| 21:46 | topi` | jnettlet: the CPU with a heatsink at 70C? |
| 21:47 | topi` | is this at 20C ambient? |
| 21:47 | topi` | in Finland we don't have many issues with high ambient temps :) maybe in the summer, but the heat pump does magic |
| 21:49 | topi` | I wonder how good the memory bw/latency is between cores, in chinese products like the Rockchip octa-core part it's generally very shitty |
| 21:52 | topi` | case in point: rk3368 geekbench single versus multi core, those integer scores are nowhere near 800% scaling: |
| 21:52 | topi` | http://browser.primatelabs.com/geekbench3/7577325 |
| 21:53 | topi` | this is partially explained by the fact that the "big" cluster in rk3368 is usually running at 1.5ghz and the "little" at 1.2 ghz, but not totally |
| 21:53 | topi` | bzip2 compress is less than 400% speedup, using a 900k compress window clearly creates a lot of bus traffic |
| 21:54 | suihkulokki | mobile socs usually have slow low power ram |
| 21:55 | suihkulokki | hence anything mem bound is slow |
| 21:55 | topi` | I guess that's true, but I'd also put some blame on the bus inside SoC |
| 21:55 | topi` | what Intel does with 4 and 8c Core chips is a ring bus between cores |
| 21:56 | topi` | well, a crossbar would probably be even faster, but... |
| 21:56 | topi` | the ARMADA 8040 is not supposed to be a mobile SoC, so let's see how well it handles it :) |
| 21:56 | topi` | I'm also curious if they are going to make a 8 core version eventually. Maybe a drop-in replacement for a new iteration of the 8040 board? :) |
| 21:57 | suihkulokki | well lets get hand on first gen first :) |
| 21:57 | topi` | :) |
| 21:58 | topi` | I could not find anything on Geekbench database with marvell, armada, nor 8040 |
| 21:58 | topi` | well, nevermind geekbench, I can just compare pbzip2 on different platforms :) |
| 21:59 | topi` | it absolutely flies on my brand new Macbook Pro, but that's a Skylake with huge L2 caches etc etc |
| 22:00 | suihkulokki | pixz better.. |
| 22:00 | topi` | not all (older) systems can decompress xz |
| 22:00 | topi` | bzip2 is more backwards-friendly :) |
| 22:00 | topi` | although decompressing bzip2 is a tad slow |
| 22:00 | suihkulokki | for slow/compat use gzip |
| 22:01 | topi` | I should finish up my work in creating Ubuntu Snappy Core image for Hummingboard... |
| 22:02 | topi` | I already did most of the red tape, but got stuck in creating the Kernel snap |
| 22:02 | suihkulokki | there was a relatively conclusive benchmark that bzip2 doesn't have room between gzip -9 and xz -1 |