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base: Fix squares of stats

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If a sample V, which has a square(V) = V * V, was seen N times, then
its sum of squares is given by N * square(V).

Change-Id: Ie3fe0e4afe6e79ba4c8a5a56532f9346f79b4029
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25184
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>
This commit is contained in:
Daniel R. Carvalho
2020-02-08 12:38:02 +01:00
committed by Daniel Carvalho
parent cc2732d5c3
commit f5e84a5fb9
1 changed files with 4 additions and 6 deletions
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10
src/base/statistics.hh
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@@ -1724,9 +1724,8 @@ class SampleStor
void
sample(Counter val, int number)
{
Counter value = val * number;
sum += value;
squares += value * value;
sum += val * number;
squares += val * val * number;
samples += number;
}
@@ -1801,9 +1800,8 @@ class AvgSampleStor
void
sample(Counter val, int number)
{
Counter value = val * number;
sum += value;
squares += value * value;
sum += val * number;
squares += val * val * number;
}
/**