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authorAndreas Hansson <andreas.hansson@arm.com>2012-09-14 12:13:21 -0400
committerAndreas Hansson <andreas.hansson@arm.com>2012-09-14 12:13:21 -0400
commita57eda0843b886526e0fdd8364373ac49457d20c (patch)
treecabec39d3a6dad185ea17400d1dc2ef9a81db8ec
parent224ea5fba659213a6cc9083a63cee1f6d98e8829 (diff)
downloadgem5-a57eda0843b886526e0fdd8364373ac49457d20c.tar.xz
scons: Add a target for google-perftools profiling
This patch adds a new target called 'perf' that facilitates profiling using google perftools rather than gprof. The perftools CPU profiler offers plenty useful information in addition to gprof, and the latter is kept mostly to offer profiling also on non-Linux hosts.
-rwxr-xr-xsrc/SConscript43
1 files changed, 28 insertions, 15 deletions
diff --git a/src/SConscript b/src/SConscript
index e59e424c3..3e7c4c9e9 100755
--- a/src/SConscript
+++ b/src/SConscript
@@ -933,10 +933,15 @@ def makeEnv(label, objsfx, strip = False, **kwargs):
# Start out with the compiler flags common to all compilers,
# i.e. they all use -g for opt and -g -pg for prof
-ccflags = {'debug' : [], 'opt' : ['-g'], 'fast' : [], 'prof' : ['-g', '-pg']}
+ccflags = {'debug' : [], 'opt' : ['-g'], 'fast' : [], 'prof' : ['-g', '-pg'],
+ 'perf' : ['-g']}
-# Start out with the linker flags common to all linkers, i.e. -pg for prof.
-ldflags = {'debug' : [], 'opt' : [], 'fast' : [], 'prof' : ['-pg']}
+# Start out with the linker flags common to all linkers, i.e. -pg for
+# prof, and -lprofiler for perf. The -lprofile flag is surrounded by
+# no-as-needed and as-needed as the binutils linker is too clever and
+# simply doesn't link to the library otherwise.
+ldflags = {'debug' : [], 'opt' : [], 'fast' : [], 'prof' : ['-pg'],
+ 'perf' : ['-Wl,--no-as-needed', '-lprofiler', '-Wl,--as-needed']}
if env['GCC']:
if sys.platform == 'sunos5':
@@ -944,24 +949,24 @@ if env['GCC']:
else:
ccflags['debug'] += ['-ggdb3']
ldflags['debug'] += ['-O0']
- # opt, fast and prof all share the same cc flags
- for target in ['opt', 'fast', 'prof']:
+ # opt, fast, prof and perf all share the same cc flags
+ for target in ['opt', 'fast', 'prof', 'perf']:
ccflags[target] += ['-O3']
elif env['SUNCC']:
ccflags['debug'] += ['-g0']
ccflags['opt'] += ['-O']
- ccflags['fast'] += ['-fast']
- ccflags['prof'] += ['-fast']
+ for target in ['fast', 'prof', 'perf']:
+ ccflags[target] += ['-fast']
elif env['ICC']:
ccflags['debug'] += ['-g', '-O0']
ccflags['opt'] += ['-O']
- ccflags['fast'] += ['-fast']
- ccflags['prof'] += ['-fast']
+ for target in ['fast', 'prof', 'perf']:
+ ccflags[target] += ['-fast']
elif env['CLANG']:
ccflags['debug'] += ['-g', '-O0']
- ccflags['opt'] += ['-O3']
- ccflags['fast'] += ['-O3']
- ccflags['prof'] += ['-O3']
+ # opt, fast, prof and perf all share the same cc flags
+ for target in ['opt', 'fast', 'prof', 'perf']:
+ ccflags[target] += ['-O3']
else:
print 'Unknown compiler, please fix compiler options'
Exit(1)
@@ -971,8 +976,9 @@ else:
# need. We try to identify the needed environment for each target; if
# we can't, we fall back on instantiating all the environments just to
# be safe.
-target_types = ['debug', 'opt', 'fast', 'prof']
-obj2target = {'do': 'debug', 'o': 'opt', 'fo': 'fast', 'po': 'prof'}
+target_types = ['debug', 'opt', 'fast', 'prof', 'perf']
+obj2target = {'do': 'debug', 'o': 'opt', 'fo': 'fast', 'po': 'prof',
+ 'gpo' : 'perf'}
def identifyTarget(t):
ext = t.split('.')[-1]
@@ -1010,11 +1016,18 @@ if 'fast' in needed_envs:
CPPDEFINES = ['NDEBUG', 'TRACING_ON=0'],
LINKFLAGS = Split(ldflags['fast']))
-# Profiled binary
+# Profiled binary using gprof
if 'prof' in needed_envs:
makeEnv('prof', '.po',
CCFLAGS = Split(ccflags['prof']),
CPPDEFINES = ['NDEBUG', 'TRACING_ON=0'],
LINKFLAGS = Split(ldflags['prof']))
+# Profiled binary using google-pprof
+if 'perf' in needed_envs:
+ makeEnv('perf', '.gpo',
+ CCFLAGS = Split(ccflags['perf']),
+ CPPDEFINES = ['NDEBUG', 'TRACING_ON=0'],
+ LINKFLAGS = Split(ldflags['perf']))
+
Return('envList')