compote: add simple test shader to trigger page faultHEADmaster

Simple shader that write the thread x id to buffer[threadid.x] ie pseudo code:
buffer[threadid.x] = threadid.x;

In the old way the buffer is allocated with regular GPU memory allocation and
everything is pin while in the new way this is simply malloc memory and the GPU
might trigger a page fault if there is no page backing the buffer addresses yet.

Signed-off-by: Jérôme Glisse <jglisse@redhat.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/new.c b/new.c
index f066ad9..cee2f20 100644
--- a/new.c
+++ b/new.c
@@ -32,6 +32,7 @@ int main(int argc, char *argv[])
 {
     compote_context_t *ctx;
     compote_mo_t *mo;
+    void *dst;
     int ret;
 
     ret = compote_context_new(&ctx);
@@ -39,11 +40,18 @@ int main(int argc, char *argv[])
         return ret;
     }
 
-    ret = compote_mo_new(ctx, &mo, 64 << 10);
+    ret = compote_mo_new(ctx, &mo, 32 << 20);
     if (ret) {
         goto out;
     }
 
+    dst = malloc_below40(4 << 20);
+    if (dst == NULL) {
+        ret = -ENOMEM;
+        goto out;
+    }
+    printf("dst addr %p\n", dst);
+
     {
         uint32_t *ptr = mo->ptr;
         uint32_t *sem = &ptr[128 >> 2];
@@ -67,6 +75,10 @@ int main(int argc, char *argv[])
         printf("[%4d] = 0x%08x 0x%08x 0x%08x\n", 128 >> 2, sem[0], sem[1], sem[2]);
     }
 
+    ret = test_compute(ctx, mo->ptr, dst, 1024);
+    if (ret)
+        goto out;
+
     printf("La compote c'est bon !\n");
 
 out: