oprofile at its maximum sampling rate causes a lot of interference.
There is no good automatic way of finding out a non-interfering level as
it basically depends on the workload. Still, we can reduce the impact
somewhat with this patch.
Signed-off-by: Mel Gorman <m...@csn.ul.ie>
---
TLBC/OpCollect.pm | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/TLBC/OpCollect.pm b/TLBC/OpCollect.pm
index c0944bb..6ec477f 100644
--- a/TLBC/OpCollect.pm
+++ b/TLBC/OpCollect.pm
@@ -55,7 +55,7 @@ sub _setup_oprofile()
my $self = shift;
my $vmlinux = shift;
my $refEvents = shift;
- my $cmd = "$Bin/oprofile_start.sh --vmlinux=$vmlinux ";
+ my $cmd = "$Bin/oprofile_start.sh --sample-cycle-factor 6
--sample-event-factor 2 --vmlinux=$vmlinux ";
foreach my $event (@{$refEvents}) {
$cmd .= " --event=$event";
$self->_get_event($event);
--
1.7.1
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