In libdrm-amdgpu and amdgpu kernel driver, there are only such priority level:
AMDGPU_CTX_PRIORITY_VERY_LOW,
AMDGPU_CTX_PRIORITY_LOW,
AMDGPU_CTX_PRIORITY_NORMAL,
AMDGPU_CTX_PRIORITY_HIGH,
AMDGPU_CTX_PRIORITY_VERY_HIGH
If priority value is not the one of the above data, the kernel will treat it as invalid.
If you set prority to HIGH or VERY_HIGH, please make sure the process have CAP_SYS_NICE
capability or DRM_MASTER permission.
Signed-off-by: Zhenneng Li <lizhenneng@xxxxxxxxxx>
---
amdgpu/amdgpu_cs.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/amdgpu/amdgpu_cs.c b/amdgpu/amdgpu_cs.c
index eb72c638..d6d768ba 100644
--- a/amdgpu/amdgpu_cs.c
+++ b/amdgpu/amdgpu_cs.c
@@ -57,6 +57,7 @@ drm_public int amdgpu_cs_ctx_create2(amdgpu_device_handle dev,
int i, j, k;
int r;
char *override_priority;
+ int32_t override_prio;
if (!dev || !context)
return -EINVAL;
@@ -66,9 +67,16 @@ drm_public int amdgpu_cs_ctx_create2(amdgpu_device_handle dev,
/* The priority is a signed integer. The variable type is
* wrong. If parsing fails, priority is unchanged.
*/
- if (sscanf(override_priority, "%i", &priority) == 1) {
+ if (sscanf(override_priority, "%i", &override_prio) == 1) {
printf("amdgpu: context priority changed to %i\n",
- priority);
+ override_prio);
+ if (override_prio == 0) {
+ priority = AMDGPU_CTX_PRIORITY_NORMAL;
+ } else if (override_prio < 0) {
+ priority = AMDGPU_CTX_PRIORITY_HIGH;
+ } else {
+ priority = AMDGPU_CTX_PRIORITY_LOW;
+ }
}
}
--
2.34.1
