diff options
Diffstat (limited to 'erts/emulator/hipe/hipe_bif1.c')
-rw-r--r-- | erts/emulator/hipe/hipe_bif1.c | 62 |
1 files changed, 38 insertions, 24 deletions
diff --git a/erts/emulator/hipe/hipe_bif1.c b/erts/emulator/hipe/hipe_bif1.c index 5188950e17..87cdfb8c7a 100644 --- a/erts/emulator/hipe/hipe_bif1.c +++ b/erts/emulator/hipe/hipe_bif1.c @@ -1,22 +1,23 @@ /* * %CopyrightBegin% - * - * Copyright Ericsson AB 2001-2009. All Rights Reserved. - * + + * + * Copyright Ericsson AB 2001-2011. All Rights Reserved. + * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in * compliance with the License. You should have received a copy of the * Erlang Public License along with this software. If not, it can be * retrieved online at http://www.erlang.org/. - * + * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. - * + * * %CopyrightEnd% */ -/* $Id$ +/* * hipe_bif1.c * * Performance analysis support. @@ -876,22 +877,44 @@ BIF_RETTYPE hipe_bifs_misc_timer_clear_0(BIF_ALIST_0) * + The fallback, which is the same as {X,_} = runtime(statistics). */ +static double fallback_get_hrvtime(void) +{ + unsigned long ms_user; + + elapsed_time_both(&ms_user, NULL, NULL, NULL); + return (double)ms_user; +} + #if USE_PERFCTR #include "hipe_perfctr.h" -static int hrvtime_is_open; -#define hrvtime_is_started() hrvtime_is_open +static int hrvtime_started; /* 0: closed, +1: perfctr, -1: fallback */ +#define hrvtime_is_started() (hrvtime_started != 0) static void start_hrvtime(void) { if (hipe_perfctr_hrvtime_open() >= 0) - hrvtime_is_open = 1; + hrvtime_started = 1; + else + hrvtime_started = -1; +} + +static void stop_hrvtime(void) +{ + if (hrvtime_started > 0) + hipe_perfctr_hrvtime_close(); + hrvtime_started = 0; } -#define get_hrvtime() hipe_perfctr_hrvtime_get() -#define stop_hrvtime() hipe_perfctr_hrvtime_close() +static double get_hrvtime(void) +{ + if (hrvtime_started > 0) + return hipe_perfctr_hrvtime_get(); + else + return fallback_get_hrvtime(); +} -#else +#else /* !USE_PERFCTR */ /* * Fallback, if nothing better exists. @@ -902,15 +925,9 @@ static void start_hrvtime(void) #define hrvtime_is_started() 1 #define start_hrvtime() do{}while(0) #define stop_hrvtime() do{}while(0) +#define get_hrvtime() fallback_get_hrvtime() -static double get_hrvtime(void) -{ - unsigned long ms_user; - elapsed_time_both(&ms_user, NULL, NULL, NULL); - return (double)ms_user; -} - -#endif /* hrvtime support */ +#endif /* !USE_PERFCTR */ BIF_RETTYPE hipe_bifs_get_hrvtime_0(BIF_ALIST_0) { @@ -918,11 +935,8 @@ BIF_RETTYPE hipe_bifs_get_hrvtime_0(BIF_ALIST_0) Eterm res; FloatDef f; - if (!hrvtime_is_started()) { + if (!hrvtime_is_started()) start_hrvtime(); - if (!hrvtime_is_started()) - BIF_RET(NIL); /* arity 0 BIFs may not fail */ - } f.fd = get_hrvtime(); hp = HAlloc(BIF_P, FLOAT_SIZE_OBJECT); res = make_float(hp); |