#5365 bMips display/calculation wrong?

[Michael Byczkowski]

Webmin 1.942.0313.1749 reports my Raspberry Pi4 with Processor information: ARMv7 Processor rev 3 (v7l) @ 108 bMips, 4 cores
My understanding is that each core has 108 bMips, see for example cat /proc/cpuinfo:
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 1
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 2
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 3
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

Hardware : BCM2835
Revision : c03111
Serial : 10000000f7c7a5e0
Model : Raspberry Pi 4 Model B Rev 1.1

[Jamie Cameron]

Can you attach a screenshot of where you're seeing this in Webmin?

[Michael Byczkowski]

Sure, see the attached file, it's in the right column.

[Jamie Cameron]

For bogomips and Mhz, webmin shows the per-core number ... it doesnt add them up.

[Michael Byczkowski]

Sure, but shouldn't it read then
ARMv7 Processor rev 3 (v7l), 4 cores @ 108 bMips each
instead of
ARMv7 Processor rev 3 (v7l) @ 108 bMips, 4 cores
as it does currently?

[Jamie Cameron]

I'd prefer it be consistent with the way CPUs with a Mhz number are shown, which is like Intel(R) Xeon(R) CPU E5-2430 v2 @ 2.50GHz, 12 cores

[Michael Byczkowski]

Understood Jamie; the CPU frequency is available at cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
Alternativley, why not simpyl multiply bMips with cores and disply the result; here, that'd be "ARMv7 Processor rev 3 (v7l) @ 432 bMips, 4 cores"

[Jamie Cameron]

It wouldn't make sense to multiple the CPU Mhz like this, so I don't think it makes sense for bogomips anyway. It's a rough measure of single-threaded CPU speed, not total computing power.

[Michael Byczkowski]

Just to add: MHz value is 0 on Raspberry Pi 4B:
CPU type: Raspberry Pi 4 Model B Rev 1.1 (0 MHz) , 4 cores
(on https://server:10000/proc/index_cpu.cgi?xnavigation=1)

[Ilia]

Just to add: MHz value is 0 on Raspberry Pi 4B: CPU type: Raspberry Pi 4 Model B Rev 1.1 (0 MHz) , 4 cores

Hmm, what is the output of on that system:

cat /proc/cpuinfo

[Michael Byczkowski]

processor : 0
BogoMIPS : 108.00
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 1
BogoMIPS : 108.00
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 2
BogoMIPS : 108.00
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 3
BogoMIPS : 108.00
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

Hardware : BCM2835
Revision : c03111
Serial : 10000000f7c7a5e0
Model : Raspberry Pi 4 Model B Rev 1.1

On 24. Nov 2020, at 13:49, Ilia Rostovtsev rostovtsev@users.sourceforge.net wrote:

Just to add: MHz value is 0 on Raspberry Pi 4B: CPU type: Raspberry Pi 4 Model B Rev 1.1 (0 MHz) , 4 cores

Hmm, what is the output of on that system:

cat /proc/cpuinfo
[bugs:#5365] https://sourceforge.net/p/webadmin/bugs/5365/ bMips display/calculation wrong?

Status: open
Group: 1.940
Created: Sat Mar 21, 2020 11:14 AM UTC by Michael Byczkowski
Last Updated: Tue Nov 24, 2020 12:34 PM UTC
Owner: nobody

Webmin 1.942.0313.1749 reports my Raspberry Pi4 with Processor information: ARMv7 Processor rev 3 (v7l) @ 108 bMips, 4 cores
My understanding is that each core has 108 bMips, see for example cat /proc/cpuinfo:
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 1
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 2
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 3
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

Hardware : BCM2835
Revision : c03111
Serial : 10000000f7c7a5e0
Model : Raspberry Pi 4 Model B Rev 1.1

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