Created attachment 127092 [details] screensot yakuake, konsole and qterminal when run konsole (standalone or throuth dolphin) nproc or do a run multicore process, the number of cores is set wrongly see attach up: yakuake left: Konsole right: qterminal EXPECTED RESULT show the real number of cores/threads (40 in my case) SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.18.3 KDE Frameworks Version: 5.68.0 Qt Version: 5.14/5.15 ADDITIONAL INFORMATION i have set isolcpus=10,11,22,23,34,35,46,47 nohz_full=10,11,22,23,34,35,46,47 rcu_nocbs=10,11,22,23,34,35,46,47 in boot. I need these cores for Virtualization (libvirt+cpupinned) lscpu: └───╼ lscpu Arquitectura: x86_64 modo(s) de operación de las CPUs: 32-bit, 64-bit Orden de los bytes: Little Endian Tamaños de las direcciones: 46 bits physical, 48 bits virtual CPU(s): 48 Lista de la(s) CPU(s) en línea: 0-47 Hilo(s) de procesamiento por núcleo: 2 Núcleo(s) por «socket»: 12 «Socket(s)» 2 Modo(s) NUMA: 2 ID de fabricante: GenuineIntel Familia de CPU: 6 Modelo: 79 Nombre del modelo: Genuine Intel(R) CPU 0000 @ 2.20GHz (Engineering Sample) Revisión: 0 CPU MHz: 2195.060 CPU MHz máx.: 2200,0000 CPU MHz mín.: 1200,0000 BogoMIPS: 4391.16 Virtualización: VT-x Caché L1d: 768 KiB Caché L1i: 768 KiB Caché L2: 6 MiB Caché L3: 60 MiB CPU(s) del nodo NUMA 0: 0-11,24-35 CPU(s) del nodo NUMA 1: 12-23,36-47 Vulnerability: secret ;) Indicadores: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 invpcid_single pti intel_ppin tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm arat pln pts working as spected since ages. seems is a regression. i'm not sure when start failed
Htop (in yakuake) when run multicore proccess on konsole https://i.ibb.co/YdYLj0z/Screenshot-20200329-192231.png same process run in yakuake https://i.ibb.co/SXJ75C3/Screenshot-20200329-193114.png
All of these are on the same system? I can't see how Konsole is related; nproc is from the distro.
yes. same system, same session, same DE, same time...
It seems because Konsole gets a different set of environment variables. In particular, check OMP_NUM_THREADS and OMP_THREAD_LIMIT. nproc --help says: "Print the number of processing units available to the current process, which may be less than the number of online processors".
if nproc show the nimber of cores by OMP_NUM_THREADS and OMP_THREAD_LIMIT (never set in my system ┌─┤[$]|[sl1pkn07]|[sL1pKn07]|[~]| └───╼ echo $OMP_NUM_THREADS ┌─┤[$]|[sl1pkn07]|[sL1pKn07]|[~]| └───╼ echo $OMP_THREAD_LIMIT ┌─┤[$]|[sl1pkn07]|[sL1pKn07]|[~]| └───╼ Hi then why if i do a multicore processor (like showed it in https://bugs.kde.org/show_bug.cgi?id=419388#c1), the process set wrongly in konsole but not in yakuake if nproc is not involve in the process?
I don't know which other variables are responsible, but Konsole certainly does not change the output of nproc. Please check also check "nproc --all".
`nproc --all` show all cores (include the cores setted as nohz_full/isolcpus in grub) 48