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fix: add no_turbo option in profiles where boost is used

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- When boost=0 is set on Intel systems with intel_pstate driver, it automatically sets no_turbo=1

Resolves: #788
Signed-off-by: Suyash Nalawade <sunalawa@redhat.com>
This commit is contained in:
Suyash Nalawade 2025-08-11 14:18:24 +05:30
parent 3554d5b3b6
commit d33fc7928f
1 changed files with 25 additions and 2 deletions
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27
tuned/plugins/plugin_cpu.py
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@ -190,7 +190,9 @@ class CPULatencyPlugin(hotplug.Plugin):
`boost`:::
The [option]`boost` option allows the CPU to boost above nominal
frequencies for shorts periods of time.
frequencies for shorts periods of time. On Intel systems with the
intel_pstate driver, setting boost=0 will automatically set no_turbo=1
to ensure boost is properly disabled.
+
.Allowing CPU boost
====
@ -771,17 +773,38 @@ class CPULatencyPlugin(hotplug.Plugin):
log.debug("%s is not online, skipping" % device)
return None
cpu_id = device.lstrip("cpu")
boost_set = False
if os.path.exists(self._pstate_boost_path(cpu_id)):
if not sim:
if boost == "0" or boost == "1":
self._cmd.write_to_file(self._pstate_boost_path(cpu_id), boost, \
no_error = [errno.ENOENT] if remove else False, ignore_same=True)
log.info("Setting boost value '%s' for cpu '%s'" % (boost, device))
boost_set = True
else:
log.error("Failed to set boost on cpu '%s'. Is the value in the profile correct?" % device)
return str(boost)
else:
log.debug("boost file missing, which can happen on pre 6.11 kernels.")
# For Intel systems with intel_pstate driver, handle no_turbo
# This ensures boost=0 works properly on Intel CPUs
if self._has_intel_pstate and boost in ["0", "1"]:
no_turbo_val = "1" if boost == "0" else "0"
if not sim:
try:
self._set_intel_pstate_attr("no_turbo", no_turbo_val)
log.info("Setting no_turbo to '%s' for intel_pstate driver (boost=%s)" % (no_turbo_val, boost))
boost_set = True
except Exception as e:
log.warning("Failed to set no_turbo for intel_pstate: %s" % str(e))
if boost_set or sim:
return str(boost)
elif boost in ["0", "1"]:
log.warning("Unable to set boost on cpu '%s'. Neither per-policy boost nor intel_pstate no_turbo is available." % device)
return None
@command_get("boost")