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Re: QNX6 fs uses a lot of RAM?
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12/09/2014 8:18 AM
post112575
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Re: QNX6 fs uses a lot of RAM?
It's io-blk cache - it defaults to 15% of RAM IIRC. Check the docs for io-blk.
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Re: QNX6 fs uses a lot of RAM?
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12/09/2014 8:18 AM
post112576
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Re: QNX6 fs uses a lot of RAM?
Use the "blk cache=" parameter to limit the amount of RAM utilized.
# devb-eide blk cache=2m
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Re: QNX6 fs uses a lot of RAM?
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12/09/2014 8:18 AM
post112577
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Re: QNX6 fs uses a lot of RAM?
There needs to be a comma between the ramdisk and cache options.
Cheers.
Sent from my BlackBerry 10 smartphone on the Fido network.
Original Message
From: Robert Murrell
Sent: Tuesday, December 9, 2014 8:14 AM
To: general-filesystems
Reply To: general-filesystems@community.qnx.com
Subject: QNX6 fs uses a lot of RAM?
At least I think its the culprit. I'm developing under QNX 6.5.0. Our system is an x86 PC-104 with 256 MB of RAM. The
devb-eide task is consuming 49MB of RAM. The file system is on a 2GB Compact Flash. I start the drivers as follows:
devb-eide quiet blk ramdisk=10m cache=2m qnx6 &
waitfor /dev/hd0
mount -t qnx6 -o sync=optional /dev/hd0t177 /
The ramdisk is occupying 10MB of this. I've tried some of the memory saving tricks documented for io-blk but they did
not seem to change this value. I understand the nature of the the power fail safe system might use a lot of RAM, but is
there any way I can control the RAM usage?
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