https://bugs.dpdk.org/show_bug.cgi?id=668
Bug ID: 668
Summary: DPDK power governor fails if base_frequency is not
opened
Product: DPDK
Version: 20.11
Hardware: x86
OS: Linux
Status: UNCONFIRMED
Severity: major
Priority: Normal
Component: other
Assignee: dev@dpdk.org
Reporter: michallinuxst...@gmail.com
Target Milestone: ---
DPDK fails to initialize pstate cpufreq in case base_frequency is missing from
sysfs under given cpu. This is a bit problematic now since this particular attr
exists only under specific conditions: active intel_pstate + HWP supported by
the cpu. Also, from the commit itself (4db9587bbf) it looks like this was put
in place by accident since the part which accepts missing base_frequency (and
which sets it to 0) still exists, i.e.:
snprintf(fullpath_base, sizeof(fullpath_base), POWER_SYSFILE_BASE_FREQ,
pi->lcore_id);
f_base = fopen(fullpath_base, "r");
FOPEN_OR_ERR_RET(f_base, -1); /* <- point of failure */
if (f_base == NULL) {
/* No sysfs base_frequency, that's OK, continue without */
base_ratio = 0;
Initially noticed under https://github.com/spdk/spdk/issues/1859.
Any feedback on the matter would be appreciate. :)
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