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Diffstat (limited to 'schulung_tools/ipc_shm/README')
| -rw-r--r-- | schulung_tools/ipc_shm/README | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/schulung_tools/ipc_shm/README b/schulung_tools/ipc_shm/README new file mode 100644 index 0000000..bea6c98 --- /dev/null +++ b/schulung_tools/ipc_shm/README @@ -0,0 +1,30 @@ +#!/bin/sh + +# build programs send/recv +make + +# find uprobe offsets (search for "uprobe") +objdump -D -F -S send | less +objdump -D -F -S recv | less + +# create uprobe events (as root) +echo "p:sending `pwd`/send:0x1055" > /sys/kernel/debug/tracing/uprobe_events +echo "p:received `pwd`/recv:0xff1" >> /sys/kernel/debug/tracing/uprobe_events + +# run receiver +sudo taskset 1 chrt -f 80 ./recv & + +# run sender (wrapping with trace-cmd) +sudo trace-cmd record \ + -e sched:sched_switch \ + -e sched:sched_wakeup \ + -e sched:sched_pi_setprio \ + -e uprobes:sending \ + -e uprobes:received \ + -e raw_syscalls:sys_enter \ + -e raw_syscalls:sys_exit \ + taskset 1 chrt -f 70 ./send +(type message and hit return) + +# view results +kernelshark |