When debugging VMC page fault and ring hang issues, the detailed
process information is quite helpful, especially when the issue
can only be reproduced after a very long time running. With this
information, only run the specific sub-testcase may also will
reproduce the issue, which may save a lot of time for debugging.
With this patch, the process information is similar as following.
When VMC page fault issue happened:
[ 142.978417] amdgpu 0000:00:08.0: [gfxhub] VMC page fault (src_id:0 ring:171
vmid:2 pasid:32769),
[ 142.978542] amdgpu 0000:00:08.0: for process ocltst pid 1354 thread ocltst
pid 1354, args:./ocltst -m oclperf.so -t OCLPerfDeviceEnqueueEvent,
[ 142.978693] amdgpu 0000:00:08.0: in page starting at address
0x0000000000000000 from 27
When ring hang issue happened:
[ 1740.047122] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring comp_1.0.0
timeout, signaled seq=91571, emitted seq=91572
[ 1740.050167] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* The job's process
information is as below:
[ 1740.053160] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process SDMA pid 2098
thread SDMA pid 2098, cmd line:SDMA --mode goldimage_compare --offscreen
--n-swapchain-images 3 --gpu 0 --frontend test_executor --n-test-threads 4
Signed-off-by: Trigger Huang <trigger.hu...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 3 ---
drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 8 ++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 11 +++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 1 +
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 11 ++++++-----
5 files changed, 26 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 1c49b82..1a2d0c9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -235,9 +235,6 @@ static int amdgpu_cs_parser_init(struct amdgpu_cs_parser
*p, union drm_amdgpu_cs
p->job->uf_addr = uf_offset;
kfree(chunk_array);
- /* Use this opportunity to fill in task info for the vm */
- amdgpu_vm_set_task_info(vm);
-
return 0;
free_all_kdata:
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index e0af44f..c75ecb3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -43,6 +43,14 @@ static void amdgpu_job_timedout(struct drm_sched_job *s_job)
job->base.sched->name, atomic_read(&ring->fence_drv.last_seq),
ring->fence_drv.sync_seq);
+ if (job->vm) {
+ struct amdgpu_task_info *ti = &(job->vm->task_info);
+
+ DRM_ERROR("The job's process information is as below:\n");
+ DRM_ERROR("Process %s, thread %s, cmd line:%s\n",
+ ti->process_name, ti->task_name, ti->cmd_line);
+ }
+
if (amdgpu_device_should_recover_gpu(ring->adev))
amdgpu_device_gpu_recover(ring->adev, job);
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index e73d152..24f3cbd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -30,6 +30,7 @@
#include <linux/idr.h>
#include <drm/drmP.h>
#include <drm/amdgpu_drm.h>
+#include <linux/string_helpers.h>
#include "amdgpu.h"
#include "amdgpu_trace.h"
#include "amdgpu_amdkfd.h"
@@ -3045,6 +3046,8 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct
amdgpu_vm *vm,
goto error_free_root;
vm->pasid = pasid;
+
+ amdgpu_vm_set_task_info(vm);
}
vm->fault_hash = init_fault_hash();
@@ -3223,6 +3226,9 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct
amdgpu_vm *vm)
spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
+
+ kfree(vm->task_info.cmd_line);
+ vm->task_info.cmd_line = NULL;
}
kfree(vm->fault_hash);
@@ -3391,6 +3397,11 @@ void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
vm->task_info.tgid = current->group_leader->pid;
get_task_comm(vm->task_info.process_name,
current->group_leader);
}
+
+ vm->task_info.cmd_line =
+ kstrdup_quotable_cmdline(current, GFP_KERNEL);
+ if (!vm->task_info.cmd_line)
+ DRM_DEBUG_DRIVER("Failed to get cmdline!\n");
}
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index e8dcfd5..9fab787 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -175,6 +175,7 @@ struct amdgpu_vm_pte_funcs {
struct amdgpu_task_info {
char process_name[TASK_COMM_LEN];
char task_name[TASK_COMM_LEN];
+ char *cmd_line;
pid_t pid;
pid_t tgid;
};
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index bacdaef..c3e3558 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -325,11 +325,12 @@ static int gmc_v9_0_process_interrupt(struct
amdgpu_device *adev,
amdgpu_vm_get_task_info(adev, entry->pasid, &task_info);
dev_err(adev->dev,
- "[%s] VMC page fault (src_id:%u ring:%u vmid:%u
pasid:%u, for process %s pid %d thread %s pid %d)\n",
- entry->vmid_src ? "mmhub" : "gfxhub",
- entry->src_id, entry->ring_id, entry->vmid,
- entry->pasid, task_info.process_name, task_info.tgid,
- task_info.task_name, task_info.pid);
+ "[%s] VMC page fault (src_id:%u ring:%u vmid:%u
pasid:%u), ",
+ entry->vmid_src ? "mmhub" : "gfxhub", entry->src_id,
+ entry->ring_id, entry->vmid, entry->pasid);
+ dev_err(adev->dev, "for process %s pid %d thread %s pid %d,
args:%s,",
+ task_info.process_name, task_info.tgid,
+ task_info.task_name, task_info.pid, task_info.cmd_line);
dev_err(adev->dev, " in page starting at address 0x%016llx
from %d\n",
addr, entry->client_id);
if (!amdgpu_sriov_vf(adev))
--
2.7.4
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