Bug #3078
closedLes valeurs HK_LFR_CPU_LOAD, HK_LFR_CPU_LOAD_MAX et HK_LFR_CPU_LOAD_AVE sont erronées dans FSW <=3.2.0.18
Description
Contexte :
FSW <= 3.2.0.18
Suite à la correction/modification du calcul du CPU load par Alexis dans FSW >=3.2.0.17, les valeurs apparaissant dans le GSE sont incohérentes i.e. >> 100 (255, 192, ...) or le CPU load devrait être compris entre 0 et 100. La revue du code 3.2.0.18 par inspection confirme cela : Alexis (et Paul avant ça) sont censé renvoyer des valeurs entières entre 0 et 100 (CONST_100 - ival où ival est un entier compris normalement entre 0 et 100).
Il apparait de fait que le bug doit exister depuis le début pour toutes les versions du logiciel mais l'ancienne configuration (<=3.2.0.15) sans la tache de scrubbing faisait que les valeurs du CPU load (déjà fausses) se retrouvaient entre 0 et 100 et cohérentes avec les valeurs relevés pour le budget avec la sortie série (option --cpu-usage-report du FSW).
Autre problème : l'ICD dit bien que ces champs HK sont des unsigned char et qu'il faut leur appliquer une fonction de transfert (bijection de [0,255] vers [0,100]) : c'est ce que font les scripts de validation de Gerald/Vero :
tmp += (
"HK_LFR_CPU_LOAD=" + str(0.392156862745 * tm_ccsds26) + ', ' +
"HK_LFR_CPU_LOAD_MAX=" + str(0.392156862745 * tm_ccsds27) + ', ' +
"HK_LFR_CPU_LOAD_AVE=" + str(0.392156862745 * tm_ccsds28) + ', ')
DONC ce calcul est aussi faux car à priori les valeurs envoyées par Alexis/Paul sont <=100.
CONCLUSION : le calcul des CPU load est faux depuis toujours + il semblerait que Plasson attendent des valeurs 0-255.
Related issues
Updated by Alexis Jeandet over 6 years ago
- Status changed from New to Feedback
- % Done changed from 0 to 100
Ça devrait être corrigé maintenant dans la version 3.2.0.19.
Build associé: https://hephaistos.lpp.polytechnique.fr/teamcity/viewLog.html?buildId=32923&buildTypeId=LfrFlightSoftware_BuildLpp&tab=artifacts
Testé sur un code simple l'utilisation CPU est calculée en prenant TAS2 comme référence.
Les valeurs affichées sont le pourcentage sur 255 et le 0.39 fois cette valeur, puis le tableau correspond à celui généré par la fonction RTEMS rtems_cpu_usage_report:
LFR CPU USAGE=143 55.770000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.461561 | 46.056 0x0A010002 | TAS0 | 0.065323 | 6.518 0x0A010003 | TAS1 | 0.031891 | 3.182 0x0A010004 | TAS2 | 0.440381 | 43.943 0x0A010005 | TAS3 | 0.002996 | 0.298 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002152 ------------------------------------------------------------------------------- LFR CPU USAGE=145 56.550000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.489245 | 48.819 0x0A010002 | TAS0 | 0.044641 | 4.454 0x0A010003 | TAS1 | 0.035004 | 3.492 0x0A010004 | TAS2 | 0.430272 | 42.934 0x0A010005 | TAS3 | 0.002996 | 0.298 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002158 ------------------------------------------------------------------------------- LFR CPU USAGE=168 65.520000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.571098 | 56.986 0x0A010002 | TAS0 | 0.049568 | 4.946 0x0A010003 | TAS1 | 0.038104 | 3.802 0x0A010004 | TAS2 | 0.340399 | 33.966 0x0A010005 | TAS3 | 0.002997 | 0.299 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002166 ------------------------------------------------------------------------------- LFR CPU USAGE=156 60.840000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.503674 | 50.258 0x0A010002 | TAS0 | 0.069928 | 6.977 0x0A010003 | TAS1 | 0.035251 | 3.517 0x0A010004 | TAS2 | 0.390307 | 38.946 0x0A010005 | TAS3 | 0.003005 | 0.299 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002165 ------------------------------------------------------------------------------- LFR CPU USAGE=130 50.700000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.438501 | 43.755 0x0A010002 | TAS0 | 0.028965 | 2.890 0x0A010003 | TAS1 | 0.041286 | 4.119 0x0A010004 | TAS2 | 0.490408 | 48.935 0x0A010005 | TAS3 | 0.002999 | 0.299 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002159 ------------------------------------------------------------------------------- LFR CPU USAGE=114 44.460000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.397555 | 39.669 0x0A010002 | TAS0 | 0.030664 | 3.059 0x0A010003 | TAS1 | 0.020369 | 2.032 0x0A010004 | TAS2 | 0.550575 | 54.938 0x0A010005 | TAS3 | 0.002994 | 0.298 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002157 ------------------------------------------------------------------------------- LFR CPU USAGE=138 53.820000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.488849 | 48.779 0x0A010002 | TAS0 | 0.020492 | 2.044 0x0A010003 | TAS1 | 0.029435 | 2.937 0x0A010004 | TAS2 | 0.460387 | 45.939 0x0A010005 | TAS3 | 0.003006 | 0.299 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002169 ------------------------------------------------------------------------------- LFR CPU USAGE=148 57.720000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.495099 | 49.403 0x0A010002 | TAS0 | 0.052433 | 5.232 0x0A010003 | TAS1 | 0.031210 | 3.114 0x0A010004 | TAS2 | 0.420417 | 41.951 0x0A010005 | TAS3 | 0.002998 | 0.299 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002157 ------------------------------------------------------------------------------- LFR CPU USAGE=86 33.540000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.268533 | 26.797 0x0A010002 | TAS0 | 0.036078 | 3.600 0x0A010003 | TAS1 | 0.033986 | 3.391 0x0A010004 | TAS2 | 0.660564 | 65.919 0x0A010005 | TAS3 | 0.002912 | 0.290 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002073 ------------------------------------------------------------------------------- LFR CPU USAGE=161 62.790000 ------------------------------------------------------------------------------- CPU USAGE BY THREAD ------------+----------------------------------------+---------------+--------- ID | NAME | SECONDS | PERCENT ------------+----------------------------------------+---------------+--------- 0x09010001 | IDLE | 0.545230 | 54.400 0x0A010002 | TAS0 | 0.054946 | 5.482 0x0A010003 | TAS1 | 0.028805 | 2.874 0x0A010004 | TAS2 | 0.370277 | 36.944 0x0A010005 | TAS3 | 0.003001 | 0.299 ------------+----------------------------------------+---------------+--------- TIME SINCE LAST CPU USAGE RESET IN SECONDS: 1.002259 -------------------------------------------------------------------------------
Updated by bruno katra over 6 years ago
- Related to Task #3081: Explication et mise à jour des infos de calcul des cpu load dans SRS, SDD et SUM added
Updated by bruno katra over 6 years ago
- Status changed from Feedback to Closed
Inspection code avec Alexis OK + lancement du FSW OK