VCMD HowTo: Difference between revisions
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imported>Hollow m (Linux-VServer-Hacks moved to VCMD HowTo: needed a more descriptive name, should be extended with some introduction to vcmd) |
imported>Glenn m (spelling) |
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* create a virtualized init task | * create a virtualized init task | ||
: <pre>vcmd -i 100 -BC ctx_create .flagword=^34^33^32^4 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status</pre> | : <pre>vcmd -i 100 -BC ctx_create .flagword=^34^33^32^4 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status</pre> | ||
* set context 100 dentry (hard) limit (22) to 4000 | |||
: <pre>vcmd -i 100 -BC set_rlimit .id=22 .maximum=4000</pre> | |||
* start a cpuhog with sched_hard (supposed to get 25% by default) | |||
: <pre>vcmd -i 100 -BC ctx_create .flagword=^34^33^32^8 -- cpuhog</pre> | |||
* translate switch debugging to readable names | |||
: <pre>dmesg | while read vxd vc vcmd LINE; do test "$vxd $vc" != "vxD: vc:" && continue; vcmd=${vcmd/,/}; text=`vcmd -d -C "$vcmd" | head -n 1 | sed 's/://'`; test "$text" = "unknown VCMD" && text="$vcmd"; printf "%-30s %s\n" "$text" "$LINE"; done</pre> | |||
[[Category:Documentation]] | |||
Latest revision as of 19:01, 21 October 2011
VCMD one-liners (by Bertl)[edit]
- create a non virtualized init task
vcmd -i 100 -BC ctx_create .flagword=^34^33^32 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status
- create a virtualized init task
vcmd -i 100 -BC ctx_create .flagword=^34^33^32^4 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status
- set context 100 dentry (hard) limit (22) to 4000
vcmd -i 100 -BC set_rlimit .id=22 .maximum=4000
- start a cpuhog with sched_hard (supposed to get 25% by default)
vcmd -i 100 -BC ctx_create .flagword=^34^33^32^8 -- cpuhog
- translate switch debugging to readable names
dmesg | while read vxd vc vcmd LINE; do test "$vxd $vc" != "vxD: vc:" && continue; vcmd=${vcmd/,/}; text=`vcmd -d -C "$vcmd" | head -n 1 | sed 's/://'`; test "$text" = "unknown VCMD" && text="$vcmd"; printf "%-30s %s\n" "$text" "$LINE"; done