Messages in this thread | | | Date | Wed, 2 Jan 2008 20:35:03 +0100 | From | Matthias Schniedermeyer <> | Subject | Why is deleting (or reading) files not counted as IO-Wait in top? |
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Hi
Currently i'm deleting about 500.000 files on a XFS-filesystem which takes a few minutes, as i had a top open i saw that 'wa' is shown as 0.0% (Nothing else running currently) and everything except 'id' is near the bottom too. Kernel is 2.6.23.11.
So, as 'rm -rf' is essentially a IO (or seek, to be more correct)-bound task, shouldn't that count as "Waiting for IO"?
The man-page of top says: 'Amount of time the CPU has been waiting for I/O to complete.'
But AFAICT wa only seams to be (ac)counted for writing and not for reading. I come to that conclusion because, when i fire 'sync' i can see some percent wa for a few seconds.
Bis denn
-- Real Programmers consider "what you see is what you get" to be just as bad a concept in Text Editors as it is in women. No, the Real Programmer wants a "you asked for it, you got it" text editor -- complicated, cryptic, powerful, unforgiving, dangerous.
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