Is ftrace functional with latest kernel on powerpc (32-bit) ? I was checking basic functionality using the README steps. The output of tracing/trace includes the header but nothing more (no trace lines). It appears broken unless I'm missing something.
Below is the interaction. Lee # mkdir /debug # mount -t debugfs nodev /debug # cat /debug/tracing/available_tracers wakeup function sched_switch nop # cat /debug/tracing/current_tracer nop # echo sched_switch > /debug/tracing/current_tracer # cat /debug/tracing/current_tracer sched_switch # cat /debug/tracing/trace_options print-parent nosym-offset nosym-addr noverbose noraw nohex nobin noblock nostack trace nosched-tree ftrace_printk noftrace_preempt nobranch annotate nouserstackt race nosym-userobj noprintk-msg-only # echo 1 > /debug/tracing/tracing_enabled # sleep 1 # cat /debug/tracing/trace > /tmp/trace.txt # echo 0 > /debug/tracing/tracing_enabled # cat /tmp/trace.txt # tracer: sched_switch # # TASK-PID CPU# TIMESTAMP FUNCTION # | | | | | # # # # uname -a Linux freescale 2.6.29-rc2-00013-gf3b8436 #12 Mon Jan 19 11:28:33 CST 2009 ppc unknown # # gunzip -c - < /proc/config.gz | egrep 'FTRACE|FUNCTION|SCHED_TRACER' CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_FUNCTION_TRACER=y CONFIG_SCHED_TRACER=y CONFIG_DYNAMIC_FTRACE=y CONFIG_FTRACE_MCOUNT_RECORD=y CONFIG_FTRACE_SELFTEST=y CONFIG_FTRACE_STARTUP_TEST=y # dmesg | grep trace ftrace: allocating 8054 entries in 40 pages Testing tracer nop: PASSED Testing tracer sched_switch: PASSED Testing tracer function: PASSED Testing dynamic ftrace: PASSED Testing tracer wakeup: PASSED # _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
