While cpupcstat appeared to have most of the infrastructure necessary to
work out the time spent servicing TLB misses, it does not make the
actual calculation and print it. This patch should cover it.
Signed-off-by: Mel Gorman <m...@csn.ul.ie>
---
cpupcstat | 34 +++++++++++++++++++++++++++-------
1 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/cpupcstat b/cpupcstat
index 951ae05..eee4ed2 100755
--- a/cpupcstat
+++ b/cpupcstat
@@ -39,6 +39,17 @@ my $miss_scale = 0;
my $ins_scale = 0;
my $cyc_scale = 0;
+sub calc_tlbmiss_cost()
+{
+ my $cost_script = `which tlbmiss_cost.sh`;
+ if ($cost_script eq "") {
+ $cost_script = "$Bin/contrib/tlbmiss_cost.sh";
+ }
+ my $data = `$cost_script --vmlinux $vmlinux`;
+ ($data,$cost_in_cycles) = split(/\=/, $data);
+ chomp($cost_in_cycles);
+}
+
sub start_target()
{
my $pid = fork();
@@ -165,6 +176,17 @@ sub run_profile()
($cyc_new * $cyc_scale) / ($new * $miss_scale));
}
$cyc_prev = $ret;
+ } elsif ($service) {
+
+ $ret = $collector->get_current_eventcount($binName,
+ "timer");
+ $cyc_new = $ret - $cyc_prev;
+ my $miss_cycles = $new * $cost_in_cycles * $miss_scale;
+ my $total_cycles = $cyc_new * $cyc_scale;
+
+ printf "%24.4f%%\n", $miss_cycles * 100/$total_cycles;
+
+ $cyc_prev = $ret;
} else {
print("\n");
}
@@ -271,6 +293,10 @@ if ($target) {
chomp($target);
}
+if ($service) {
+ calc_tlbmiss_cost();
+}
+
$misses = 0;
$kern_misses = 0;
run_profile();
@@ -294,13 +320,7 @@ if ($misses > 0) {
if ($service && $cycles > 0) {
if ($cost_in_cycles <= 0) {
- my $cost_script = `which tlbmiss_cost.sh`;
- if ($cost_script eq "") {
- $cost_script = "$Bin/contrib/tlbmiss_cost.sh";
- }
- my $data = `$cost_script --vmlinux $vmlinux`;
- ($data,$cost_in_cycles) = split(/\=/, $data);
- chomp($cost_in_cycles);
+ calc_tlbmiss_cost();
}
my $total_cost = $cost_in_cycles * $misses;
print("$target spent ",
--
1.7.1
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