Suggestion: differentiate between big and little cores #879

rbanffy · 2021-11-24T10:31:03Z

Various ARM platforms have been doing it with big.LITTLE and DinamiQ for some time, with different cores, and Apple's M1 and Intel's Alder Lake made it into the mainstream now. It'd be useful to see which CPUs are of which kind, perhaps showing them with their numbers in bold if they are "Performance" cores and normal if they are "Efficient" ones.

fasterit · 2021-11-24T11:45:45Z

Totally. Can we have some cat /proc/cpuinfo from such systems please? (Just attach to this issue)

BenBE · 2021-11-24T15:19:52Z

Should be a change in our internal CPU structure so this can be supported on all OS.
Information to query these information on other OS than Linux are appreciated.

rbanffy · 2021-11-24T23:15:02Z

It should be fine not to show it on OSs that don't make it ridiculously easy to get the information. There are also parts that have more than two types of core (Mediatek's newest SoC has 3). I'll dig into a couple of those and check what I can find.

…

On Wed, Nov 24, 2021 at 3:20 PM BenBE ***@***.***> wrote: Should be a change in our internal CPU structure so this can be supported on all OS. Information to query these information on other OS than Linux are appreciated. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#879 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABNDCSXDDKCE372VJGTVMTUNT7CHANCNFSM5IVWI46Q> .

-- Ricardo Bánffy http://about.me/rbanffy

BenBE · 2021-11-25T08:11:29Z

In this case even writing the core type names may be an option if no/little processing is needed to get to those identifiers …

eworm-de · 2022-05-25T07:18:16Z

Perhaps it would also make sense to add information about hyper-threading here, so where a core is the "primary" one or a hyper-threaded one. Should be possible to get the required information by grouping by core id from /proc/cpuinfo.

rbanffy · 2022-05-25T17:51:24Z

Perhaps it would also make sense to add information about hyper-threading here, so where a core is the "primary" one or a hyper-threaded one. Should be possible to get the required information by grouping by core id from /proc/cpuinfo.

Not sure there is a difference between a primary and an SMT core when SMT is enabled - they just behaves as another core that shares the same resources (and have more resources available as you turn off secondary threads - x86's (original Xeon Phi excepted) have 2 threads, but POWER and SPARC can have up to 8 threads per core). One way to present it would be to group SMT cores (maybe with line drawing characters such as ┌, ├, and └) that belong to a single core to indicate with how many SMT cores the physical core is being shared with (but that would create some complications with screen layouts).

eworm-de · 2022-05-25T21:38:15Z

Of course there is no priority between hyper-threaded cores, both (or all) work the same. I just would like to see what cores belong to each other when it comes to hyper-threading.

eworm-de · 2022-08-18T12:08:33Z

This is what /proc/cpuinfo looks like on a 12th Gen Intel(R) Core(TM) i7-1260P:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 1610.656
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 0
cpu cores	: 12
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
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		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 0
cpu cores	: 12
apicid		: 1
initial apicid	: 1
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 1140.767
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 4
cpu cores	: 12
apicid		: 8
initial apicid	: 8
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 4
cpu cores	: 12
apicid		: 9
initial apicid	: 9
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 4
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 1498.817
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 8
cpu cores	: 12
apicid		: 16
initial apicid	: 16
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 5
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 8
cpu cores	: 12
apicid		: 17
initial apicid	: 17
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 6
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 1210.886
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 12
cpu cores	: 12
apicid		: 24
initial apicid	: 24
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 12
cpu cores	: 12
apicid		: 25
initial apicid	: 25
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 8
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 1106.199
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 16
cpu cores	: 12
apicid		: 32
initial apicid	: 32
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 9
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 17
cpu cores	: 12
apicid		: 34
initial apicid	: 34
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 10
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 18
cpu cores	: 12
apicid		: 36
initial apicid	: 36
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 11
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 19
cpu cores	: 12
apicid		: 38
initial apicid	: 38
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 12
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 20
cpu cores	: 12
apicid		: 40
initial apicid	: 40
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 13
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 21
cpu cores	: 12
apicid		: 42
initial apicid	: 42
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 14
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 22
cpu cores	: 12
apicid		: 44
initial apicid	: 44
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 15
vendor_id	: GenuineIntel
cpu family	: 6
model		: 154
model name	: 12th Gen Intel(R) Core(TM) i7-1260P
stepping	: 3
microcode	: 0x421
cpu MHz		: 2500.000
cache size	: 18432 KB
physical id	: 0
siblings	: 16
core id		: 23
cpu cores	: 12
apicid		: 46
initial apicid	: 46
fpu		: yes
fpu_exception	: yes
cpuid level	: 32
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 cpuid 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 cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req hfi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize arch_lbr flush_l1d arch_capabilities
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs ept_mode_based_exec tsc_scaling usr_wait_pause
bugs		: spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips	: 4993.00
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

Nothing to distinguish between P and E cores, no?

However looking at output of lscpu you can see what cores are hyperthreaded at least.

# lscpu --all --extended          
CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE    MAXMHZ   MINMHZ       MHZ
  0    0      0    0 0:0:0:0          yes 4700,0000 400,0000 1696,3810
  1    0      0    0 0:0:0:0          yes 4700,0000 400,0000 1190,4110
  2    0      0    1 4:4:1:0          yes 4700,0000 400,0000  580,6140
  3    0      0    1 4:4:1:0          yes 4700,0000 400,0000 1661,8030
  4    0      0    2 8:8:2:0          yes 4700,0000 400,0000 1615,3199
  5    0      0    2 8:8:2:0          yes 4700,0000 400,0000 2500,0000
  6    0      0    3 12:12:3:0        yes 4700,0000 400,0000 1651,8090
  7    0      0    3 12:12:3:0        yes 4700,0000 400,0000 2500,0000
  8    0      0    4 16:16:4:0        yes 3400,0000 400,0000 1247,2000
  9    0      0    5 17:17:4:0        yes 3400,0000 400,0000  773,7930
 10    0      0    6 18:18:4:0        yes 3400,0000 400,0000 1471,3719
 11    0      0    7 19:19:4:0        yes 3400,0000 400,0000 2500,0000
 12    0      0    8 20:20:5:0        yes 3400,0000 400,0000 2500,0000
 13    0      0    9 21:21:5:0        yes 3400,0000 400,0000 1525,6860
 14    0      0   10 22:22:5:0        yes 3400,0000 400,0000 2500,0000
 15    0      0   11 23:23:5:0        yes 3400,0000 400,0000 2500,0000

rbanffy · 2022-08-18T15:51:32Z

Nice! And we can see the P and E cores from the MAXMHZ column in lscpu (which seems reasonable)

eworm-de · 2022-08-18T17:18:57Z

Yes, the frequency is different, but I am not sure this is something one can rely on. Chances are that different core types have the same max frequency.

medakk · 2022-10-09T19:53:39Z

I was looking into the same problem. The kernel exposes a highest_perf number:

$ head -n +1 /sys/devices/system/cpu/cpu*/acpi_cppc/highest_perf
==> /sys/devices/system/cpu/cpu0/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu1/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu2/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu3/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu4/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu5/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu6/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu7/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu8/acpi_cppc/highest_perf <==
63

==> /sys/devices/system/cpu/cpu9/acpi_cppc/highest_perf <==
63

==> /sys/devices/system/cpu/cpu10/acpi_cppc/highest_perf <==
63

==> /sys/devices/system/cpu/cpu11/acpi_cppc/highest_perf <==
63

==> /sys/devices/system/cpu/cpu12/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu13/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu14/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu15/acpi_cppc/highest_perf <==
61

==> /sys/devices/system/cpu/cpu16/acpi_cppc/highest_perf <==
36

==> /sys/devices/system/cpu/cpu17/acpi_cppc/highest_perf <==
36

==> /sys/devices/system/cpu/cpu18/acpi_cppc/highest_perf <==
36

==> /sys/devices/system/cpu/cpu19/acpi_cppc/highest_perf <==
36

The only documentation I see on this says:

highest_perf : Highest performance of this processor (abstract scale).

Unsure if this is reliable enough to use to group processors into big/little

EDIT: my bad, there's a spec on this. Looking for the interpretation of these numbers here...

rbanffy · 2022-10-11T16:17:45Z

Sounds like a plausible plan. Wondering how it could be represented visually.

…

On Sun, Oct 9, 2022 at 8:53 PM Karthik Karanth ***@***.***> wrote: I was looking into the same problem. The kernel exposes a highest_perf number: $ head -n +1 /sys/devices/system/cpu/cpu*/acpi_cppc/highest_perf ==> /sys/devices/system/cpu/cpu0/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu1/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu2/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu3/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu4/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu5/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu6/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu7/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu8/acpi_cppc/highest_perf <== 63 ==> /sys/devices/system/cpu/cpu9/acpi_cppc/highest_perf <== 63 ==> /sys/devices/system/cpu/cpu10/acpi_cppc/highest_perf <== 63 ==> /sys/devices/system/cpu/cpu11/acpi_cppc/highest_perf <== 63 ==> /sys/devices/system/cpu/cpu12/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu13/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu14/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu15/acpi_cppc/highest_perf <== 61 ==> /sys/devices/system/cpu/cpu16/acpi_cppc/highest_perf <== 36 ==> /sys/devices/system/cpu/cpu17/acpi_cppc/highest_perf <== 36 ==> /sys/devices/system/cpu/cpu18/acpi_cppc/highest_perf <== 36 ==> /sys/devices/system/cpu/cpu19/acpi_cppc/highest_perf <== 36 The only documentation I see on this <https://www.kernel.org/doc/html/v5.2/admin-guide/acpi/cppc_sysfs.html> says: highest_perf : Highest performance of this processor (abstract scale). Unsure if this is reliable enough to use to group processors — Reply to this email directly, view it on GitHub <#879 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABNDCVGB65XFXLDPFNYBADWCMPE3ANCNFSM5IVWI46Q> . You are receiving this because you authored the thread.Message ID: ***@***.***>

-- Ricardo Bánffy http://about.me/rbanffy

BenBE · 2022-10-12T07:21:26Z

What about marking the small cores with shadow'd numbers?

The alternative of marking the big cores in bold is suboptimal as it causes a visual change even for users with hardware that doesn't distinguish those cores.

Kenterfie · 2022-11-24T10:54:14Z

The difference between E and P cores is only one type of grouping cores together. What do you think about a general grouping of cores in htop to visualize differences. For example HT (which core relates to another physical core), NUMA groups, P/E cores and i guess more different groups are coming and then only a shadow'd number is not enough anymore.

eworm-de · 2023-04-14T13:49:36Z

Mesa introduced support for detecting this:
https://gitlab.freedesktop.org/mesa/mesa/-/commit/0cc93a460319294d085a5642b55050fadf39100e

Can we reuse any of this?

eworm-de · 2023-04-14T21:29:51Z

This tries to read from /sys/devices/system/cpu/cpu%u/cpu_capacity to get a calculated capacity. While this exists on a Respberry Pi I do not see the files on x86_64. Looks like the usefulness is limited.

igormp · 2023-05-08T03:22:18Z

Wouldn't it be better to have a new kind of CPU meter with such grouping enabled? Maybe something akin to lstopo and vertical bars.

eworm-de · 2023-05-09T07:09:40Z

The more important part for now is how to get the required information from system...

igormp · 2023-05-09T15:15:25Z

The more important part for now is how to get the required information from system...

Maybe we could get this done for ARM first, for which your last reply does work (checking the cpu_capacity), and then adding x86 support later on?

eworm-de · 2023-05-09T15:29:30Z

Not sure... Still wondering if there is a generic solution that works for all architectures.

BenBE · 2023-05-09T15:43:00Z

Main issue for this is still that htop currently does not track CPU topology at all. This would be the first step to properly resolve this. Also we are not only talking Linux here, but also Darwin and *BSD for which these information need to be gathered.

Closes htop-dev#806. Closes htop-dev#1048. Closes htop-dev#1176. Closes htop-dev#1335. Addresses htop-dev#879 (on Linux).

eworm-de · 2024-02-29T14:26:17Z

Oh, there is intel-lpmd, the Intel Low Power Mode Daemon. Perhaps we can steal some code and/or ideas there?

eworm-de · 2024-08-27T08:17:10Z

Just found libcpuid, which reports purpose of performance and efficiency on my Alder Lake system. That could be a candidate to link against for all the information we need, preferably via dlopen to make it optional.

fasterit · 2024-08-27T08:31:40Z

Another tool worth looking at is lstopo from hwloc.

Closes htop-dev#806. Closes htop-dev#1048. Closes htop-dev#1176. Closes htop-dev#1335. Addresses htop-dev#879 (on Linux).

BenBE added enhancement Extension or improvement to existing feature good first issue 🥇 Good for newcomers question ❔ Further information is requested labels Nov 24, 2021

eworm-de mentioned this issue Apr 14, 2023

Differentiate between P-Core E-Cores on Intel Alder Lake #1094

Open

leahneukirchen mentioned this issue Nov 24, 2023

Temperature mapping is wrong on i7-1355U #1335

Open

leahneukirchen added a commit to leahneukirchen/htop that referenced this issue Dec 25, 2023

linux: assign CPU temperatures by package/core or CCD

f61c2d0

Closes htop-dev#806. Closes htop-dev#1048. Closes htop-dev#1176. Closes htop-dev#1335. Addresses htop-dev#879 (on Linux).

leahneukirchen mentioned this issue Dec 25, 2023

linux: assign CPU temperatures by package/core or CCD #1352

Open

leahneukirchen added a commit to leahneukirchen/htop that referenced this issue Dec 25, 2023

linux: assign CPU temperatures by package/core or CCD

d4cb5d1

Closes htop-dev#806. Closes htop-dev#1048. Closes htop-dev#1176. Closes htop-dev#1335. Addresses htop-dev#879 (on Linux).

BenBE mentioned this issue Dec 26, 2023

[FEATURE] P & E-Core differentiation for big.LITTLE CPUs #1347

Open

leahneukirchen added a commit to leahneukirchen/htop that referenced this issue Sep 1, 2024

linux: assign CPU temperatures by package/core or CCD

a0f8646

Closes htop-dev#806. Closes htop-dev#1048. Closes htop-dev#1176. Closes htop-dev#1335. Addresses htop-dev#879 (on Linux).

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fasterit commented Aug 27, 2024

Suggestion: differentiate between big and little cores #879

Suggestion: differentiate between big and little cores #879

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rbanffy commented Nov 24, 2021 •

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