No offense, but for all of you doing crazy unstable overclocks, your Pi3 is functioning worse off than a stock Pi3 at 1.2 GHz does. If an overclocked ARM/CPU cannot perform calculations without errors, then its ability to function as a "central processor" is fundamentally defective and flawed.jloh wrote:I've successfully overclocked my pi 3 to 1450. Well, to be honest I've been running it this way for months.
I used cpuburn for close to an hour (47 mins). My CPU temp net from 46.7 to 82.7 C (close enough to 85. I've heard it will throttle down on it's own, but...). top said my cpus were above 99% the whole time (ok, I lied. when I was watching, which was basically 10% of the time). memtest ran fine.
Code: Select all
sudo apt-get install libmpich-dev
wget http://web.eece.maine.edu/~vweaver/junk/pi3_hpl.tar.gz
tar -xvzf pi3_hpl.tar.gz
chmod +x xhpl
./xhpl
Code: Select all
[email protected]:~ $ ./xhpl
================================================================================
HPLinpack 2.1 -- High-Performance Linpack benchmark -- October 26, 2012
Written by A. Petitet and R. Clint Whaley, Innovative Computing Laboratory, UTK
Modified by Piotr Luszczek, Innovative Computing Laboratory, UTK
Modified by Julien Langou, University of Colorado Denver
================================================================================
An explanation of the input/output parameters follows:
T/V : Wall time / encoded variant.
N : The order of the coefficient matrix A.
NB : The partitioning blocking factor.
P : The number of process rows.
Q : The number of process columns.
Time : Time in seconds to solve the linear system.
Gflops : Rate of execution for solving the linear system.
The following parameter values will be used:
N : 8000
NB : 256
PMAP : Row-major process mapping
P : 1
Q : 1
PFACT : Left
NBMIN : 2
NDIV : 2
RFACT : Right
BCAST : 2ring
DEPTH : 0
SWAP : Mix (threshold = 64)
L1 : transposed form
U : transposed form
EQUIL : yes
ALIGN : 8 double precision words
--------------------------------------------------------------------------------
- The matrix A is randomly generated for each test.
- The following scaled residual check will be computed:
||Ax-b||_oo / ( eps * ( || x ||_oo * || A ||_oo + || b ||_oo ) * N )
- The relative machine precision (eps) is taken to be 1.110223e-16
- Computational tests pass if scaled residuals are less than 16.0
================================================================================
T/V N NB P Q Time Gflops
--------------------------------------------------------------------------------
WR02R2L2 8000 256 1 1 51.27 6.660e+00
HPL_pdgesv() start time Sun Apr 24 09:13:21 2016
HPL_pdgesv() end time Sun Apr 24 09:14:12 2016
--------------------------------------------------------------------------------
||Ax-b||_oo/(eps*(||A||_oo*||x||_oo+||b||_oo)*N)= 0.0025941 ...... PASSED
================================================================================
Finished 1 tests with the following results:
1 tests completed and passed residual checks,
0 tests completed and failed residual checks,
0 tests skipped because of illegal input values.
--------------------------------------------------------------------------------
End of Tests.
================================================================================
[email protected]:~ $ ./xhpl
================================================================================
HPLinpack 2.1 -- High-Performance Linpack benchmark -- October 26, 2012
Written by A. Petitet and R. Clint Whaley, Innovative Computing Laboratory, UTK
Modified by Piotr Luszczek, Innovative Computing Laboratory, UTK
Modified by Julien Langou, University of Colorado Denver
================================================================================
An explanation of the input/output parameters follows:
T/V : Wall time / encoded variant.
N : The order of the coefficient matrix A.
NB : The partitioning blocking factor.
P : The number of process rows.
Q : The number of process columns.
Time : Time in seconds to solve the linear system.
Gflops : Rate of execution for solving the linear system.
The following parameter values will be used:
N : 8000
NB : 256
PMAP : Row-major process mapping
P : 1
Q : 1
PFACT : Left
NBMIN : 2
NDIV : 2
RFACT : Right
BCAST : 2ring
DEPTH : 0
SWAP : Mix (threshold = 64)
L1 : transposed form
U : transposed form
EQUIL : yes
ALIGN : 8 double precision words
--------------------------------------------------------------------------------
- The matrix A is randomly generated for each test.
- The following scaled residual check will be computed:
||Ax-b||_oo / ( eps * ( || x ||_oo * || A ||_oo + || b ||_oo ) * N )
- The relative machine precision (eps) is taken to be 1.110223e-16
- Computational tests pass if scaled residuals are less than 16.0
================================================================================
T/V N NB P Q Time Gflops
--------------------------------------------------------------------------------
WR02R2L2 8000 256 1 1 51.47 6.634e+00
HPL_pdgesv() start time Sun Apr 24 09:14:53 2016
HPL_pdgesv() end time Sun Apr 24 09:15:44 2016
--------------------------------------------------------------------------------
||Ax-b||_oo/(eps*(||A||_oo*||x||_oo+||b||_oo)*N)= 0.0025941 ...... PASSED
================================================================================
Finished 1 tests with the following results:
1 tests completed and passed residual checks,
0 tests completed and failed residual checks,
0 tests skipped because of illegal input values.
--------------------------------------------------------------------------------
End of Tests.
================================================================================
[email protected]:~ $ ./xhpl
================================================================================
HPLinpack 2.1 -- High-Performance Linpack benchmark -- October 26, 2012
Written by A. Petitet and R. Clint Whaley, Innovative Computing Laboratory, UTK
Modified by Piotr Luszczek, Innovative Computing Laboratory, UTK
Modified by Julien Langou, University of Colorado Denver
================================================================================
An explanation of the input/output parameters follows:
T/V : Wall time / encoded variant.
N : The order of the coefficient matrix A.
NB : The partitioning blocking factor.
P : The number of process rows.
Q : The number of process columns.
Time : Time in seconds to solve the linear system.
Gflops : Rate of execution for solving the linear system.
The following parameter values will be used:
N : 8000
NB : 256
PMAP : Row-major process mapping
P : 1
Q : 1
PFACT : Left
NBMIN : 2
NDIV : 2
RFACT : Right
BCAST : 2ring
DEPTH : 0
SWAP : Mix (threshold = 64)
L1 : transposed form
U : transposed form
EQUIL : yes
ALIGN : 8 double precision words
--------------------------------------------------------------------------------
- The matrix A is randomly generated for each test.
- The following scaled residual check will be computed:
||Ax-b||_oo / ( eps * ( || x ||_oo * || A ||_oo + || b ||_oo ) * N )
- The relative machine precision (eps) is taken to be 1.110223e-16
- Computational tests pass if scaled residuals are less than 16.0
================================================================================
T/V N NB P Q Time Gflops
--------------------------------------------------------------------------------
WR02R2L2 8000 256 1 1 51.69 6.605e+00
HPL_pdgesv() start time Sun Apr 24 09:16:14 2016
HPL_pdgesv() end time Sun Apr 24 09:17:06 2016
--------------------------------------------------------------------------------
||Ax-b||_oo/(eps*(||A||_oo*||x||_oo+||b||_oo)*N)= 0.0025941 ...... PASSED
================================================================================
Finished 1 tests with the following results:
1 tests completed and passed residual checks,
0 tests completed and failed residual checks,
0 tests skipped because of illegal input values.
--------------------------------------------------------------------------------
End of Tests.
Code: Select all
[email protected]:~ $ while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& ./cpuburn-a53
[1] 1244
frequency(45)=1260132000
temp=27.9'C
frequency(45)=1260002000
temp=41.9'C
frequency(45)=1260000000
temp=42.9'C
frequency(45)=1260002000
temp=45.1'C
frequency(45)=1260000000
temp=46.2'C
frequency(45)=1260000000
temp=46.2'C
frequency(45)=1260000000
temp=46.2'C
frequency(45)=1260000000
temp=46.7'C
frequency(45)=1260000000
temp=46.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260002000
temp=47.8'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1259998000
temp=47.2'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260002000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1259998000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260002000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1259998000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1259998000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260002000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260002000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1259998000
temp=48.9'C
frequency(45)=1260002000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1259998000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1259998000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260002000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260002000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260002000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260002000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260002000
temp=49.9'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260002000
temp=50.5'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1259998000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1259998000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.2'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260002000
temp=47.2'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=47.8'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260002000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260002000
temp=49.4'C
frequency(45)=1260002000
temp=49.4'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1259998000
temp=49.4'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=48.3'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260002000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260002000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1259998000
temp=49.9'C
frequency(45)=1259998000
temp=49.9'C
frequency(45)=1260002000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260002000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=50.5'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=48.9'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.4'C
frequency(45)=1260000000
temp=49.9'C
frequency(45)=1260000000
temp=49.9'C
Code: Select all
top - 14:30:28 up 1:02, 1 user, load average: 4.24, 4.29, 4.55
Tasks: 144 total, 5 running, 139 sleeping, 0 stopped, 0 zombie
%Cpu0 :100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu1 :100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu2 :100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu3 : 99.7 us, 0.3 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem: 753132 total, 726316 used, 26816 free, 34308 buffers
KiB Swap: 102396 total, 16 used, 102380 free. 471188 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1245 pi 20 0 1680 344 288 R 100.0 0.0 45:38.14 cpuburn-a53
1248 pi 20 0 1680 84 16 R 100.0 0.0 45:38.37 cpuburn-a53
1249 pi 20 0 1680 88 16 R 99.7 0.0 45:31.79 cpuburn-a53
1247 pi 20 0 1680 84 16 R 98.3 0.0 45:36.51 cpuburn-a53
656 root 20 0 120416 43644 19604 S 0.7 5.8 1:33.24 Xorg
1232 pi 20 0 47120 19148 16304 S 0.7 2.5 0:10.32 lxterminal
1679 pi 20 0 5112 2456 2088 R 0.7 0.3 0:08.64 top
1 root 20 0 23904 4040 2788 S 0.0 0.5 0:06.70 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.16 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:+
7 root 20 0 0 0 0 S 0.0 0.0 0:01.19 rcu_sched
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root rt 0 0 0 0 S 0.0 0.0 0:00.01 migration/0
Yes, that was assumed. Did you run the bench posted above to check overclock stability?jloh wrote:Oh I forgot to post that I also have a heatsink, on my SOC.
Code: Select all
dtoverlay=sdhost,overclock_50=100
dtparam=sd_overclock=100
Code: Select all
fulload() { dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null & }; fulload
Code: Select all
arm_freq=1350
core_freq=575
over_voltage=4
sdram_freq=575
sdram_schmoo=0x02000020
over_voltage_sdram_p=6
over_voltage_sdram_i=4
over_voltage_sdram_c=4
v3d_freq=500
h264_freq=333
gpu_mem=256
joshbgosh10592 wrote:All,
I'm running the following in my config.txt, and it boots successfully. I can't get cpuburn to run for some reason, but I'm running thisto try to kick my CPU to max. However, it haults at 32.9% while the CPU is throttling itself due to temp (81.7' C)Code: Select all
fulload() { dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null & }; fulload
Is this normal?
Even with a Vornado (super strong fan) pointed on it, the temp drops to 62.3' , but the CPU% stays the same.
Also, does the order of the listings in the config.txt matter?
Code: Select all
arm_freq=1350 core_freq=575 over_voltage=4 sdram_freq=575 sdram_schmoo=0x02000020 over_voltage_sdram_p=6 over_voltage_sdram_i=4 over_voltage_sdram_c=4 v3d_freq=500 h264_freq=333 gpu_mem=256
Overclocking Pi3 is worth, I have a 90% playable Retro-gamestation thanks to overclock. You can increase read/write speeds on microSD from 19MB/sec to 40MB/sec, also you can improve some speed while accesing memory ram or reducing CPU time. It is worth, but you don't need to use ice on it.Professor wrote:My Pi 3 doesn't arrive yet however I can tell that heavily overclocked SoC tends to perform slower than normal one. I know what I'm talking about: I used to kick my Pi 1 up to 1.4 GHz, yea, it was stable. But it was really slow on some heavy duty due to calculation errors meant above.
I don't see actual point to overclock Pi 3 since this overclocking won't give you any significant nor even slightly notable differences. There is a point to overclock Pi 1, a very tiny point to overclock Pi 2... and absolutely none to overclock third. Just my opinion though.
A little tip for extreme overclockers (I really did so, but it was just for lulz): put an ice cube into plastic film from cigarettes pack, solder it with the lighter, and put on pi's SoC. Now you can act really rough with it for some minutes, but don't water the board!
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# cpu - gpu overclock
arm_freq=1400
over_voltage=6
gpu_freq=550
v3d_freq=525
disable_splash=1
# sdram overclock
sdram_freq=500
sdram_schmoo=0x02000020
over_voltage_sdram_p=6
over_voltage_sdram_i=4
over_voltage_sdram_c=4
Look into this:buggie wrote:Hi Guys, how to get more voltage than over_voltage=6 ? (1.394V)
Great note.. thanks.rpdom wrote:If you haven't changed them from the default by setting any values in config.txt, you can check the values withKiloPIE wrote:Does anybody know the default values for the settings?
vcgencmd get_config int
and that will show what they are set to.
Wow. That's a pretty high overclock. I have this running now with a small heatsink from a really old desktop (around 1990)Linuxtech wrote: ↑Tue Oct 10, 2017 3:49 amHello,
I managed to get my pi to these settings:
#Overclock setting 2
arm_freq=1700
over_voltage=5
gpu_freq=625
# sdram overclock
sdram_freq=625
sdram_schmoo=0x02000020
over_voltage_sdram_p=6
over_voltage_sdram_i=4
over_voltage_sdram_c=4
I currently have a power supply heat sink and laptop fan secured to the CPU. However, I dont hit above 45C, it currently wont let me go any higher without changing the over voltages and voiding the warranty. This is the most heat efficient way to use the governor and dynamic restrictions.