Sukanto Ghosh wrote:
1. How to determine the number of processes in memory ? (inside kernel code, not shell : ps -ef | wc -l )
Add up all the processes with a non-zero RSS.
2. Is there any provision for swapping out entire process in linux (as solaris has) ?
Doing that is just not realistic any more on modern systems. Over the past 15 years, memory sizes have increased by a factor 1000 while disk seek times were reduced by a factor 8 and disk throughput has increased by a factor 20 or so. Programs have also increased with the size of memory. That means the latency involved with swapping a whole process has increased by about a factor 10-100 in the last 15 years. In short, whole process swapping is way too slow on modern systems.
If no, then how to make sure that a process all of whose pages have been swapped out is not scheduled again ? (may be by changing the process-state) And, how to later enable the process so that it gets scheduled ?
You can stop and continue processes from userspace, look into SIGSTOP and SIGCONT. -- All rights reversed. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
