diff options
Diffstat (limited to 'Python/ceval.c')
| -rw-r--r-- | Python/ceval.c | 169 |
1 files changed, 1 insertions, 168 deletions
diff --git a/Python/ceval.c b/Python/ceval.c index b2ddaa3170..d3bd8b569b 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -20,82 +20,6 @@ #include <ctype.h> -#ifndef WITH_TSC - -#define READ_TIMESTAMP(var) - -#else - -typedef unsigned long long uint64; - -/* PowerPC support. - "__ppc__" appears to be the preprocessor definition to detect on OS X, whereas - "__powerpc__" appears to be the correct one for Linux with GCC -*/ -#if defined(__ppc__) || defined (__powerpc__) - -#define READ_TIMESTAMP(var) ppc_getcounter(&var) - -static void -ppc_getcounter(uint64 *v) -{ - unsigned long tbu, tb, tbu2; - - loop: - asm volatile ("mftbu %0" : "=r" (tbu) ); - asm volatile ("mftb %0" : "=r" (tb) ); - asm volatile ("mftbu %0" : "=r" (tbu2)); - if (__builtin_expect(tbu != tbu2, 0)) goto loop; - - /* The slightly peculiar way of writing the next lines is - compiled better by GCC than any other way I tried. */ - ((long*)(v))[0] = tbu; - ((long*)(v))[1] = tb; -} - -#elif defined(__i386__) - -/* this is for linux/x86 (and probably any other GCC/x86 combo) */ - -#define READ_TIMESTAMP(val) \ - __asm__ __volatile__("rdtsc" : "=A" (val)) - -#elif defined(__x86_64__) - -/* for gcc/x86_64, the "A" constraint in DI mode means *either* rax *or* rdx; - not edx:eax as it does for i386. Since rdtsc puts its result in edx:eax - even in 64-bit mode, we need to use "a" and "d" for the lower and upper - 32-bit pieces of the result. */ - -#define READ_TIMESTAMP(val) do { \ - unsigned int h, l; \ - __asm__ __volatile__("rdtsc" : "=a" (l), "=d" (h)); \ - (val) = ((uint64)l) | (((uint64)h) << 32); \ - } while(0) - - -#else - -#error "Don't know how to implement timestamp counter for this architecture" - -#endif - -void dump_tsc(int opcode, int ticked, uint64 inst0, uint64 inst1, - uint64 loop0, uint64 loop1, uint64 intr0, uint64 intr1) -{ - uint64 intr, inst, loop; - PyThreadState *tstate = PyThreadState_Get(); - if (!tstate->interp->tscdump) - return; - intr = intr1 - intr0; - inst = inst1 - inst0 - intr; - loop = loop1 - loop0 - intr; - fprintf(stderr, "opcode=%03d t=%d inst=%06lld loop=%06lld\n", - opcode, ticked, inst, loop); -} - -#endif - /* Turn this on if your compiler chokes on the big switch: */ /* #define CASE_TOO_BIG 1 */ @@ -108,11 +32,7 @@ void dump_tsc(int opcode, int ticked, uint64 inst0, uint64 inst1, typedef PyObject *(*callproc)(PyObject *, PyObject *, PyObject *); /* Forward declarations */ -#ifdef WITH_TSC -static PyObject * call_function(PyObject ***, Py_ssize_t, PyObject *, uint64*, uint64*); -#else static PyObject * call_function(PyObject ***, Py_ssize_t, PyObject *); -#endif static PyObject * fast_function(PyObject *, PyObject **, Py_ssize_t, PyObject *); static PyObject * do_call_core(PyObject *, PyObject *, PyObject *); @@ -938,46 +858,6 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) #define GETITEM(v, i) PyTuple_GetItem((v), (i)) #endif -#ifdef WITH_TSC -/* Use Pentium timestamp counter to mark certain events: - inst0 -- beginning of switch statement for opcode dispatch - inst1 -- end of switch statement (may be skipped) - loop0 -- the top of the mainloop - loop1 -- place where control returns again to top of mainloop - (may be skipped) - intr1 -- beginning of long interruption - intr2 -- end of long interruption - - Many opcodes call out to helper C functions. In some cases, the - time in those functions should be counted towards the time for the - opcode, but not in all cases. For example, a CALL_FUNCTION opcode - calls another Python function; there's no point in charge all the - bytecode executed by the called function to the caller. - - It's hard to make a useful judgement statically. In the presence - of operator overloading, it's impossible to tell if a call will - execute new Python code or not. - - It's a case-by-case judgement. I'll use intr1 for the following - cases: - - IMPORT_STAR - IMPORT_FROM - CALL_FUNCTION (and friends) - - */ - uint64 inst0, inst1, loop0, loop1, intr0 = 0, intr1 = 0; - int ticked = 0; - - READ_TIMESTAMP(inst0); - READ_TIMESTAMP(inst1); - READ_TIMESTAMP(loop0); - READ_TIMESTAMP(loop1); - - /* shut up the compiler */ - opcode = 0; -#endif - /* Code access macros */ #ifdef WORDS_BIGENDIAN @@ -1225,23 +1105,6 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) #endif for (;;) { -#ifdef WITH_TSC - if (inst1 == 0) { - /* Almost surely, the opcode executed a break - or a continue, preventing inst1 from being set - on the way out of the loop. - */ - READ_TIMESTAMP(inst1); - loop1 = inst1; - } - dump_tsc(opcode, ticked, inst0, inst1, loop0, loop1, - intr0, intr1); - ticked = 0; - inst1 = 0; - intr0 = 0; - intr1 = 0; - READ_TIMESTAMP(loop0); -#endif assert(stack_pointer >= f->f_valuestack); /* else underflow */ assert(STACK_LEVEL() <= co->co_stacksize); /* else overflow */ assert(!PyErr_Occurred()); @@ -1260,9 +1123,6 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) a try: finally: block uninterruptible. */ goto fast_next_opcode; } -#ifdef WITH_TSC - ticked = 1; -#endif if (_Py_atomic_load_relaxed(&pendingcalls_to_do)) { if (Py_MakePendingCalls() < 0) goto error; @@ -1353,9 +1213,6 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) } #endif - /* Main switch on opcode */ - READ_TIMESTAMP(inst0); - switch (opcode) { /* BEWARE! @@ -2966,11 +2823,9 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) PyObject *fromlist = POP(); PyObject *level = TOP(); PyObject *res; - READ_TIMESTAMP(intr0); res = import_name(f, name, fromlist, level); Py_DECREF(level); Py_DECREF(fromlist); - READ_TIMESTAMP(intr1); SET_TOP(res); if (res == NULL) goto error; @@ -2989,9 +2844,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) "no locals found during 'import *'"); goto error; } - READ_TIMESTAMP(intr0); err = import_all_from(locals, from); - READ_TIMESTAMP(intr1); PyFrame_LocalsToFast(f, 0); Py_DECREF(from); if (err != 0) @@ -3003,9 +2856,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) PyObject *name = GETITEM(names, oparg); PyObject *from = TOP(); PyObject *res; - READ_TIMESTAMP(intr0); res = import_from(from, name); - READ_TIMESTAMP(intr1); PUSH(res); if (res == NULL) goto error; @@ -3403,11 +3254,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) PyObject **sp, *res; PCALL(PCALL_ALL); sp = stack_pointer; -#ifdef WITH_TSC - res = call_function(&sp, oparg, NULL, &intr0, &intr1); -#else res = call_function(&sp, oparg, NULL); -#endif stack_pointer = sp; PUSH(res); if (res == NULL) { @@ -3423,11 +3270,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) assert(PyTuple_CheckExact(names) && PyTuple_GET_SIZE(names) <= oparg); PCALL(PCALL_ALL); sp = stack_pointer; -#ifdef WITH_TSC - res = call_function(&sp, oparg, names, &intr0, &intr1); -#else res = call_function(&sp, oparg, names); -#endif stack_pointer = sp; PUSH(res); Py_DECREF(names); @@ -3449,9 +3292,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) assert(PyTuple_CheckExact(callargs)); func = TOP(); - READ_TIMESTAMP(intr0); result = do_call_core(func, callargs, kwargs); - READ_TIMESTAMP(intr1); Py_DECREF(func); Py_DECREF(callargs); Py_XDECREF(kwargs); @@ -3602,7 +3443,6 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag) assert(0); error: - READ_TIMESTAMP(inst1); assert(why == WHY_NOT); why = WHY_EXCEPTION; @@ -3706,7 +3546,6 @@ fast_block_end: if (why != WHY_NOT) break; - READ_TIMESTAMP(loop1); assert(!PyErr_Occurred()); @@ -4922,11 +4761,7 @@ if (tstate->use_tracing && tstate->c_profilefunc) { \ } static PyObject * -call_function(PyObject ***pp_stack, Py_ssize_t oparg, PyObject *kwnames -#ifdef WITH_TSC - , uint64* pintr0, uint64* pintr1 -#endif - ) +call_function(PyObject ***pp_stack, Py_ssize_t oparg, PyObject *kwnames) { PyObject **pfunc = (*pp_stack) - oparg - 1; PyObject *func = *pfunc; @@ -4964,14 +4799,12 @@ call_function(PyObject ***pp_stack, Py_ssize_t oparg, PyObject *kwnames stack = (*pp_stack) - nargs - nkwargs; - READ_TIMESTAMP(*pintr0); if (PyFunction_Check(func)) { x = fast_function(func, stack, nargs, kwnames); } else { x = _PyObject_FastCallKeywords(func, stack, nargs, kwnames); } - READ_TIMESTAMP(*pintr1); Py_DECREF(func); } |