Difference between revisions of "VCMD HowTo"
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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" "$LINE"; done</pre> | ||
| + | |||
| + | [[Category:Documentation]] | ||
Latest revision as of 20:01, 21 October 2011
[edit] VCMD one-liners (by Bertl)
- create a non virtualized init task
-
vcmd -i 100 -BC ctx_create .flagword=^34^33^32 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status
- create a virtualized init task
-
vcmd -i 100 -BC ctx_create .flagword=^34^33^32^4 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status
- set context 100 dentry (hard) limit (22) to 4000
-
vcmd -i 100 -BC set_rlimit .id=22 .maximum=4000
- start a cpuhog with sched_hard (supposed to get 25% by default)
-
vcmd -i 100 -BC ctx_create .flagword=^34^33^32^8 -- cpuhog
- translate switch debugging to readable names
-
dmesg | while read vxd vc vcmd LINE; do test "$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
