* [PATCH 3/3] drm/amd/amdkfd: Surface files in Sysfs to allow users to get number of compute units that are in use.
@ 2020-09-17 17:11 Ramesh Errabolu
2020-09-19 1:06 ` philip yang
0 siblings, 1 reply; 4+ messages in thread
From: Ramesh Errabolu @ 2020-09-17 17:11 UTC (permalink / raw)
To: amd-gfx; +Cc: Ramesh Errabolu
[Why]
Allow user to know how many compute units (CU) are in use at any given
moment.
[How]
Surface files in Sysfs that allow user to determine the number of compute
units that are in use for a given process. One Sysfs file is used per
device.
Signed-off-by: Ramesh Errabolu <Ramesh.Errabolu@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 28 ++++++-
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 101 +++++++++++++++++++----
2 files changed, 114 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 023629f28495..2ce03586d0dc 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -631,7 +631,7 @@ enum kfd_pdd_bound {
PDD_BOUND_SUSPENDED,
};
-#define MAX_SYSFS_FILENAME_LEN 11
+#define MAX_SYSFS_FILENAME_LEN 32
/*
* SDMA counter runs at 100MHz frequency.
@@ -692,6 +692,32 @@ struct kfd_process_device {
uint64_t sdma_past_activity_counter;
struct attribute attr_sdma;
char sdma_filename[MAX_SYSFS_FILENAME_LEN];
+
+ /*
+ * @cu_occupancy: Reports occupancy of Compute Units (CU) of a process
+ * that is associated with device encoded by "this" struct instance. The
+ * value reflects CU usage by all of the waves launched by this process
+ * on this device. A very important property of occupancy parameter is
+ * that its value is a a snapshot of current use.
+ *
+ * Following is to be noted regarding how this parameter is reported:
+ *
+ * The number of waves that a CU can launch is limited by couple of
+ * parameters. These are encoded by struct amdgpu_cu_info instance
+ * that is part of every device definition. For GFX9 devices this
+ * translates to 40 waves (simd_per_cu * max_waves_per_simd) when waves
+ * do not use scratch memory and 32 waves (max_scratch_slots_per_cu)
+ * when they use. This could change for future devices and therefore
+ * this example should be considered as a guide.
+ *
+ * All CU's of a device are available for the process. This may not be true
+ * under certain conditions - e.g. CU masking.
+ *
+ * Finally number of CU's that are occupied by a process is affected by both
+ * number of CU's a device has along with number of other competing processes
+ */
+ struct attribute attr_cu_occupancy;
+ char cu_occupancy_filename[MAX_SYSFS_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 a0e12a79ab7d..3baffbc828b2 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -249,6 +249,63 @@ static void kfd_sdma_activity_worker(struct work_struct *work)
}
}
+/**
+ * @kfd_get_cu_occupancy() - Collect number of waves in-flight on this device
+ * by current process. Translates acquired wave count into number of compute units
+ * that are occupied.
+ *
+ * @atr: Handle of attribute that allows reporting of wave count. The attribute
+ * handle encapsulates GPU device it is associated with, thereby allowing collection
+ * of waves in flight, etc
+ *
+ * @buffer: Handle of user provided buffer updated with wave count
+ *
+ * Return: Number of bytes written to user buffer or an error value
+ */
+static int kfd_get_cu_occupancy(struct attribute *attr, char *buffer)
+{
+ int cu_cnt;
+ int wave_cnt;
+ int max_waves_per_cu;
+ struct kfd_dev *dev = NULL;
+ struct kfd_process *proc = NULL;
+ struct amdgpu_device *adev = NULL;
+ struct kfd_process_device *pdd = NULL;
+
+ /* Acquire handle of Process-Device-Data associated with attribute */
+ pdd = container_of(attr, struct kfd_process_device, attr_cu_occupancy);
+
+ /*
+ * Acquire handle of Gpu Device associated with attribute. Determine
+ * if ability to collect CU occupancy is defined for this device. If
+ * so acquire the handle of process which encapsulates the PASID of
+ * process. It is possible that the process might have zero work on
+ * device. This is determined by checking if process has any queues
+ * @note: Ability to collect is defined only for Gfx9 devices
+ */
+ cu_cnt = 0;
+ dev = pdd->dev;
+ proc = pdd->process;
+ if (pdd->qpd.queue_count == 0) {
+ pr_info("%s: Gpu-Id: %d has no active queues for process %d\n",
+ __func__, dev->id, proc->pasid);
+ return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt);
+ }
+
+ /* Collect wave count from device by reading relevant registers */
+ wave_cnt = 0;
+ if (dev->kfd2kgd->get_cu_occupancy != NULL)
+ dev->kfd2kgd->get_cu_occupancy(dev->kgd, proc->pasid,
+ &wave_cnt);
+
+ /* Translate wave count to number of compute units */
+ adev = (struct amdgpu_device *)dev->kgd;
+ max_waves_per_cu = adev->gfx.cu_info.simd_per_cu *
+ adev->gfx.cu_info.max_waves_per_simd;
+ cu_cnt = wave_cnt / max_waves_per_cu;
+ return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt);
+}
+
static ssize_t kfd_procfs_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
@@ -279,6 +336,10 @@ static ssize_t kfd_procfs_show(struct kobject *kobj, struct attribute *attr,
return snprintf(buffer, PAGE_SIZE, "%llu\n",
(sdma_activity_work_handler.sdma_activity_counter)/
SDMA_ACTIVITY_DIVISOR);
+
+ /* Sysfs handle that gets CU occupancy is per device */
+ } else if (strncmp(attr->name, "cu_occupancy_", 13) == 0) {
+ return kfd_get_cu_occupancy(attr, buffer);
} else {
pr_err("Invalid attribute");
return -EINVAL;
@@ -432,27 +493,37 @@ static int kfd_procfs_add_sysfs_files(struct kfd_process *p)
* Create sysfs files for each GPU:
* - proc/<pid>/vram_<gpuid>
* - proc/<pid>/sdma_<gpuid>
+ * - proc/<pid>/cu_occupancy_<gpuid>
*/
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
snprintf(pdd->vram_filename, MAX_SYSFS_FILENAME_LEN, "vram_%u",
pdd->dev->id);
- ret = kfd_sysfs_create_file(p, &pdd->attr_vram, pdd->vram_filename);
+ ret = kfd_sysfs_create_file(p, &pdd->attr_vram,
+ pdd->vram_filename);
if (ret)
pr_warn("Creating vram usage for gpu id %d failed",
(int)pdd->dev->id);
-
- snprintf(pdd->sdma_filename, MAX_SYSFS_FILENAME_LEN, "sdma_%u",
- pdd->dev->id);
- ret = kfd_sysfs_create_file(p, &pdd->attr_sdma, pdd->sdma_filename);
- if (ret)
- pr_warn("Creating sdma usage for gpu id %d failed",
- (int)pdd->dev->id);
- }
-
+ if (pdd->dev->kfd2kgd->get_cu_occupancy != NULL) {
+ snprintf(pdd->sdma_filename, MAX_SYSFS_FILENAME_LEN,
+ "sdma_%u", pdd->dev->id);
+ ret = kfd_sysfs_create_file(p, &pdd->attr_sdma,
+ pdd->sdma_filename);
+ if (ret)
+ pr_warn("Creating sdma usage for gpu id %d failed",
+ (int)pdd->dev->id);
+ snprintf(pdd->cu_occupancy_filename,
+ MAX_SYSFS_FILENAME_LEN, "cu_occupancy_%u",
+ pdd->dev->id);
+ ret = kfd_sysfs_create_file(p, &pdd->attr_cu_occupancy,
+ pdd->cu_occupancy_filename);
+ if (ret)
+ pr_warn("Creating CU occupancy file for gpu id %d failed",
+ (int)pdd->dev->id);
+ }
+ }
return ret;
}
-
void kfd_procfs_del_queue(struct queue *q)
{
if (!q)
@@ -767,8 +838,7 @@ static void kfd_process_destroy_pdds(struct kfd_process *p)
amdgpu_amdkfd_gpuvm_release_process_vm(
pdd->dev->kgd, pdd->vm);
fput(pdd->drm_file);
- }
- else if (pdd->vm)
+ } else if (pdd->vm)
amdgpu_amdkfd_gpuvm_destroy_process_vm(
pdd->dev->kgd, pdd->vm);
@@ -815,7 +885,10 @@ static void kfd_process_wq_release(struct work_struct *work)
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
sysfs_remove_file(p->kobj, &pdd->attr_vram);
- sysfs_remove_file(p->kobj, &pdd->attr_sdma);
+ if (pdd->dev->kfd2kgd->get_cu_occupancy != NULL) {
+ sysfs_remove_file(p->kobj, &pdd->attr_sdma);
+ sysfs_remove_file(p->kobj, &pdd->attr_cu_occupancy);
+ }
}
kobject_del(p->kobj);
--
2.27.0
_______________________________________________
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amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 3/3] drm/amd/amdkfd: Surface files in Sysfs to allow users to get number of compute units that are in use.
2020-09-17 17:11 [PATCH 3/3] drm/amd/amdkfd: Surface files in Sysfs to allow users to get number of compute units that are in use Ramesh Errabolu
@ 2020-09-19 1:06 ` philip yang
0 siblings, 0 replies; 4+ messages in thread
From: philip yang @ 2020-09-19 1:06 UTC (permalink / raw)
To: Ramesh Errabolu, amd-gfx
On 2020-09-17 1:11 p.m., Ramesh Errabolu wrote:
> + if (pdd->qpd.queue_count == 0) {
> + pr_info("%s: Gpu-Id: %d has no active queues for process %d\n",
> + __func__, dev->id, proc->pasid);
pr_debug can be dynamically enabled in dmesg if needed, pr_info will
always show in dmesg.
pr_debug("Gpu-Id: %d has no active queues for process %d\n",
dev->id, proc->pasid);
Philip
> + return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt);
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amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [PATCH 3/3] drm/amd/amdkfd: Surface files in Sysfs to allow users to get number of compute units that are in use.
2020-09-25 22:03 Ramesh Errabolu
@ 2020-09-28 10:54 ` Russell, Kent
0 siblings, 0 replies; 4+ messages in thread
From: Russell, Kent @ 2020-09-28 10:54 UTC (permalink / raw)
To: Errabolu, Ramesh, amd-gfx; +Cc: Errabolu, Ramesh
[AMD Public Use]
Some minor things inline
> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> On Behalf Of Ramesh Errabolu
> Sent: Friday, September 25, 2020 6:03 PM
> To: amd-gfx@lists.freedesktop.org
> Cc: Errabolu, Ramesh <Ramesh.Errabolu@amd.com>
> Subject: [PATCH 3/3] drm/amd/amdkfd: Surface files in Sysfs to allow users to get number
> of compute units that are in use.
>
> [Why]
> Allow user to know how many compute units (CU) are in use at any given
> moment.
>
> [How]
> Surface files in Sysfs that allow user to determine the number of compute
> units that are in use for a given process. One Sysfs file is used per
> device.
>
> Signed-off-by: Ramesh Errabolu <Ramesh.Errabolu@amd.com>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 25 +++++++++
> drivers/gpu/drm/amd/amdkfd/kfd_process.c | 68 +++++++++++++++++++++++-
> 2 files changed, 92 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> index 56f92cfff591..3df2b9936458 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> @@ -705,6 +705,31 @@ struct kfd_process_device {
>
> struct kobject *kobj_stats;
> unsigned int doorbell_index;
> +
> + /*
> + * @cu_occupancy: Reports occupancy of Compute Units (CU) of a process
> + * that is associated with device encoded by "this" struct instance. The
> + * value reflects CU usage by all of the waves launched by this process
> + * on this device. A very important property of occupancy parameter is
> + * that its value is a a snapshot of current use.
is a snapshot
> + *
> + * Following is to be noted regarding how this parameter is reported:
> + *
> + * The number of waves that a CU can launch is limited by couple of
> + * parameters. These are encoded by struct amdgpu_cu_info instance
> + * that is part of every device definition. For GFX9 devices this
> + * translates to 40 waves (simd_per_cu * max_waves_per_simd) when waves
> + * do not use scratch memory and 32 waves (max_scratch_slots_per_cu)
> + * when they use. This could change for future devices and therefore
when they do use scratch memory
> + * this example should be considered as a guide.
> + *
> + * All CU's of a device are available for the process. This may not be true
> + * under certain conditions - e.g. CU masking.
> + *
> + * Finally number of CU's that are occupied by a process is affected by both
> + * number of CU's a device has along with number of other competing processes
> + */
> + struct attribute attr_cu_occupancy;
> };
>
> #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 17d909c86f50..26b716b5eb23 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> @@ -249,6 +249,52 @@ static void kfd_sdma_activity_worker(struct work_struct *work)
> }
> }
>
> +/**
> + * @kfd_get_cu_occupancy() - Collect number of waves in-flight on this device
> + * by current process. Translates acquired wave count into number of compute units
> + * that are occupied.
> + *
> + * @atr: Handle of attribute that allows reporting of wave count. The attribute
> + * handle encapsulates GPU device it is associated with, thereby allowing collection
> + * of waves in flight, etc
> + *
> + * @buffer: Handle of user provided buffer updated with wave count
> + *
> + * Return: Number of bytes written to user buffer or an error value
> + */
> +static int kfd_get_cu_occupancy(struct attribute *attr, char *buffer)
> +{
> + int cu_cnt;
> + int wave_cnt;
> + int max_waves_per_cu;
> + struct kfd_dev *dev = NULL;
> + struct kfd_process *proc = NULL;
> + struct kfd_process_device *pdd = NULL;
> +
> + pdd = container_of(attr, struct kfd_process_device, attr_cu_occupancy);
> + dev = pdd->dev;
> + if (dev->kfd2kgd->get_cu_occupancy == NULL)
> + return -EINVAL;
> +
> + cu_cnt = 0;
> + proc = pdd->process;
> + if (pdd->qpd.queue_count == 0) {
> + pr_debug("Gpu-Id: %d has no active queues for process %d\n",
> + dev->id, proc->pasid);
> + return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt);
> + }
> +
> + /* Collect wave count from device if it supports */
> + wave_cnt = 0;
> + max_waves_per_cu = 0;
> + dev->kfd2kgd->get_cu_occupancy(dev->kgd, proc->pasid, &wave_cnt,
> + &max_waves_per_cu);
> +
> + /* Translate wave count to number of compute units */
> + cu_cnt = (wave_cnt + (max_waves_per_cu - 1)) / max_waves_per_cu;
> + return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt);
> +}
> +
> static ssize_t kfd_procfs_show(struct kobject *kobj, struct attribute *attr,
> char *buffer)
> {
> @@ -344,6 +390,7 @@ static ssize_t kfd_procfs_queue_show(struct kobject *kobj,
>
> return 0;
> }
> +
> static ssize_t kfd_procfs_stats_show(struct kobject *kobj,
> struct attribute *attr, char *buffer)
> {
> @@ -359,6 +406,10 @@ static ssize_t kfd_procfs_stats_show(struct kobject *kobj,
> PAGE_SIZE,
> "%llu\n",
> jiffies64_to_msecs(evict_jiffies));
> +
> + /* Sysfs handle that gets CU occupancy is per device */
> + } else if (strcmp(attr->name, "cu_occupancy") == 0) {
> + return kfd_get_cu_occupancy(attr, buffer);
> } else
You should use } else { here, even for a single line, see https://www.kernel.org/doc/html/v4.10/process/coding-style.html right above section 3.1. Annoyingly, checkpatch doesn't catch this.
> pr_err("Invalid attribute");
>
> @@ -466,6 +517,7 @@ static int kfd_procfs_add_sysfs_stats(struct kfd_process *p)
> * Create sysfs files for each GPU:
> * - proc/<pid>/stats_<gpuid>/
> * - proc/<pid>/stats_<gpuid>/evicted_ms
> + * - proc/<pid>/stats_<gpuid>/cu_occupancy
> */
> list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
> struct kobject *kobj_stats;
> @@ -496,6 +548,19 @@ static int kfd_procfs_add_sysfs_stats(struct kfd_process *p)
> if (ret)
> pr_warn("Creating eviction stats for gpuid %d failed",
> (int)pdd->dev->id);
> +
> + /* Add sysfs file to report compute unit occupancy */
> + if (pdd->dev->kfd2kgd->get_cu_occupancy != NULL) {
> + pdd->attr_cu_occupancy.name = "cu_occupancy";
> + pdd->attr_cu_occupancy.mode = KFD_SYSFS_FILE_MODE;
> + sysfs_attr_init(&pdd->attr_cu_occupancy);
> + ret = sysfs_create_file(kobj_stats,
> + &pdd->attr_cu_occupancy);
> + if (ret)
> + pr_warn("Creating %s failed for gpuid: %d",
> + pdd->attr_cu_occupancy.name,
> + (int)pdd->dev->id);
> + }
> }
> err:
> return ret;
> @@ -537,7 +602,6 @@ static int kfd_procfs_add_sysfs_files(struct kfd_process *p)
> return ret;
> }
>
> -
> void kfd_procfs_del_queue(struct queue *q)
> {
> if (!q)
> @@ -909,6 +973,8 @@ static void kfd_process_wq_release(struct work_struct *work)
> sysfs_remove_file(p->kobj, &pdd->attr_vram);
> sysfs_remove_file(p->kobj, &pdd->attr_sdma);
> sysfs_remove_file(p->kobj, &pdd->attr_evict);
> + if (pdd->dev->kfd2kgd->get_cu_occupancy != NULL)
> + sysfs_remove_file(p->kobj, &pdd->attr_cu_occupancy);
> kobject_del(pdd->kobj_stats);
> kobject_put(pdd->kobj_stats);
> pdd->kobj_stats = NULL;
> --
> 2.27.0
>
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> g%2Fmailman%2Flistinfo%2Famd-
> gfx&data=02%7C01%7Ckent.russell%40amd.com%7C4ed773ec69b04a9d2ee308d8619
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^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 3/3] drm/amd/amdkfd: Surface files in Sysfs to allow users to get number of compute units that are in use.
@ 2020-09-25 22:03 Ramesh Errabolu
2020-09-28 10:54 ` Russell, Kent
0 siblings, 1 reply; 4+ messages in thread
From: Ramesh Errabolu @ 2020-09-25 22:03 UTC (permalink / raw)
To: amd-gfx; +Cc: Ramesh Errabolu
[Why]
Allow user to know how many compute units (CU) are in use at any given
moment.
[How]
Surface files in Sysfs that allow user to determine the number of compute
units that are in use for a given process. One Sysfs file is used per
device.
Signed-off-by: Ramesh Errabolu <Ramesh.Errabolu@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 25 +++++++++
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 68 +++++++++++++++++++++++-
2 files changed, 92 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 56f92cfff591..3df2b9936458 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -705,6 +705,31 @@ struct kfd_process_device {
struct kobject *kobj_stats;
unsigned int doorbell_index;
+
+ /*
+ * @cu_occupancy: Reports occupancy of Compute Units (CU) of a process
+ * that is associated with device encoded by "this" struct instance. The
+ * value reflects CU usage by all of the waves launched by this process
+ * on this device. A very important property of occupancy parameter is
+ * that its value is a a snapshot of current use.
+ *
+ * Following is to be noted regarding how this parameter is reported:
+ *
+ * The number of waves that a CU can launch is limited by couple of
+ * parameters. These are encoded by struct amdgpu_cu_info instance
+ * that is part of every device definition. For GFX9 devices this
+ * translates to 40 waves (simd_per_cu * max_waves_per_simd) when waves
+ * do not use scratch memory and 32 waves (max_scratch_slots_per_cu)
+ * when they use. This could change for future devices and therefore
+ * this example should be considered as a guide.
+ *
+ * All CU's of a device are available for the process. This may not be true
+ * under certain conditions - e.g. CU masking.
+ *
+ * Finally number of CU's that are occupied by a process is affected by both
+ * number of CU's a device has along with number of other competing processes
+ */
+ struct attribute attr_cu_occupancy;
};
#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 17d909c86f50..26b716b5eb23 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -249,6 +249,52 @@ static void kfd_sdma_activity_worker(struct work_struct *work)
}
}
+/**
+ * @kfd_get_cu_occupancy() - Collect number of waves in-flight on this device
+ * by current process. Translates acquired wave count into number of compute units
+ * that are occupied.
+ *
+ * @atr: Handle of attribute that allows reporting of wave count. The attribute
+ * handle encapsulates GPU device it is associated with, thereby allowing collection
+ * of waves in flight, etc
+ *
+ * @buffer: Handle of user provided buffer updated with wave count
+ *
+ * Return: Number of bytes written to user buffer or an error value
+ */
+static int kfd_get_cu_occupancy(struct attribute *attr, char *buffer)
+{
+ int cu_cnt;
+ int wave_cnt;
+ int max_waves_per_cu;
+ struct kfd_dev *dev = NULL;
+ struct kfd_process *proc = NULL;
+ struct kfd_process_device *pdd = NULL;
+
+ pdd = container_of(attr, struct kfd_process_device, attr_cu_occupancy);
+ dev = pdd->dev;
+ if (dev->kfd2kgd->get_cu_occupancy == NULL)
+ return -EINVAL;
+
+ cu_cnt = 0;
+ proc = pdd->process;
+ if (pdd->qpd.queue_count == 0) {
+ pr_debug("Gpu-Id: %d has no active queues for process %d\n",
+ dev->id, proc->pasid);
+ return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt);
+ }
+
+ /* Collect wave count from device if it supports */
+ wave_cnt = 0;
+ max_waves_per_cu = 0;
+ dev->kfd2kgd->get_cu_occupancy(dev->kgd, proc->pasid, &wave_cnt,
+ &max_waves_per_cu);
+
+ /* Translate wave count to number of compute units */
+ cu_cnt = (wave_cnt + (max_waves_per_cu - 1)) / max_waves_per_cu;
+ return snprintf(buffer, PAGE_SIZE, "%d\n", cu_cnt);
+}
+
static ssize_t kfd_procfs_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
@@ -344,6 +390,7 @@ static ssize_t kfd_procfs_queue_show(struct kobject *kobj,
return 0;
}
+
static ssize_t kfd_procfs_stats_show(struct kobject *kobj,
struct attribute *attr, char *buffer)
{
@@ -359,6 +406,10 @@ static ssize_t kfd_procfs_stats_show(struct kobject *kobj,
PAGE_SIZE,
"%llu\n",
jiffies64_to_msecs(evict_jiffies));
+
+ /* Sysfs handle that gets CU occupancy is per device */
+ } else if (strcmp(attr->name, "cu_occupancy") == 0) {
+ return kfd_get_cu_occupancy(attr, buffer);
} else
pr_err("Invalid attribute");
@@ -466,6 +517,7 @@ static int kfd_procfs_add_sysfs_stats(struct kfd_process *p)
* Create sysfs files for each GPU:
* - proc/<pid>/stats_<gpuid>/
* - proc/<pid>/stats_<gpuid>/evicted_ms
+ * - proc/<pid>/stats_<gpuid>/cu_occupancy
*/
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
struct kobject *kobj_stats;
@@ -496,6 +548,19 @@ static int kfd_procfs_add_sysfs_stats(struct kfd_process *p)
if (ret)
pr_warn("Creating eviction stats for gpuid %d failed",
(int)pdd->dev->id);
+
+ /* Add sysfs file to report compute unit occupancy */
+ if (pdd->dev->kfd2kgd->get_cu_occupancy != NULL) {
+ pdd->attr_cu_occupancy.name = "cu_occupancy";
+ pdd->attr_cu_occupancy.mode = KFD_SYSFS_FILE_MODE;
+ sysfs_attr_init(&pdd->attr_cu_occupancy);
+ ret = sysfs_create_file(kobj_stats,
+ &pdd->attr_cu_occupancy);
+ if (ret)
+ pr_warn("Creating %s failed for gpuid: %d",
+ pdd->attr_cu_occupancy.name,
+ (int)pdd->dev->id);
+ }
}
err:
return ret;
@@ -537,7 +602,6 @@ static int kfd_procfs_add_sysfs_files(struct kfd_process *p)
return ret;
}
-
void kfd_procfs_del_queue(struct queue *q)
{
if (!q)
@@ -909,6 +973,8 @@ static void kfd_process_wq_release(struct work_struct *work)
sysfs_remove_file(p->kobj, &pdd->attr_vram);
sysfs_remove_file(p->kobj, &pdd->attr_sdma);
sysfs_remove_file(p->kobj, &pdd->attr_evict);
+ if (pdd->dev->kfd2kgd->get_cu_occupancy != NULL)
+ sysfs_remove_file(p->kobj, &pdd->attr_cu_occupancy);
kobject_del(pdd->kobj_stats);
kobject_put(pdd->kobj_stats);
pdd->kobj_stats = NULL;
--
2.27.0
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^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-09-28 10:54 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-17 17:11 [PATCH 3/3] drm/amd/amdkfd: Surface files in Sysfs to allow users to get number of compute units that are in use Ramesh Errabolu
2020-09-19 1:06 ` philip yang
2020-09-25 22:03 Ramesh Errabolu
2020-09-28 10:54 ` Russell, Kent
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