diff options
Diffstat (limited to 'tapsets.cxx')
| -rw-r--r-- | tapsets.cxx | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/tapsets.cxx b/tapsets.cxx index 50386480..278cc60c 100644 --- a/tapsets.cxx +++ b/tapsets.cxx @@ -94,7 +94,13 @@ derived_probe::emit_probe_prologue (translator_output* o, { o->newline() << "struct context* c;"; o->newline() << "unsigned long flags;"; + o->newline() << "#ifdef STP_TIMING"; + o->newline() << "cycles_t cycles_atstart;"; + o->newline() << "#endif"; o->newline() << "local_irq_save (flags);"; + o->newline() << "#ifdef STP_TIMING"; + o->newline() << "cycles_atstart = get_cycles ();"; + o->newline() << "#endif"; o->newline() << "c = per_cpu_ptr (contexts, smp_processor_id());"; o->newline() << "if (atomic_read (&session_state) != " << statereq << ")"; o->newline(1) << "goto probe_epilogue;"; @@ -139,7 +145,17 @@ derived_probe::emit_probe_epilogue (translator_output* o) o->newline() << "atomic_dec (&c->busy);"; o->newline(-1) << "probe_epilogue:"; - o->newline(1) << "local_irq_restore (flags);"; + o->newline(1) << "#ifdef STP_TIMING"; + o->newline() << "{"; + o->newline(1) << "cycles_t cycles_atend = get_cycles ();"; + o->newline() << "int64_t cycles_elapsed = (cycles_atend > cycles_atstart)"; + o->newline(1) << "? (int64_t) (cycles_atend - cycles_atstart)"; + o->newline() << ": (int64_t) (~(cycles_t)0) - cycles_atstart + cycles_atend + 1;"; + o->newline() << "_stp_stat_add(time_" << name << ",cycles_elapsed);"; + o->indent(-1); + o->newline(-1) << "}"; + o->newline() << "#endif"; + o->newline() << "local_irq_restore (flags);"; } @@ -198,6 +214,10 @@ be_derived_probe::emit_deregistrations (translator_output* o) void be_derived_probe::emit_probe_entries (translator_output* o) { + o->newline() << "#ifdef STP_TIMING"; + o->newline() << "static __cacheline_aligned Stat " << "time_" << name << ";"; + o->newline() << "#endif"; + for (unsigned i=0; i<locations.size(); i++) { probe_point *l = locations[i]; @@ -3056,6 +3076,10 @@ dwarf_derived_probe::emit_probe_entries (translator_output* o) } o->newline(-1) << "};"; + o->newline(); + o->newline() << "#ifdef STP_TIMING"; + o->newline() << "static __cacheline_aligned Stat " << "time_" << name << ";"; + o->newline() << "#endif"; // Construct a single entry function, and a struct kprobe pointing into // the entry function. The entry function will call the probe function. |