Disable turbo boost (AMD only) by writing 0 to /sys/devices/system/cpu/cpufreq/boost
 # - Lock the CPUs' P-state to the highest non-turbo one (Intel only) by writing 100 to /sys/devices/system/cpu/intel_pstate/{min,max}_perf_pct
 # - Set the cpu frequency governor to performance by writing "performance" to /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
 apply_performance_tweaks() {
-  # m6a instances do not support the amd_pstate driver (yet), so nothing we can do there
+  # AMD instances do not support the amd_pstate driver (yet), so nothing we can do there
   if [[ -d /sys/devices/system/cpu/intel_pstate ]]; then
     # Disable turbo boost. Some of our tests are performance tests, and we want minimum variability wrt processor frequency
     # See also https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/processor_state_control.html
@@ -647,8 +646,6 @@ apply_performance_tweaks() {
     # https://www.kernel.org/doc/html/v4.12/admin-guide/pm/intel_pstate.html
     echo 100 |sudo tee /sys/devices/system/cpu/intel_pstate/min_perf_pct &> /dev/null
     echo 100 |sudo tee /sys/devices/system/cpu/intel_pstate/max_perf_pct &> /dev/null
-  elif [[ -f /sys/devices/system/cpu/cpufreq/boost ]]; then
-    echo 0 |sudo tee /sys/devices/system/cpu/cpufreq/boost &> /dev/null
   fi
 
   # The governor is a linux component that can adjust CPU frequency. "performance" tells it to always run CPUs at
@@ -665,8 +662,6 @@ unapply_performance_tweaks() {
     # restore p-state limits
     echo $MIN_PERF_PCT |sudo tee /sys/devices/system/cpu/intel_pstate/min_perf_pct &> /dev/null
     echo $MAX_PERF_PCT |sudo tee /sys/devices/system/cpu/intel_pstate/max_perf_pct &> /dev/null
-  elif [[ -f /sys/devices/system/cpu/cpufreq/boost ]]; then
-    echo 1 | sudo tee /sys/devices/system/cpu/cpufreq/boost &> /dev/null
   fi
 
   # We do not reset the governor, as keeping track of each CPUs configured governor is not trivial here. On our CI