Quantcast
Channel: Raspberry Pi Forums
Viewing all articles
Browse latest Browse all 4785

Troubleshooting • Re: Pi5 8GB memory bandwidth significantly lower than Pi5 4GB

$
0
0

When increasing the number of active cores, does the N100 miniPC show a similar drop in aggregate memory bandwidth?
I'm afraid the N100 has been loaded with Windows and is no longer available with Linux.
Oh well. Since the N100 has only one channel of DDR5 memory, I wondered what would happen.
The exalted one has allowed me to steal 32GB from her SSD to install Ubuntu, under penalty of starving to death should I mess up her computer. Here are the results

Code:

--- 1 thread -------------------------------------------------Function    Best Rate MB/s  Avg time     Min time     Max timeCopy:           22243.6     0.007254     0.007193     0.007329Scale:          16341.7     0.009840     0.009791     0.009901Add:            19026.5     0.012653     0.012614     0.012739Triad:          18978.4     0.012714     0.012646     0.012804--- 2 threads ------------------------------------------------Function    Best Rate MB/s  Avg time     Min time     Max timeCopy:           30881.6     0.005213     0.005181     0.005281Scale:          20468.1     0.007880     0.007817     0.007957Add:            22272.1     0.010832     0.010776     0.010932Triad:          22220.0     0.010879     0.010801     0.010939--- 3 threads ------------------------------------------------Function    Best Rate MB/s  Avg time     Min time     Max timeCopy:           31865.6     0.005116     0.005021     0.005258Scale:          19730.9     0.008159     0.008109     0.008300Add:            20366.5     0.011876     0.011784     0.011918Triad:          20357.8     0.011911     0.011789     0.012506--- 4 threads ------------------------------------------------Function    Best Rate MB/s  Avg time     Min time     Max timeCopy:           29794.4     0.005412     0.005370     0.005489Scale:          18874.7     0.008529     0.008477     0.008587Add:            20107.3     0.012011     0.011936     0.012207Triad:          20156.4     0.012007     0.011907     0.012408--------------------------------------------------------------

Statistics: Posted by lurk101 — Mon Apr 29, 2024 12:45 am



Viewing all articles
Browse latest Browse all 4785

Trending Articles