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Adding more checks and verbose error message: #1

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Adding more checks and verbose error message: #1

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12 changes: 12 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
1. Make sure that you're running a FreeBSD src tree which has support
for boot profiling.
2. Add 'options TSLOG' to your kernel configuration and `make kernel`.
3. After installing new kernel, loader and rebooting, to produce an SVG:
```
sh tslog.sh > ts.log
./stackcollapse-tslog.pl < ts.log | /usr/local/bin/perl flamechart.pl -flamechart -colors tslog > tslog.svg
```
4. To get a list of the top 10 stack leaves:
```
./stackcollapse-tslog.pl < ts.log | sh supercollapse.sh | head
```
8 changes: 0 additions & 8 deletions USAGE
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16 changes: 13 additions & 3 deletions tslog.sh
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Original file line number Diff line number Diff line change
@@ -1,9 +1,11 @@
#!/bin/sh

set -eu
SRCDIR=`pwd`
WRKDIR=`mktemp -d -t tslog` || exit 1
cd $WRKDIR

if [ `sysctl debug.tslog | wc -l` -ge 262144 ]; then
echo "WARNING: Maximum TSLOG entries detected, you should increase kernel config TSLOGSIZE" 1>&2
fi
sysctl -b debug.tslog > ts.log
LTSC=0
TSCOFFSET=0
Expand All @@ -16,7 +18,7 @@ while read TD TSC REST; do
LTSC=$TSC
NTSC=$((TSC + TSCOFFSET))
echo "$TD $NTSC $REST"
done < ts.log > ts.log.tmp
done < ts.log > ts.log.tmp 1>&2
mv ts.log.tmp ts.log
sort < ts.log > ts.log.sorted
cut -f 1 -d ' ' < ts.log | sort -u > threads
Expand Down Expand Up @@ -47,6 +49,14 @@ while read THREAD; do
echo "$TD $TSC STACK $STACK"
done > tslog.thread.$THREAD
done < threads
if [ ! -f tslog.thread.0x0 ]; then
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We could handle this case by processing what we have (i.e. kernel tslog). It wouldn't give us a complete picture of the boot process, but might still be better than nothing?

echo "No loader timestamp detected, are you using up-to-date loader?" 1>&2
exit
fi
if [ ! -f tslog.thread.start_init ]; then
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A better check would be for tsc.end existing -- if we have 'ENTER start_init' but the tslog buffer is truncated before 'EXIT start_init' then we'll have tslog.thread.start_init but not tsc.end.

echo "Overflow TSLOG buffer, you MUST increase TSLOGSIZE" 1>&2
exit
fi
cat tslog.thread.0x0 | sed -e 's/kernel;//' > ts.log.accumulated
cat tslog.thread.mi_startup tslog.thread.start_init >> ts.log.accumulated
TSCEND=`cat tsc.end`
Expand Down