Java performance issues with PXA255

2004-02-10 Thread shaun . k . brandt
I am attempting to get Java to run on my Lubbock board (with a PXA255) at a reasonable speed. The board is running a Linux system consisting of a 2.4.19-rmk7-pxa1 kernel using FastFPE, busybox 1.00- pre1 and KDrive built from XFree86 4.3 sources. Benchmark scores for the board seem to be OK

Re: TCP performance issues

2000-03-30 Thread John Rousseau
On Mar 29, 2000, Ekkehard Kraemer wrote: > Hallo John, > > JR>I'm thinking that the kernel TCP connection queues are filling up and > JR>further requsts are getting dropped, but at 20? > > Did you check ulimit (file handles)? > > Did you try 'lsof | grep TCP'? Maybe it shows thousands of "

Re: TCP performance issues

2000-03-29 Thread Chris Kakris
John Rousseau wrote: > > I'm doing some performance testing on our server and what I'm seeing > is a little disappointing. > > > > I'm thinking that the kernel TCP connection queues are filling up > and further requsts are getting dropped, but at 20? > > Any ideas on how to debug this would be

TCP performance issues

2000-03-29 Thread John Rousseau
I'm doing some performance testing on our server and what I'm seeing is a little disappointing. We're running JDK1.2.2-RC4 (native threads) on several different machines. I see almost identical behavior running on both of the following machines: quad 200MHz PII, 2GB memory, glibc 2.1.3, kernel

Re: TCP performance issues

2000-03-29 Thread Ekkehard Kraemer
Hallo John, JR>I'm thinking that the kernel TCP connection queues are filling up and JR>further requsts are getting dropped, but at 20? Did you check ulimit (file handles)? Did you try 'lsof | grep TCP'? Maybe it shows thousands of "zombie" TCP/IP connections. Which JDBC driver are you using

Re: TCP performance issues

2000-03-29 Thread John Rousseau
On Thursday Mar 30, 2000, Peter Schuller wrote: > > Our application server starts rejecting TCP connections (actually, > > the OS does, our app never sees these rejected requests) at about 20 > > simultaneous requests. The load average on the system runs a little > > high (5-10) when requests st

Re: Performance issues, TYA

1999-03-31 Thread Albrecht Kleine
> Hi, > > Has anybody run any benchmarks comparing jdk117 with tya vs jdk1.2 with > sunwjit? > My runs so far (console applications with timing), indicate that > ***jdk1.1.7+tya1.2 is at least two times faster than jdk1.2-pre1!!!*** > This behavior is for computationally intensive procedures, I d

Performance issues

1999-03-30 Thread Dimitris Vyzovitis
Hi, Has anybody run any benchmarks comparing jdk117 with tya vs jdk1.2 with sunwjit? My runs so far (console applications with timing), indicate that ***jdk1.1.7+tya1.2 is at least two times faster than jdk1.2-pre1!!!*** This behavior is for computationally intensive procedures, I don't refer to