HFS and 100% CPU

maverick · **on:** February 20, 2005, 04:51:39 AM

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When doing a local upload, is it normal for HFS to use 100% CPU resources until the transfer finishes making the system sluggish and unresponsive until the process is done? And what can be done about it?

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~~[/color] UPDATE [/b]~~[/b]
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The problem of cpu resource hogging processes that render a system unuseable until those processes finish whatever they are doing is "solved"[/color] with the help of a small freeware[/b] utility.

Read my post here --> http://www.rejetto.com/forum/viewtopic.php?t=2171&sid=3686cd037c922ce8bd9d18a9e5d5ba7a

maverick

Rafi · **Reply #1 on:** February 20, 2005, 06:01:38 PM

Yes, normal. Why not ? does your CPU have "better" things to do ?

I assure you that upload from the outside - will not take 100% CPU...

rejetto · **Reply #2 on:** February 20, 2005, 07:12:21 PM

Windows does take a lot of CPU trasferring data on the network.
i wonder if Linux does it too.

rejetto · **Reply #3 on:** February 21, 2005, 11:20:03 PM

try disabling your firewall and see if the CPU decreases

rejetto · **Reply #4 on:** February 23, 2005, 07:49:06 AM

no wonder
anyway: what CPU do you have and what's your highest speed with HFS ? (with disabled firewall)

rejetto · **Reply #5 on:** February 23, 2005, 07:55:32 AM

i found from a test that my system (centrino 1.3) can reach 47MB/s from localhost to localhost. (i used ttcp to do the test)
this is much more i expected.
of course this is theoretic speed, because i get it with no disk reading/writing.
disk activity, GUI, programming abstraction, etc, is slowing down HFS.
that's ok, but now i wonder if we can improve speed.
this requires lots of tests, i can't do them now.
it is a long time i do not compare HFS speed with Apache speed.
i guess Apache can be thought as the best i can get, as speed, since it is highly optimized for speed (HFS is not)

Note: you may think speed is not related to CPU 100%, but it is.
If i can reach an higher speed with 100%, then i can reach the lower speed (the current one) using less CPU.

Rafi · **Reply #6 on:** February 23, 2005, 04:36:57 PM

Quote from: "rejetto"

Note: you may think speed is not related to CPU 100%, but it is.
If i can reach an higher speed with 100%, then i can reach the lower speed (the current one) using less CPU.

I think that although your theory of speed vs CPU is correct, it has really nothing to do with real life (on the Internet...) . No one will use HFS in local LAN, and on the Internet - a 200KBps connection is considered relatively high speed (not 20MB...and usually - much lower!) . With this type of connection & speed HFS should not take but a fraction of the CPU power... unless it has bugs...

MarkV · **Reply #7 on:** February 23, 2005, 05:33:23 PM

Quote from: "Rafi"

No one will use HFS in local LAN

You are wrong, I use it for LAN with Gigabit Ethernet, so speed issues are important... :roll:

MarkV

Rafi · **Reply #8 on:** February 23, 2005, 05:40:59 PM

Quote from: "MarkV"

Quote from: "Rafi"
No one will use HFS in local LAN

You are wrong, I use it for LAN with Gigabit Ethernet, so speed issues are important... :roll:

MarkV

What is so bad with M$'s Windows' HD resource sharing ? Why don;t you use that ?

rejetto · **Reply #9 on:** February 23, 2005, 11:37:22 PM

sometimes i use HFS in LAN too
internet, for HFS, is only the primary target
we have other minor targets

MarkV · **Reply #10 on:** February 24, 2005, 09:24:33 AM

Quote from: "Rafi"

Quote from: "MarkV"
Quote from: "Rafi"
No one will use HFS in local LAN

You are wrong, I use it for LAN with Gigabit Ethernet, so speed issues are important... :roll:

MarkV
What is so bad with M$'s Windows' HD resource sharing ? Why don;t you use that ?

Since M$ decided to take rights management out of XP Home, there are only 2 choices: To share or not to share... :?
Some computers here even have shares disabled for security... HFS works regardless of that fact.

MarkV

rejetto · **Reply #11 on:** February 24, 2005, 05:34:05 PM

Quote from: "MarkV"

Since M$ decided to take rights management out of XP Home, there are only 2 choices: To share or not to share... :?

to share

google: scesp4i

MarkV · **Reply #12 on:** February 25, 2005, 01:45:10 AM

Quote from: "rejetto"

Quote from: "MarkV"
Since M$ decided to take rights management out of XP Home, there are only 2 choices: To share or not to share... :?
to share
google: scesp4i

Although this program brings back the 'Security' tab for folders, I can not restrict use of my fileshares.
In WinXP Pro, I can set 'Max No. of users', access rights... I test it a little further and post if I found something.

MarkV

Rafi · **Reply #13 on:** February 25, 2005, 06:19:34 AM

:?: So, why not install the XP pro ? both home & pro cost almost the same ...

MarkV · **Reply #14 on:** February 25, 2005, 01:25:18 PM

Quote from: "Rafi"

:?: So, why not install the XP pro ? both home & pro cost almost the same ...

No, not here in good ol' Germany. XP Pro costs twice as much as XP Home...

Update: the shares' right management work if you boot in failsafe mode with network enabled. Very strange. :?: (The feature I mean is called 'Simple file sharing' I think)

Anyway, as it is OT, I'll stop now...

MarkV