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Bug 1197694 - fflush() rapl output so it always appears immediately. r=erahm.

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--HG--
extra : rebase_source : 2de1c517202616e6daad6e578cfbe89b65cdce0f
This commit is contained in:
Nicholas Nethercote 2015-08-24 15:59:37 -07:00
parent 352ba00f16
commit b7f77af473
1 changed files with 19 additions and 3 deletions
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22
tools/power/rapl.cpp
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@ -76,6 +76,19 @@ CmdLineAbort(const char* aMsg)
// A special value that represents an estimate from an unsupported RAPL domain.
static const double kUnsupported_j = -1.0;
// Print to stdout and flush it, so that the output appears immediately even if
// being redirected through |tee| or anything like that.
static void
PrintAndFlush(const char* aFormat, ...)
{
va_list vargs;
va_start(vargs, aFormat);
vfprintf(stdout, aFormat, vargs);
va_end(vargs);
fflush(stdout);
}
//---------------------------------------------------------------------------
// Mac-specific code
//---------------------------------------------------------------------------
@ -627,8 +640,11 @@ SigprofHandler(int aSigNum, siginfo_t* aInfo, void* aContext)
double total = pkg_J + ram_J;
NormalizeAndPrintAsWatts(totalStr, total);
printf("#%02d %s W = %s (%s + %s + %s) + %s W\n",
sampleNumber++, totalStr, pkgStr, coresStr, gpuStr, otherStr, ramStr);
// Print and flush so that the output appears immediately even if being
// redirected through |tee| or anything like that.
PrintAndFlush("#%02d %s W = %s (%s + %s + %s) + %s W\n",
sampleNumber++, totalStr, pkgStr, coresStr, gpuStr, otherStr,
ramStr);
}
static void
@ -754,7 +770,7 @@ main(int argc, char** argv)
}
// Print header.
printf(" total W = _pkg_ (cores + _gpu_ + other) + _ram_ W\n");
PrintAndFlush(" total W = _pkg_ (cores + _gpu_ + other) + _ram_ W\n");
// Take samples.
if (sampleCount == 0) {