How do I enable all four cores on my Toshiba P70-A notebook? (only one enabled now)
I recently noticed my computer is highly sluggish (recent install of Kubuntu 13.04 by the way). I have a Toshiba Satellite P70-A PSPLPC-01Y007 laptop with an Intel i7 quad-core, 16 GB of ram. It appears to look correct in the kinfo. So I ran mpstat -P ALL :
Linux 3.8.0-30-generic (Isogen) 13-09-02 _x86_64_ (1 CPU) 10:07:13 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 10:07:13 AM all 11.07 3.02 2.90 36.25 0.00 0.12 0.00 0.00 46.64 10:07:13 AM 0 11.07 3.02 2.90 36.25 0.00 0.12 0.00 0.00 46.64 I noticed when I had chrome open with 10 tabs, typical of an engineer, but it kept freezing horribly. After I ran top , I realized the CPU kept hitting 100% and only one CPU/core is listed. Couldn’t find a solution so far. How can I get it to register all 4 cores?
cat /proc/cpuinfo | grep -E "(core|model\ name)" model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz core id : 0 cpu cores : 1 sudo grep -i smp /var/log/syslog Sep 2 10:02:41 Isogen kernel: [ 0.000000] Linux version 3.8.0-30-generic (buildd@roseapple) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013 (Ubuntu 3.8.0-30.44-generic 3.8.13.6) Sep 2 10:02:41 Isogen kernel: [ 0.000000] found SMP MP-table at [mem 0x000fe1b0-0x000fe1bf] mapped at [ffff8800000fe1b0] Sep 2 10:02:41 Isogen kernel: [ 0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs Sep 2 10:02:41 Isogen kernel: [ 0.010390] Freeing SMP alternatives: 24k freed Sep 2 10:02:41 Isogen kernel: [ 0.062244] smpboot: CPU0: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz (fam: 06, model: 3c, stepping: 03) Sep 2 10:02:41 Isogen kernel: [ 0.063005] smpboot: Total of 1 processors activated (4788.97 BogoMIPS) Sep 2 11:18:52 Isogen kernel: [ 0.000000] Linux version 3.8.0-30-generic (buildd@roseapple) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013 (Ubuntu 3.8.0-30.44-generic 3.8.13.6) Sep 2 11:18:52 Isogen kernel: [ 0.000000] found SMP MP-table at [mem 0x000fe1b0-0x000fe1bf] mapped at [ffff8800000fe1b0] Sep 2 11:18:52 Isogen kernel: [ 0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs Sep 2 11:18:52 Isogen kernel: [ 0.010393] Freeing SMP alternatives: 24k freed Sep 2 11:18:52 Isogen kernel: [ 0.062271] smpboot: CPU0: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz (fam: 06, model: 3c, stepping: 03) Sep 2 11:18:52 Isogen kernel: [ 0.063032] smpboot: Total of 1 processors activated (4788.73 BogoMIPS) *-cpu description: CPU product: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz vendor: Intel Corp. physical id: 4 bus info: cpu@0 version: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz serial: To Be Filled By O.E.M. slot: U3E1 size: 2400MHz capacity: 2400MHz width: 64 bits clock: 100MHz capabilities: x86-64 fpu fpu_exception wp 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 constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid configuration: cores=4 enabledcores=4 threads=8 So it recognizes that it has 4 cores with 8 threads, as well as says that all 4 cores are enabled. It is also hyper-thread, so even if running only on one core, it should see two.
Unable to use all cores or threads
There are several threads on this subject, however none seem to help in my specific predicament. As the title suggests, I am unable to take advantage of all four cores and threads on my Intel i5-7600T CPU. It’s plugged into a MSI B150M ECO Motherboard. Please find additional output information below, and let me know if I left anything out. Thank you for your time and suggestions. lab_release -a
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.3 LTS Release: 16.04 Codename: xenial *-cpu description: CPU product: Intel(R) Core(TM) i5-7600T CPU @ 2.80GHz vendor: Intel Corp. physical id: 45 bus info: cpu@0 version: Intel(R) Core(TM) i5-7600T CPU @ 2.80GHz serial: To Be Filled By O.E.M. slot: U3E1 size: 3599MHz capacity: 4005MHz width: 64 bits clock: 100MHz capabilities: x86-64 fpu fpu_exception wp 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 constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp cpufreq configuration: cores=4 enabledcores=2 threads=2 # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD . ) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 158 model name : Intel(R) Core(TM) i5-7600T CPU @ 2.80GHz stepping : 9 microcode : 0x5e cpu MHz : 799.975 cache size : 6144 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 22 wp : yes flags : 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 art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp bugs : bogomips : 5616.00 clflush size : 64 cache_alignment : 64 address sizes : 39 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 158 model name : Intel(R) Core(TM) i5-7600T CPU @ 2.80GHz stepping : 9 microcode : 0x5e cpu MHz : 799.975 cache size : 6144 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 2 initial apicid : 2 fpu : yes fpu_exception : yes cpuid level : 22 wp : yes flags : 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 art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp bugs : bogomips : 5616.00 clflush size : 64 cache_alignment : 64 address sizes : 39 bits physical, 48 bits virtual power management: 0-1 drwxr-xr-x 10 root root 0 Aug 23 22:54 /sys/devices/system/cpu/cpu0 drwxr-xr-x 10 root root 0 Aug 23 22:54 /sys/devices/system/cpu/cpu1 drwxr-xr-x 4 root root 0 Aug 23 22:54 /sys/devices/system/cpu/cpufreq drwxr-xr-x 2 root root 0 Aug 23 22:54 /sys/devices/system/cpu/cpuidle Aug 23 22:37:10 Plexerver systemd[1]: Started LSB: daemon to balance interrupts for SMP systems. Aug 23 22:54:30 Plexerver systemd[1]: Starting LSB: daemon to balance interrupts for SMP systems. Aug 23 22:54:30 Plexerver kernel: [ 0.000000] Linux version 4.10.0-32-generic (buildd@lcy01-01) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4) ) #36~16.04.1-Ubuntu SMP Wed Aug 9 09:19:02 UTC 2017 (Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17) Aug 23 22:54:30 Plexerver kernel: [ 0.000000] found SMP MP-table at [mem 0x000fcb50-0x000fcb5f] mapped at [ffff9863400fcb50] Aug 23 22:54:30 Plexerver kernel: [ 0.000000] Using ACPI (MADT) for SMP configuration information Aug 23 22:54:30 Plexerver kernel: [ 0.000000] smpboot: Allowing 2 CPUs, 0 hotplug CPUs Aug 23 22:54:30 Plexerver kernel: [ 0.034288] Freeing SMP alternatives memory: 32K Aug 23 22:54:30 Plexerver kernel: [ 0.053161] smpboot: Max logical packages: 1 Aug 23 22:54:30 Plexerver kernel: [ 0.098459] smpboot: CPU0: Intel(R) Core(TM) i5-7600T CPU @ 2.80GHz (family: 0x6, model: 0x9e, stepping: 0x9) Aug 23 22:54:30 Plexerver kernel: [ 0.099158] smp: Bringing up secondary CPUs . Aug 23 22:54:30 Plexerver kernel: [ 0.099206] x86: Booting SMP configuration: Aug 23 22:54:30 Plexerver kernel: [ 0.100679] smp: Brought up 1 node, 2 CPUs Aug 23 22:54:30 Plexerver kernel: [ 0.100680] smpboot: Total of 2 processors activated (11232.00 BogoMIPS) Aug 23 22:54:30 Plexerver irqbalance[1973]: * Starting SMP IRQ Balancer: irqbalance Aug 23 22:54:30 Plexerver systemd[1]: Started LSB: daemon to balance interrupts for SMP systems. # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD . ) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1"