Track GPU memory usage on a per process basis and report it through
sysfs.
Signed-off-by: Mukul Joshi <mukul.jo...@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 12 ++++++
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 7 ++++
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 51 ++++++++++++++++++++++--
3 files changed, 66 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index f8fa03a12add..91d4f45730ae 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -39,6 +39,7 @@
#include "kfd_device_queue_manager.h"
#include "kfd_dbgmgr.h"
#include "amdgpu_amdkfd.h"
+#include "amdgpu_object.h"
static long kfd_ioctl(struct file *, unsigned int, unsigned long);
static int kfd_open(struct inode *, struct file *);
@@ -1322,6 +1323,9 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file
*filep,
goto err_free;
}
+ /* Update the VRAM usage count */
+ pdd->vram_usage += args->size;
+
mutex_unlock(&p->mutex);
args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
@@ -1351,6 +1355,7 @@ static int kfd_ioctl_free_memory_of_gpu(struct file
*filep,
void *mem;
struct kfd_dev *dev;
int ret;
+ uint64_t size = 0;
dev = kfd_device_by_id(GET_GPU_ID(args->handle));
if (!dev)
@@ -1372,6 +1377,11 @@ static int kfd_ioctl_free_memory_of_gpu(struct file
*filep,
goto err_unlock;
}
+ if (((struct kgd_mem *)mem)->bo)
+ size = ((struct kgd_mem *)mem)->bo->tbo.mem.size;
+ else
+ pr_debug("BO is NULL\n");
+
ret = amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd,
(struct kgd_mem *)mem);
@@ -1382,6 +1392,8 @@ static int kfd_ioctl_free_memory_of_gpu(struct file
*filep,
kfd_process_device_remove_obj_handle(
pdd, GET_IDR_HANDLE(args->handle));
+ pdd->vram_usage -= size;
+
err_unlock:
mutex_unlock(&p->mutex);
return ret;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 43b888b311c7..e7918fc3cee5 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -616,6 +616,8 @@ enum kfd_pdd_bound {
PDD_BOUND_SUSPENDED,
};
+#define MAX_VRAM_FILENAME_LEN 11
+
/* Data that is per-process-per device. */
struct kfd_process_device {
/*
@@ -658,6 +660,11 @@ struct kfd_process_device {
/* Is this process/pasid bound to this device? (amd_iommu_bind_pasid) */
enum kfd_pdd_bound bound;
+
+ /* VRAM usage */
+ uint64_t vram_usage;
+ struct attribute attr_vram;
+ char vram_filename[MAX_VRAM_FILENAME_LEN];
};
#define qpd_to_pdd(x) container_of(x, struct kfd_process_device, qpd)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index fe0cd49d4ea7..c7f1e5d89bd9 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -79,18 +79,22 @@ static struct kfd_procfs_tree procfs;
static ssize_t kfd_procfs_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
- int val = 0;
-
if (strcmp(attr->name, "pasid") == 0) {
struct kfd_process *p = container_of(attr, struct kfd_process,
attr_pasid);
- val = p->pasid;
+
+ return snprintf(buffer, PAGE_SIZE, "%d\n", p->pasid);
+ } else if (strncmp(attr->name, "vram_", 5) == 0) {
+ struct kfd_process_device *pdd = container_of(attr, struct
kfd_process_device,
+ attr_vram);
+ if (pdd)
+ return snprintf(buffer, PAGE_SIZE, "%llu\n",
pdd->vram_usage);
} else {
pr_err("Invalid attribute");
return -EINVAL;
}
- return snprintf(buffer, PAGE_SIZE, "%d\n", val);
+ return 0;
}
static void kfd_procfs_kobj_release(struct kobject *kobj)
@@ -206,6 +210,34 @@ int kfd_procfs_add_queue(struct queue *q)
return 0;
}
+int kfd_procfs_add_vram_usage(struct kfd_process *p)
+{
+ int ret = 0;
+ struct kfd_process_device *pdd;
+
+ if (!p)
+ return -EINVAL;
+
+ if (!p->kobj)
+ return -EFAULT;
+
+ /* Create proc/<pid>/vram_<gpuid> file for each GPU */
+ list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
+ snprintf(pdd->vram_filename, MAX_VRAM_FILENAME_LEN, "vram_%u",
+ pdd->dev->id);
+ pdd->attr_vram.name = pdd->vram_filename;
+ pdd->attr_vram.mode = KFD_SYSFS_FILE_MODE;
+ sysfs_attr_init(&pdd->attr_vram);
+ ret = sysfs_create_file(p->kobj, &pdd->attr_vram);
+ if (ret)
+ pr_warn("Creating vram usage for gpu id %d failed",
+ (int)pdd->dev->id);
+ }
+
+ return ret;
+}
+
+
void kfd_procfs_del_queue(struct queue *q)
{
if (!q)
@@ -411,6 +443,11 @@ struct kfd_process *kfd_create_process(struct file *filep)
process->kobj);
if (!process->kobj_queues)
pr_warn("Creating KFD proc/queues folder failed");
+
+ ret = kfd_procfs_add_vram_usage(process);
+ if (ret)
+ pr_warn("Creating vram usage file for pid %d failed",
+ (int)process->lead_thread->pid);
}
out:
if (!IS_ERR(process))
@@ -551,6 +588,7 @@ static void kfd_process_wq_release(struct work_struct *work)
{
struct kfd_process *p = container_of(work, struct kfd_process,
release_work);
+ struct kfd_process_device *pdd;
/* Remove the procfs files */
if (p->kobj) {
@@ -558,6 +596,10 @@ static void kfd_process_wq_release(struct work_struct
*work)
kobject_del(p->kobj_queues);
kobject_put(p->kobj_queues);
p->kobj_queues = NULL;
+
+ list_for_each_entry(pdd, &p->per_device_data, per_device_list)
+ sysfs_remove_file(p->kobj, &pdd->attr_vram);
+
kobject_del(p->kobj);
kobject_put(p->kobj);
p->kobj = NULL;
@@ -862,6 +904,7 @@ struct kfd_process_device
*kfd_create_process_device_data(struct kfd_dev *dev,
pdd->bound = PDD_UNBOUND;
pdd->already_dequeued = false;
pdd->runtime_inuse = false;
+ pdd->vram_usage = 0;
list_add(&pdd->per_device_list, &p->per_device_data);
/* Init idr used for memory handle translation */
--
2.17.1
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