radeonsi: use thread_context::bytes_mapped_limit

Limit the amount of "in-flight" mapping to 1/4 of the total RAM.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/2735
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4508>

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 816015d1f822d2c2673f0155ed4bce81f84e6008..e3ba1c2fb938c1c56242f0cdfbac617480aa5132 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -686,6 +686,7 @@ static struct pipe_context *si_pipe_create_context(struct pipe_screen *screen, v
 {
    struct si_screen *sscreen = (struct si_screen *)screen;
    struct pipe_context *ctx;
+   uint64_t total_ram;
 
    if (sscreen->debug_flags & DBG(CHECK_VM))
       flags |= PIPE_CONTEXT_DEBUG;
@@ -706,9 +707,16 @@ static struct pipe_context *si_pipe_create_context(struct pipe_screen *screen, v
 
    /* Use asynchronous flushes only on amdgpu, since the radeon
     * implementation for fence_server_sync is incomplete. */
-   return threaded_context_create(ctx, &sscreen->pool_transfers, si_replace_buffer_storage,
-                                  sscreen->info.is_amdgpu ? si_create_fence : NULL,
-                                  &((struct si_context *)ctx)->tc);
+   struct pipe_context * tc = threaded_context_create(
+            ctx, &sscreen->pool_transfers, si_replace_buffer_storage,
+            sscreen->info.is_amdgpu ? si_create_fence : NULL,
+            &((struct si_context *)ctx)->tc);
+
+   if (os_get_total_physical_memory(&total_ram)) {
+      ((struct threaded_context *) tc)->bytes_mapped_limit = total_ram / 4;
+   }
+
+   return tc;
 }
 
 /*