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Use the ftrace buffer instances #38

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Use the ftrace buffer instances #38

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16 changes: 10 additions & 6 deletions execsnoop
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Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,11 @@
# 07-Jul-2014 Brendan Gregg Created this.

### default variables
tracing=/sys/kernel/debug/tracing
mkdir -p /sys/kernel/debug/tracing/instances/execsnoop
echo context-info > /sys/kernel/debug/tracing/instances/execsnoop/trace_options
tracing=/sys/kernel/debug/tracing/instances/execsnoop
kprobe_events=/sys/kernel/debug/tracing/kprobe_events
current_tracer=/sys/kernel/debug/tracing/current_tracer
flock=/var/tmp/.ftrace-lock; wroteflock=0
opt_duration=0; duration=; opt_name=0; name=; opt_time=0; opt_reexec=0
opt_argc=0; argc=8; max_argc=16; ftext=
Expand Down Expand Up @@ -93,7 +97,7 @@ function end {
cd $tracing
warn "echo 0 > events/kprobes/$kname/enable"
warn "echo 0 > events/sched/sched_process_fork/enable"
warn "echo -:$kname >> kprobe_events"
warn "echo -:$kname >> $kprobe_events"
warn "echo > trace"
(( wroteflock )) && warn "rm $flock"
}
Expand Down Expand Up @@ -188,12 +192,12 @@ function makeprobe {
makeprobe sys_execve

### setup and begin tracing
echo nop > current_tracer
if ! echo $kprobe >> kprobe_events 2>/dev/null; then
echo nop > $current_tracer
if ! echo $kprobe >> $kprobe_events 2>/dev/null; then
makeprobe stub_execve
if ! echo $kprobe >> kprobe_events 2>/dev/null; then
if ! echo $kprobe >> $kprobe_events 2>/dev/null; then
makeprobe do_execve
if ! echo $kprobe >> kprobe_events 2>/dev/null; then
if ! echo $kprobe >> $kprobe_events 2>/dev/null; then
edie "ERROR: adding a kprobe for execve. Exiting."
fi
fi
Expand Down
7 changes: 5 additions & 2 deletions iolatency
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Expand Up @@ -40,7 +40,10 @@
# 20-Jul-2014 Brendan Gregg Created this.

### default variables
tracing=/sys/kernel/debug/tracing
mkdir -p /sys/kernel/debug/tracing/instances/execsnoop
echo context-info > /sys/kernel/debug/tracing/instances/execsnoop/trace_options
tracing=/sys/kernel/debug/tracing/instances/execsnoop
current_tracer=/sys/kernel/debug/tracing/current_tracer
flock=/var/tmp/.ftrace-lock
bufsize_kb=4096
opt_device=0; device=; opt_iotype=0; iotype=; opt_timestamp=0
Expand Down Expand Up @@ -148,7 +151,7 @@ echo $$ > $flock || die "ERROR: unable to write $flock."
wroteflock=1

### setup and begin tracing
warn "echo nop > current_tracer"
warn "echo nop > $current_tracer"
warn "echo $bufsize_kb > buffer_size_kb"
filter=
if (( opt_iotype )); then
Expand Down
7 changes: 5 additions & 2 deletions iosnoop
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Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,10 @@
# 12-Jul-2014 Brendan Gregg Created this.

### default variables
tracing=/sys/kernel/debug/tracing
mkdir -p /sys/kernel/debug/tracing/instances/execsnoop
echo context-info > /sys/kernel/debug/tracing/instances/execsnoop/trace_options
tracing=/sys/kernel/debug/tracing/instances/execsnoop
current_tracer=/sys/kernel/debug/tracing/current_tracer
flock=/var/tmp/.ftrace-lock
bufsize_kb=4096
opt_duration=0; duration=; opt_name=0; name=; opt_pid=0; pid=; ftext=
Expand Down Expand Up @@ -177,7 +180,7 @@ cd $tracing || die "ERROR: accessing tracing. Root user? Kernel has FTRACE?
echo $$ > $flock || die "ERROR: unable to write $flock."

### setup and begin tracing
echo nop > current_tracer
echo nop > $current_tracer
warn "echo $bufsize_kb > buffer_size_kb"
filter=
if (( opt_iotype )); then
Expand Down
7 changes: 5 additions & 2 deletions killsnoop
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Expand Up @@ -48,7 +48,10 @@
# 13-Sep-2014 Martin Probst Created this.

### default variables
tracing=/sys/kernel/debug/tracing
mkdir -p /sys/kernel/debug/tracing/instances/execsnoop
echo context-info > /sys/kernel/debug/tracing/instances/execsnoop/trace_options
tracing=/sys/kernel/debug/tracing/instances/execsnoop
current_tracer=/sys/kernel/debug/tracing/current_tracer
flock=/var/tmp/.ftrace-lock; wroteflock=0
opt_duration=0; duration=; opt_name=0; name=; opt_pid=0; pid=; ftext=
opt_time=0; opt_fail=0; opt_file=0; file=
Expand Down Expand Up @@ -147,7 +150,7 @@ echo $$ > $flock || die "ERROR: unable to write $flock."
wroteflock=1

### setup and begin tracing
echo nop > current_tracer
echo nop > $current_tracer
if ! echo 1 > $kevent_entry/enable; then
edie "ERROR: enabling kill() entry tracepoint Exiting."
fi
Expand Down