diff options
| -rwxr-xr-x | runtime/probes/bench/run_bench | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/runtime/probes/bench/run_bench b/runtime/probes/bench/run_bench index fc27731d..48a60adb 100755 --- a/runtime/probes/bench/run_bench +++ b/runtime/probes/bench/run_bench @@ -57,9 +57,12 @@ if {[catch {exec ./time} res1]} { exit -1 } +set r_overhead [lindex $res1 0] +set w_overhead [lindex $res1 1] + set res2 [do_time bench] -set t_kprobe [expr [lindex $res2 0] - [lindex $res1 0]] -set t_jprobe [expr [lindex $res2 1] - [lindex $res1 1]] +set t_kprobe [expr [lindex $res2 0] - $r_overhead] +set t_jprobe [expr [lindex $res2 1] - $w_overhead] puts "Jprobes overhead = $t_jprobe ns" puts "Kprobes overhead = $t_kprobe ns" @@ -67,8 +70,8 @@ puts "--------------------------------------" if {[file exists bench_ret.ko]} { set res2 [do_time bench_ret] - set t_ret [expr [lindex $res2 0] - [lindex $res1 0]] - set t_entret [expr [lindex $res2 1] - [lindex $res1 1]] + set t_ret [expr [lindex $res2 0] - $r_overhead] + set t_entret [expr [lindex $res2 1] - $w_overhead] puts "Return probe overhead = $t_ret ns" puts "Entry+Return probe overhead = $t_entret ns" @@ -76,16 +79,17 @@ if {[file exists bench_ret.ko]} { } set res2 [do_time bench_multi] -set t_k2 [expr [lindex $res2 0] - [lindex $res1 0]] -set t_k4 [expr [lindex $res2 1] - [lindex $res1 1]] +set t_k2 [expr [lindex $res2 0] - $r_overhead] +set t_k4 [expr [lindex $res2 1] - $w_overhead] puts "2 kprobes on same func = $t_k2 ns" puts "4 kprobes on same func = $t_k4 ns" puts "--------------------------------------" set res2 [do_time bench_io1] -set t_printf [expr [lindex $res2 0] - [lindex $res1 0] - $t_kprobe] -set t_print [expr [lindex $res2 1] - [lindex $res1 1] - $t_kprobe] +# subtract function call overhead and kprobe overhead +set t_printf [expr [lindex $res2 0] - $r_overhead - $t_kprobe] +set t_print [expr [lindex $res2 1] - $w_overhead - $t_kprobe] puts "NETLINK" puts "_stp_printf on 100 chars = $t_printf ns" @@ -94,8 +98,9 @@ puts "--------------------------------------" exec sleep 4 set res2 [do_time bench_io2] -set t_printf [expr [lindex $res2 0] - [lindex $res1 0] - $t_kprobe] -set t_print [expr [lindex $res2 1] - [lindex $res1 1] - $t_kprobe] +# subtract function call overhead and kprobe overhead +set t_printf [expr [lindex $res2 0] - $r_overhead - $t_kprobe] +set t_print [expr [lindex $res2 1] - $w_overhead - $t_kprobe] puts "RELAYFS" puts "_stp_printf on 100 chars = $t_printf ns" |