MPI_Recv()
En Python :
-objet = comm.recv(source=source, tag=etiquette)
+objet = comm.recv(source=source, tag=etiquette, status=etat)
-objet : une variable ou une partie d’un objet modifiable
objet : une variable ou une partie d’un objet modifiable,
+pour recevoir l’objet désérialisé
source : MPI.ANY_SOURCE (valeur par défaut) ou un rang précis
etiquette : MPI.ANY_TAG (valeur par défaut) ou un nombre précis
etat : None (valeur par défaut) ou objet de type MPI.Status
+
+.count : nombre d’octets reçus
.source : rang de la source des données
.tag : étiquette du transfert
+
+
+Exemple - MPI_Send et MPI_Recv#
+Chaque processus a ses propres variables a et b.
+Le processus 2 envoie la valeur de son a vers
+le processus 0 qui reçoit cette valeur via son b.
+
+En C :
+if (proc == 2) {
+ MPI_Send(&a, 1, MPI_INTEGER, 0, 746, MPI_COMM_WORLD);
+}
+else if (proc == 0) {
+ MPI_Recv(&b, 1, MPI_INTEGER, 2, 746, MPI_COMM_WORLD, &etat);
+}
+
+
+En Python :
+if proc == 2:
+ MPI.COMM_WORLD.send(a, dest=0, tag=746)
+elif proc == 0:
+ b = MPI.COMM_WORLD.recv(source=2, tag=746)
+
+
+
+
+Exercice #2 - Envoi d’une matrice#
+Votre objectif : envoyer une matrice 4x4 du processus 0 au processus 1 :
+
+Dans le dossier exercices, éditez le fichier send_matrix.c
+(ou .py) pour programmer le transfert de la matrice
Compilez le code et lancez-le avec deux (2) processus
+
@@ -457,6 +504,24 @@ MPI_Recv()
@@ -474,7 +539,11 @@ MPI_Recv()
diff --git a/99-references.html b/99-references.html
index a60fd8c..0f1f969 100644
--- a/99-references.html
+++ b/99-references.html
@@ -62,7 +62,7 @@
-
+
@@ -180,6 +180,7 @@
@@ -458,12 +459,12 @@ Références
diff --git a/_images/mpi_point2point.svg b/_images/mpi_point2point.svg
new file mode 100644
index 0000000..2922e4d
--- /dev/null
+++ b/_images/mpi_point2point.svg
@@ -0,0 +1,76 @@
+
diff --git a/_sources/3-point-a-point.ipynb b/_sources/3-point-a-point.ipynb
index 3a5ee14..65510a6 100644
--- a/_sources/3-point-a-point.ipynb
+++ b/_sources/3-point-a-point.ipynb
@@ -86,16 +86,71 @@
"En Python :\n",
"\n",
"```Python\n",
- "objet = comm.recv(source=source, tag=etiquette)\n",
+ "objet = comm.recv(source=source, tag=etiquette, status=etat)\n",
"```\n",
"\n",
- "* `objet` : une variable ou une partie d'un objet modifiable"
+ "* `objet` : une variable ou une partie d'un objet modifiable,\n",
+ " pour recevoir l'objet désérialisé\n",
+ "* `source` : `MPI.ANY_SOURCE` (valeur par défaut) ou un rang précis\n",
+ "* `etiquette` : `MPI.ANY_TAG` (valeur par défaut) ou un nombre précis\n",
+ "* `etat` : `None` (valeur par défaut) ou objet de type `MPI.Status`\n",
+ " * `.count` : nombre d’octets reçus\n",
+ " * `.source` : rang de la source des données\n",
+ " * `.tag` : étiquette du transfert"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "id": "4a1c07b9-27f7-4f96-a73c-36d5bef57e88",
+ "metadata": {},
+ "source": [
+ "### Exemple - `MPI_Send` et `MPI_Recv`\n",
+ "\n",
+ "Chaque processus a ses propres variables `a` et `b`.\n",
+ "Le processus 2 envoie la valeur de son `a` vers\n",
+ "le processus 0 qui reçoit cette valeur via son `b`.\n",
+ "\n",
+ "\n",
+ "\n",
+ "En C :\n",
+ "\n",
+ "```C\n",
+ "if (proc == 2) {\n",
+ " MPI_Send(&a, 1, MPI_INTEGER, 0, 746, MPI_COMM_WORLD);\n",
+ "}\n",
+ "else if (proc == 0) {\n",
+ " MPI_Recv(&b, 1, MPI_INTEGER, 2, 746, MPI_COMM_WORLD, &etat);\n",
+ "}\n",
+ "```\n",
+ "\n",
+ "En Python :\n",
+ "\n",
+ "```Python\n",
+ "if proc == 2:\n",
+ " MPI.COMM_WORLD.send(a, dest=0, tag=746)\n",
+ "elif proc == 0:\n",
+ " b = MPI.COMM_WORLD.recv(source=2, tag=746)\n",
+ "```"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "id": "be4f63de-b409-4d16-99c2-b2a9f6c08426",
+ "metadata": {},
+ "source": [
+ "### Exercice #2 - Envoi d'une matrice\n",
+ "\n",
+ "Votre objectif : envoyer une matrice 4x4 du processus 0 au processus 1 :\n",
+ "\n",
+ "1. Dans le dossier `exercices`, éditez le fichier `send_matrix.c`\n",
+ " (ou `.py`) pour programmer le transfert de la matrice\n",
+ "1. Compilez le code et lancez-le avec deux (2) processus"
]
},
{
"cell_type": "code",
"execution_count": null,
- "id": "7168b32e-6a92-489f-aa8d-a45503944a3f",
+ "id": "4cef0a67-9494-4bd7-98a4-a63d082efc19",
"metadata": {},
"outputs": [],
"source": []
diff --git a/genindex.html b/genindex.html
index 1565403..f53b3ec 100644
--- a/genindex.html
+++ b/genindex.html
@@ -180,6 +180,7 @@
diff --git a/search.html b/search.html
index f35d653..c09fe8c 100644
--- a/search.html
+++ b/search.html
@@ -182,6 +182,7 @@
diff --git a/searchindex.js b/searchindex.js
index f203749..0413061 100644
--- a/searchindex.js
+++ b/searchindex.js
@@ -1 +1 @@
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\ No newline at end of file
En Python :
-objet = comm.recv(source=source, tag=etiquette)
+objet = comm.recv(source=source, tag=etiquette, status=etat)
-
-
objet: une variable ou une partie d’un objet modifiable
+objet: une variable ou une partie d’un objet modifiable, +pour recevoir l’objet désérialisé
+source:MPI.ANY_SOURCE(valeur par défaut) ou un rang précis
+etiquette:MPI.ANY_TAG(valeur par défaut) ou un nombre précis
+
+etat:None(valeur par défaut) ou objet de typeMPI.Status-
+
.count: nombre d’octets reçus
+.source: rang de la source des données
+.tag: étiquette du transfert
+
Exemple - MPI_Send et MPI_Recv#
+Chaque processus a ses propres variables a et b.
+Le processus 2 envoie la valeur de son a vers
+le processus 0 qui reçoit cette valeur via son b.
En C :
+if (proc == 2) {
+ MPI_Send(&a, 1, MPI_INTEGER, 0, 746, MPI_COMM_WORLD);
+}
+else if (proc == 0) {
+ MPI_Recv(&b, 1, MPI_INTEGER, 2, 746, MPI_COMM_WORLD, &etat);
+}
+En Python :
+if proc == 2:
+ MPI.COMM_WORLD.send(a, dest=0, tag=746)
+elif proc == 0:
+ b = MPI.COMM_WORLD.recv(source=2, tag=746)
+Exercice #2 - Envoi d’une matrice#
+Votre objectif : envoyer une matrice 4x4 du processus 0 au processus 1 :
+-
+
Dans le dossier
exercices, éditez le fichiersend_matrix.c+(ou.py) pour programmer le transfert de la matrice
+Compilez le code et lancez-le avec deux (2) processus
+