Yeah, the iostat indicates very little disk activity, and since my machine is running servers for web, email and VPN what I'm seeing could be entirely unrelated to the build. As a comparison, my laptop (Dell Precision M4300) with an Intel Core Duo T7700 and 4GB of memory builds in about 8:30. That's a 32-bit JVM, so maybe I should run 32 bit on my desktop to see if that makes a difference. My suspicion is that because the Athlon X2 4200+ has no L3 cache (128K L1, 512K L2) it's having to go to main memory a lot. The T7700 has 4MB L2 per core and the Phenom has 6MB L3 shared across cores.
How does my current 7 minute build time compare with other people's experience? Derek On Wed, Mar 25, 2009 at 8:52 AM, David Pollak <[email protected] > wrote: > Weird. My 2133 is running at 1.2 Ghz and has an 800Mhz (at best) memory > speed. My experience with Lift builds on machines with a lot of memory is > that there's almost no disk access... everything is cached. > > > On Wed, Mar 25, 2009 at 6:32 AM, Derek Chen-Becker > <[email protected]>wrote: > >> Ubuntu 8.10 x64. Java is >> >> java version "1.6.0_12" >> Java(TM) SE Runtime Environment (build 1.6.0_12-b04) >> Java HotSpot(TM) 64-Bit Server VM (build 11.2-b01, mixed mode) >> >> Here's AMD's rundown of the difference between the CPUs: >> >> http://products.amd.com/en-us/DesktopCPUSideBySide.aspx?id=522&id=59 >> >> Note that I'm still using the original AM2 motherboard with the same >> DDR2-800 memory. The fact that it's AM2 means that the Phenom is downgrading >> its HyperTransport to the same speed as the Athlon X2 for bus access. >> >> I suppose I could benchmark it to see how it performs for other tasks. I'm >> not sure how much an SSD would help. I'll run a build and monitor iostat to >> see how much data transfer goes to/from the HDDs, but my machine typically >> runs a file cache of about 800-900MB of memory (6GB total), so I would >> suspect that most of what maven needs gets sucked into the cache. >> >> Derek >> >> On Wed, Mar 25, 2009 at 6:38 AM, David Pollak < >> [email protected]> wrote: >> >>> Derek, >>> What OS are you running? The old numbers are worse than my HP 2133 >>> Netbook which clocks in at 15 minutes for a full Lift build. >>> >>> Thanks, >>> >>> David >>> >>> On Tue, Mar 24, 2009 at 7:42 PM, Derek Chen-Becker < >>> [email protected]> wrote: >>> >>>> I just wanted to throw this out there in case anyone else is considering >>>> new hardware. I had an Athlon X2 4200+ powering my dev box (6GB of ram, 2 x >>>> RAID 1 SATA drives) and average build time for a "mvn clean install" for >>>> the >>>> entire liftweb project was roughly 17 minutes and 45 seconds. I just >>>> upgraded to a Phenom X3 720 (no change in any other hardware) and my build >>>> times are now about 7 minutes! I'm guessing that the L3 cache on the Phenom >>>> is a huge part of that, but I'm sure that the increased clock and newer >>>> core >>>> are helping a bit. >>>> >>>> Derek >>>> >>>> >>>> >>> >>> >>> -- >>> Lift, the simply functional web framework http://liftweb.net >>> Beginning Scala http://www.apress.com/book/view/1430219890 >>> Follow me: http://twitter.com/dpp >>> Git some: http://github.com/dpp >>> >>> >>> >> >> >> > > > -- > Lift, the simply functional web framework http://liftweb.net > Beginning Scala http://www.apress.com/book/view/1430219890 > Follow me: http://twitter.com/dpp > Git some: http://github.com/dpp > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~----------~----~----~----~------~----~------~--~---
