[Intel-gfx] [PATCH 4/6] drm/i915: Add bannable context parameter
Mika Kuoppala
mika.kuoppala at linux.intel.com
Tue Nov 15 14:36:34 UTC 2016
Now when driver has per context scoring of 'hanging badness'
and also subsequent hangs during short windows are allowed,
if there is progress made in between, it does not make sense
to expose a ban timing window as a context parameter anymore.
Let the scoring be the sole indicator for ban policy and substitute
ban period context parameter as a boolean to get/set context
bannable property.
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 14 +++-----------
drivers/gpu/drm/i915/i915_gem.c | 10 +---------
drivers/gpu/drm/i915/i915_gem_context.c | 23 ++++++++++++++---------
drivers/gpu/drm/i915/i915_gpu_error.c | 5 +++--
include/uapi/drm/i915_drm.h | 1 +
5 files changed, 22 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6bc9d0b..5af1c38 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -832,6 +832,7 @@ struct drm_i915_error_state {
long jiffies;
pid_t pid;
u32 context;
+ int ban_score;
u32 seqno;
u32 head;
u32 tail;
@@ -891,16 +892,10 @@ struct i915_ctx_hang_stats {
/* This context had batch active when hang was declared */
unsigned batch_active;
- /* Time when this context was last blamed for a GPU reset */
- unsigned long guilty_ts;
-
- /* If the contexts causes a second GPU hang within this time,
- * it is permanently banned from submitting any more work.
- */
- unsigned long ban_period_seconds;
+ bool bannable:1;
/* This context is banned to submit more work */
- bool banned;
+ bool banned:1;
/* Accumulated score of hangs caused by this context */
int ban_score;
@@ -1437,9 +1432,6 @@ struct i915_gpu_error {
#define DRM_I915_STUCK_PERIOD_SEC 24 /* No observed seqno progress */
#define DRM_I915_HUNG_PERIOD_SEC 4 /* No observed seqno nor head progress */
-/* Hang gpu twice in this window and your context gets banned */
-#define DRM_I915_CTX_BAN_PERIOD_SEC 12
-
#define HANGCHECK_STUCK_JIFFIES (DRM_I915_STUCK_PERIOD_SEC * HZ)
#define HANGCHECK_HUNG_JIFFIES (DRM_I915_HUNG_PERIOD_SEC * HZ)
#define HANGCHECK_PERIOD_JIFFIES msecs_to_jiffies(1500)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 42a0f96..40a9e10 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2621,20 +2621,13 @@ void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
static bool i915_context_is_banned(const struct i915_gem_context *ctx)
{
const struct i915_ctx_hang_stats *hs = &ctx->hang_stats;
- unsigned long elapsed;
if (hs->banned)
return true;
- if (!hs->ban_period_seconds)
+ if (!hs->bannable)
return false;
- elapsed = get_seconds() - hs->guilty_ts;
- if (elapsed <= hs->ban_period_seconds) {
- DRM_DEBUG("context hanging too fast, banning!\n");
- return true;
- }
-
if (hs->ban_score >= 40) {
DRM_DEBUG("context hanging too often, banning!\n");
return true;
@@ -2651,7 +2644,6 @@ static void i915_gem_context_mark_guilty(struct i915_gem_context *ctx)
hs->banned = i915_context_is_banned(ctx);
hs->batch_active++;
- hs->guilty_ts = get_seconds();
}
static void i915_gem_context_mark_innocent(struct i915_gem_context *ctx)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 958a526..9abaae4 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -331,7 +331,7 @@ __create_hw_context(struct drm_device *dev,
* is no remap info, it will be a NOP. */
ctx->remap_slice = ALL_L3_SLICES(dev_priv);
- ctx->hang_stats.ban_period_seconds = DRM_I915_CTX_BAN_PERIOD_SEC;
+ ctx->hang_stats.bannable = true;
ctx->ring_size = 4 * PAGE_SIZE;
ctx->desc_template = GEN8_CTX_ADDRESSING_MODE(dev_priv) <<
GEN8_CTX_ADDRESSING_MODE_SHIFT;
@@ -1085,7 +1085,7 @@ int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
args->size = 0;
switch (args->param) {
case I915_CONTEXT_PARAM_BAN_PERIOD:
- args->value = ctx->hang_stats.ban_period_seconds;
+ ret = -EINVAL;
break;
case I915_CONTEXT_PARAM_NO_ZEROMAP:
args->value = ctx->flags & CONTEXT_NO_ZEROMAP;
@@ -1101,6 +1101,9 @@ int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
args->value = !!(ctx->flags & CONTEXT_NO_ERROR_CAPTURE);
break;
+ case I915_CONTEXT_PARAM_BANNABLE:
+ args->value = ctx->hang_stats.bannable;
+ break;
default:
ret = -EINVAL;
break;
@@ -1130,13 +1133,7 @@ int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
switch (args->param) {
case I915_CONTEXT_PARAM_BAN_PERIOD:
- if (args->size)
- ret = -EINVAL;
- else if (args->value < ctx->hang_stats.ban_period_seconds &&
- !capable(CAP_SYS_ADMIN))
- ret = -EPERM;
- else
- ctx->hang_stats.ban_period_seconds = args->value;
+ ret = -EINVAL;
break;
case I915_CONTEXT_PARAM_NO_ZEROMAP:
if (args->size) {
@@ -1156,6 +1153,14 @@ int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
ctx->flags &= ~CONTEXT_NO_ERROR_CAPTURE;
}
break;
+ case I915_CONTEXT_PARAM_BANNABLE:
+ if (args->size)
+ ret = -EINVAL;
+ else if (!capable(CAP_SYS_ADMIN))
+ ret = -EPERM;
+ else
+ ctx->hang_stats.bannable = args->value;
+ break;
default:
ret = -EINVAL;
break;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 8d0f2bc..5d2e233 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -352,8 +352,8 @@ static void error_print_request(struct drm_i915_error_state_buf *m,
if (!erq->seqno)
return;
- err_printf(m, "%s pid %d, seqno %8x:%08x, emitted %dms ago, head %08x, tail %08x\n",
- prefix, erq->pid,
+ err_printf(m, "%s pid %d, ban score %d, seqno %8x:%08x, emitted %dms ago, head %08x, tail %08x\n",
+ prefix, erq->pid, erq->ban_score,
erq->context, erq->seqno,
jiffies_to_msecs(jiffies - erq->jiffies),
erq->head, erq->tail);
@@ -1168,6 +1168,7 @@ static void record_request(struct drm_i915_gem_request *request,
struct drm_i915_error_request *erq)
{
erq->context = request->ctx->hw_id;
+ erq->ban_score = request->ctx->hang_stats.ban_score;
erq->seqno = request->global_seqno;
erq->jiffies = request->emitted_jiffies;
erq->head = request->head;
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 1c12a35..12003f0 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1224,6 +1224,7 @@ struct drm_i915_gem_context_param {
#define I915_CONTEXT_PARAM_NO_ZEROMAP 0x2
#define I915_CONTEXT_PARAM_GTT_SIZE 0x3
#define I915_CONTEXT_PARAM_NO_ERROR_CAPTURE 0x4
+#define I915_CONTEXT_PARAM_BANNABLE 0x5
__u64 value;
};
--
2.7.4
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