Duo core Atom Netbooks does anyone run Logos on one of these 10 inch netbooks, if so does it run it fast enough?
In Christ,
Jim VanSchoonhoven
Or, any Novabench results?
Jim,
I run L4 on a Samsung NC110 on a single core CPU 1.6-GHz Intel Atom N270, with 2gb ram.
I do get sporadic freezes if I have over 5 tabs open, but on the whole performance is acceptable, it is fine for 90% of time, so I would imagine the dual core would rock, but think it would be better if ram could get to 4gb which is unlikely.
I have an 11.6" netbook: MSI U230 L-087 with a single-core AMD Athlon Neo MV-40, 1.6gh, 4gb RAM.
Does Logos 4 run? Yes, and better than I expected. But it is S-L-O-W. I would hate to count on it as my primary work (study) computer. It's a great little "carry-around" machine, but doesn't have the horsepower or video subsystem to perform L4 searches. Logos relies heavily on a computer's video system and netbooks tend to be light on video RAM. The small screen is also a liability, though that may be the fault of my fifty-something eyes. Maybe the Atom dual-core will do better.
BTW, bumping the RAM to 4gb in the netbook made a noticeable difference.
Has anyone done any measurements to see how many cores / sockets L4 will use during normal operation? I'm curious based on what I've seen during indexing on 2 different computers (admittedly *not* "normal operation").
On a dual core Core i7 laptop, indexing will take the CPU to around 90% (using the somewhat crude output of Task Manager). Note that the laptop is plugged in and in max-performance mode. However, the same indexing operation (same new resource download) only gets the CPU to about 10% on a quad core Core i7 desktop workstation. Interestingly, the indexing takes about the same amount of wall-clock time on each (workstation just a little faster). I know a mobile Core i7 isn't quite what a desktop Core i7 is, but I believe the CPU speeds are about the same.
It would seem that at some point in the performance characteristics of a computer, indexing goes from being CPU-bound (90% CPU on the laptop) to being I/O bound (10% CPU on the desktop). The relatively slower I/O of a laptop's disk subsystem makes this even more curious.
My point is that simply because a computer has multiple cores / CPUs doesn't mean it will use more than 1 of them for any particular application. That's almost completely the application's responsibility.
Donnie
I use L4 on a Asus 1001P duo-core Atom, with 2Gb Ram and a 5400RPM hard-drive. It's sufficiently fast for my needs, but I don't run any complex searches etc. on it, and I only have 600 resources.
It runs just fine though. No complaints, except the 10inch screen feels tiny compared to my 27" iMac
Hey Donnie,
I have an I-7 processor on my desktop and normally only one core runs at almost 100% and one other at a low percentage when it is indexing large files, the rest of the cores are idle. So much much for using all the cores to get a task done.
blessings,
danp
The Logos 4 Indexer is currently designed to use up to four cores when indexing; on my development Core i7-950 (hyperthreaded) and Xeon W3565 (basically an i7), it routinely achieves > 80% CPU usage (quad core) or > 40% (quad core, hyperthreaded) when indexing on a HDD (not a SSD). If you're seeing fewer than four cores active, I'd suspect either some kind of system configuration error limiting the number of cores that it can run on, or an excessively-slow IO subsystem that's causing the others core to stall by blocking on hard disk reads/writes.
Logos 4 itself has one dedicated UI thread (which has to perform all screen updates, user interaction, etc. due to the design of WPF); it will run as much non-UI work (searches, sync, DB queries) on as many background threads as your system can support.
(This only applies to the Windows version; some of the Mac threading code is written differently for the Mono platform.)
Has anyone done any measurements to see how many cores / sockets L4 will use during normal operation?
I upgraded my CPU from a 3.0 Ghz Pentium 4 to a 2.53 Ghz Dual Core Pentium E5200 and the difference in performance with Logos 4 was tremendous. I don't have any indexing statistics to compare but I know my load time and time to perform various searches are much shorter than with the old CPU.
Your point about core usage being dependent upon the application is true. But I suspect an operation such as indexing would be more dependent on hard drive and memory speed than it would on CPU cores and speed. Also, available memory would be a major factor.
I have an HP Mini netbook, Intel Atom, and Windows 7 Starter. Its got a single ram socket, and currently only the original 1 gb ram.
Logos4 installs and runs, but its not fast. The index of the 2000+ resources took maybe 24 hours, so no rushing that part.
I hope I can replace the 1 GB ram module with a 2 in due course, but it works OK without; just not fast.
Intel CPU id tool reports its got an Intel Atom N455 @1.66 GHz. Windows Task Manager shows two cpu graphs, so I guess its dual-core.
Tim, have you run Novabench's benchmark? Or know what the Windows Experience Index is? (Right-click Computer, Properties)
