One possible though onerous solution would be to wait until the multi-threaded process starts and then use "taskset -p -c <n> <pid>" on the individual threads to change the CPU affinity of each thread. Use "ps -L" to find the "light weight process id" (LWP) of the threads.
I'm not sure this would actually improve things, but if it did it might be possible to make a script that watches for these tasks and automatically spreads the load across multiple CPUs. Admittedly it's a total hack. It would be nice if Xilinx fixed the situation. Dave On Jun 6, 2012, at 9:55 AM, Mandana Amiri wrote: > You are right. I enabled it as Kim suggested and it hardly uses the second > core. > > Mandana > > On 05/06/2012 8:42 PM, Simon Scott wrote: >> Hi Mandana, Kim >> >> From my experiences, I have never actually seen any speed increase from >> enabling multithreading. But I guess it doesn't hurt to enable it anyway. >> >> Simon Scott >> >> On 05/06/2012 14:23, Kim Guzzino wrote: >>> Mandana, >>> The option for turning on multithreading for MAP is "-mt on" . >>> Edit "/mlib_devel/xps_lib/XPS_ROACH_base/etc/fastruntime.opt" >>> Add "-mt on;" under the Map section. >>> That's it. >>> >>> Kim Guzzino >>> >>> -----Original Message----- >>> From: [email protected] >>> [mailto:[email protected]] On Behalf Of Mandana Amiri >>> Sent: Tuesday, June 05, 2012 12:58 PM >>> To: Casper >>> Subject: [casper] How to enable multithreading in XST/PAR in 11.5? >>> >>> Hi everyone, >>> >>> I finally notice that xst and map are running on one CPU core only when I >>> try to compile our correlator design. I read on Xilinx website that Xilinx >>> 11.5 supports multi-threading for Virtex-5 series. Does anyone know how to >>> enable multithreading in Casper toolflow? >>> >>> Mandana >>> >>> >>> >>> >> >> > >
