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Scaling tweaks (#9653)

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* refactor: update throttling factor calculation and add unit tests for scaling behavior

* refactor: adjust throttling factor calculation for improved accuracy in different configurations

* Update src/mesh/Default.h

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/mesh/Default.h

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* refactor: enhance throttling factor calculation and introduce pow_of_2 utility function

* refactor: improve expected ms calculation in unit tests for Default::getConfiguredOrDefaultMsScaled

* refactor: improve scaling logic for routers and sensors in computeExpectedMs function

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Tom
2026-03-04 05:59:42 -06:00
committed by GitHub
co-authored by GitHub Ben Meadors Copilot
parent 153ab81a9f
commit b7bf251798
4 changed files with 134 additions and 20 deletions
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src/mesh/Default.h
+18 -14
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@@ -1,5 +1,8 @@
#pragma once
#include <MeshRadio.h>
#include <NodeDB.h>
#include <RadioInterface.h>
#include <cmath>
#include <cstdint>
#include <meshUtils.h>
#define ONE_DAY 24 * 60 * 60
@@ -63,25 +66,26 @@ class Default
if (numOnlineNodes <= 40) {
return 1.0;
} else {
float throttlingFactor = 0.075;
if (config.lora.use_preset && config.lora.modem_preset == meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_SLOW)
throttlingFactor = 0.04;
else if (config.lora.use_preset && config.lora.modem_preset == meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST)
throttlingFactor = 0.02;
else if (config.lora.use_preset &&
IS_ONE_OF(config.lora.modem_preset, meshtastic_Config_LoRaConfig_ModemPreset_SHORT_FAST,
meshtastic_Config_LoRaConfig_ModemPreset_SHORT_TURBO,
meshtastic_Config_LoRaConfig_ModemPreset_SHORT_SLOW))
throttlingFactor = 0.01;
// Get bandwidth in kHz - convert from code if not using preset
float bwKHz =
config.lora.use_preset ? modemPresetToBwKHz(config.lora.modem_preset, false) : bwCodeToKHz(config.lora.bandwidth);
// throttlingFactor = 2^SF / (BW_in_kHz * scaling_divisor)
// With scaling_divisor=100:
// In SF11 and BW=250khz (longfast), this gives 0.08192 rather than the original 0.075
// In SF10 and BW=250khz (mediumslow), this gives 0.04096 rather than the original 0.04
// In SF9 and BW=250khz (mediumfast), this gives 0.02048 rather than the original 0.02
// In SF7 and BW=250khz (shortfast), this gives 0.00512 rather than the original 0.01
float throttlingFactor = static_cast<float>(pow_of_2(config.lora.spread_factor)) / (bwKHz * 100.0f);
#if USERPREFS_EVENT_MODE
// If we are in event mode, scale down the throttling factor
throttlingFactor = 0.04;
// If we are in event mode, scale down the throttling factor by 4
throttlingFactor = static_cast<float>(pow_of_2(config.lora.spread_factor)) / (bwKHz * 25.0f);
#endif
// Scaling up traffic based on number of nodes over 40
int nodesOverForty = (numOnlineNodes - 40);
return 1.0 + (nodesOverForty * throttlingFactor); // Each number of online node scales by 0.075 (default)
return 1.0 + (nodesOverForty * throttlingFactor); // Each number of online node scales by throttle factor
}
}
};
};