|Subject:||High %user CPU in XFS|
|From:||Subranshu Patel <spatel.ml@xxxxxxxxx>|
|Date:||Sun, 17 Feb 2013 21:20:46 +0530|
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I created 2 filesystem on my system (RHEL 6.3, kernel 2.6.32) - XFS and EXT4 and mounted them. On both the filesystem I executed a program which performed the following: - Create large number of directories - Removing all the directories During the execution of the program, I monitored the %user and %system CPU usage (using sar command) For EXT4 the %user was 1% and %system was 21% For XFS the %user was 20% and %system was 52% But I am not able to understand %user consumption, since %user reports the CPU usage of the user level (application), shouldn't it be the same for both EXT4 and XFS? What are the factors that decide the %user component keeping in mind that only the filesystem is different?
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