Continuation of previous post. A. 100% CPU remedy. Original background 1. test environment Pentium E2180/CentOS 5.2 (32-bit)/DOSEMU+FreeDOS 1.4.0 from website. 2. I found maximum 4 instances on single host, after that random delay and hangs 3. Std OS environment without any modification. To arrive at a solution 1. tried several DOS utilities, example dosidles, even citrix utility 2. I spent weeks trying many combination. Finally I adopted a combined recommendations from list member Joe to run BX200FIX and setting nice value. I added a CPU control as well. Example below EXAMPLE: taskset -c 1 nice -n 19 dosemu run DOSEMU with nice value of 19 on CPU Core number 1. Dualcore CPU core is 0,1 Quad Core is 0,1,2,3 After implementation, I tested up to 6 clipper-based app instances on 1 cpu core and found response reasonable and stable, no random hangs. Based on my assessment of the overall situation, I feel 6 session/cpu-core is the maximum I am willing to commit. Since I have quad-core host now, I am willing to spread the load across to gain a bit of buffer zone. Note that try not to use Core-0 for dosemu because that's the default for OS and system services. The high cache size on Quad Core also help I think in reducing the memory contention issue. -- To unsubscribe from this list: send the line "unsubscribe linux-msdos" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
