Comment #3 on issue 21884 by Robert.Bradbury: Parts of browser completely unresponsive (frozen) while CPU usage on 100% http://code.google.com/p/chromium/issues/detail?id=21884
On Linux the commands you are looking for are "renice" (for running processes) and "chrt" which can CHange the "Real-Time" scheduling attributes of a process. In practice I have found (on Linux) that niced processes will still not run "nicely" with processes which frequently talk to the X server (Firefox, chrome, etc.). I believe this is due to interactions with the poll(), read() and writev() calls (which I believe are process to X server exchanges of messages). One sees more of the problem (on Linux) when trying to run a program like "alsaplayer" to play music from on-the-disk mp3 files as a non-super-user in non- real-time mode. The music will occasionally "stutter" when other programs grab the CPU. In real-time mode (alsaplayer --realtime ...) as the superuser it will work pretty well but I think its one of the few programs under Linux that takes advantage of real-time features and from looking at the source code I'd say that even its handling of priority setting and locking only the needed portions of itself in memory is sub-optimal. One can work around this through the clever use of chrt. One can chrt --fifo to increase the priority (of X, chrome, etc.) or use chrt --batch or chrt --idle to decrease the priority of heavy CPU using processes. It would seem best to run heavy CPU use programs to use the "idle" scheduling class so they do not interfere with user programs. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings -- Automated mail from issue updates at http://crbug.com/ Subscription options: http://groups.google.com/group/chromium-bugs
