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Avoid floating point underflow in thermal computation

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This commit is contained in:
Andrea Mazzoleni 2026-07-06 22:04:37 +02:00
parent 7ac780c0ea
commit b017cd53d6
1 changed files with 8 additions and 1 deletions
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9
cmdline/thermal.c
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@ -8,6 +8,7 @@
#include "io.h"
#include <math.h>
#include <float.h>
struct snapraid_thermal* thermal_alloc(uint64_t dev, const char* name)
{
@ -103,7 +104,13 @@ struct snapraid_thermal_params fit_thermal_model(const struct snapraid_thermal_p
}
model.rmse = sqrt(sum_squared_residuals / n_points);
model.r_squared = 1.0 - (sum_squared_residuals / sum_total);
/* avoid sum_total underflow and division by zero */
if (sum_total > FLT_EPSILON) {
model.r_squared = 1.0 - (sum_squared_residuals / sum_total);
} else {
model.r_squared = 1.0;
}
return model;
}