read_mhz() sets cpu->mhz_min_freq from /sys/devices/system/cpu/cpuN/ cpufreq/cpuinfo_min_freq. The file read fails if cpuN is offline and cpu->mhz_min_freq is left as 0. 0 MHz is treated as invalid frequency. lsblk_cputype_get_minmhz() iterates through all possible CPUs to find the minimum frequency. If one or more CPUs are offline, the minimum frequency will be 0. This is reflected in the output of lscpu: $ ./lscpu | grep min CPU min MHz: 0.0000 Ignore 0-MHz frequencies to find the actual minimum frequency: $ ./lscpu | grep min CPU min MHz: 1200.0000 Reported-by: Thangamani Krishnan <thangamani.krishnan@xxxxxxxxx> Signed-off-by: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx> --- sys-utils/lscpu-topology.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys-utils/lscpu-topology.c b/sys-utils/lscpu-topology.c index 547a3aca0..36a217bc7 100644 --- a/sys-utils/lscpu-topology.c +++ b/sys-utils/lscpu-topology.c @@ -660,6 +660,8 @@ float lsblk_cputype_get_minmhz(struct lscpu_cxt *cxt, struct lscpu_cputype *ct) if (!cpu || cpu->type != ct || !is_cpu_present(cxt, cpu)) continue; + if (!cpu->mhz_min_freq) + continue; if (res < 0.0 || cpu->mhz_min_freq < res) res = cpu->mhz_min_freq; } -- 2.34.1
