From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Subject: [Intel-gfx] [PATCH 9/9] drm/i915: Prefer software tracked context busyness
Date: Tue, 19 Jan 2021 12:10:17 +0000 [thread overview]
Message-ID: <20210119121017.6888-9-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <20210119121017.6888-1-chris@chris-wilson.co.uk>
From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
When available prefer context tracked context busyness because it provides
visibility into currently executing contexts as well.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drm_client.c | 64 ++++++++++++++++++++++++--
1 file changed, 59 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
index 5b94d2dcfa4c..ee9732ccd3c2 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.c
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -96,6 +96,58 @@ show_client_busy(struct device *kdev, struct device_attribute *attr, char *buf)
return snprintf(buf, PAGE_SIZE, "%llu\n", total);
}
+static u64 sw_busy_add(struct i915_gem_context *ctx, unsigned int class)
+{
+ struct i915_gem_engines *engines = rcu_dereference(ctx->engines);
+ u32 period_ns = ctx->i915->gt.clock_period_ns;
+ struct i915_gem_engines_iter it;
+ struct intel_context *ce;
+ u64 total = 0;
+
+ for_each_gem_engine(ce, engines, it) {
+ struct intel_context_stats *stats;
+ unsigned int seq;
+ u64 t;
+
+ if (ce->engine->uabi_class != class)
+ continue;
+
+ stats = &ce->stats;
+
+ do {
+ seq = read_seqbegin(&stats->lock);
+ t = ce->stats.runtime.total * period_ns;
+ t += __intel_context_get_active_time(ce);
+ } while (read_seqretry(&stats->lock, seq));
+
+ total += t;
+ }
+
+ return total;
+}
+
+static ssize_t
+show_client_sw_busy(struct device *kdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i915_engine_busy_attribute *i915_attr =
+ container_of(attr, typeof(*i915_attr), attr);
+ unsigned int class = i915_attr->engine_class;
+ struct i915_drm_client *client = i915_attr->client;
+ const u32 period_ns = client->clients->i915->gt.clock_period_ns;
+ u64 total = atomic64_read(&client->past_runtime[class]) * period_ns;
+ struct list_head *list = &client->ctx_list;
+ struct i915_gem_context *ctx;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ctx, list, client_link)
+ total += sw_busy_add(ctx, class);
+ rcu_read_unlock();
+
+ return snprintf(buf, PAGE_SIZE, "%llu\n", total);
+}
+
static const char * const uabi_class_names[] = {
[I915_ENGINE_CLASS_RENDER] = "0",
[I915_ENGINE_CLASS_COPY] = "1",
@@ -106,6 +158,8 @@ static const char * const uabi_class_names[] = {
static int __client_register_sysfs_busy(struct i915_drm_client *client)
{
struct i915_drm_clients *clients = client->clients;
+ bool sw_stats = clients->i915->caps.scheduler &
+ I915_SCHEDULER_CAP_ENGINE_BUSY_STATS;
unsigned int i;
int ret = 0;
@@ -131,18 +185,18 @@ static int __client_register_sysfs_busy(struct i915_drm_client *client)
attr->attr.name = uabi_class_names[i];
attr->attr.mode = 0444;
- attr->show = show_client_busy;
+ attr->show = sw_stats ? show_client_sw_busy : show_client_busy;
ret = sysfs_create_file(client->busy_root,
(struct attribute *)attr);
if (ret)
- goto err;
+ goto out;
}
- return 0;
+out:
+ if (ret)
+ kobject_put(client->busy_root);
-err:
- kobject_put(client->busy_root);
return ret;
}
--
2.20.1
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next prev parent reply other threads:[~2021-01-19 12:10 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 12:10 [Intel-gfx] [PATCH 1/9] drm/i915/gt: Show the per-engine runtime in sysfs Chris Wilson
2021-01-19 12:10 ` [Intel-gfx] [PATCH 2/9] drm/i915: Expose list of clients " Chris Wilson
2021-01-19 13:58 ` [Intel-gfx] [PATCH v2] " Chris Wilson
2021-01-19 12:10 ` [Intel-gfx] [PATCH 3/9] drm/i915: Update client name on context create Chris Wilson
2021-01-19 12:10 ` [Intel-gfx] [PATCH 4/9] drm/i915: Make GEM contexts track DRM clients Chris Wilson
2021-01-19 12:10 ` [Intel-gfx] [PATCH 5/9] drm/i915: Track runtime spent in closed and unreachable GEM contexts Chris Wilson
2021-01-19 12:10 ` [Intel-gfx] [PATCH 6/9] drm/i915: Track all user contexts per client Chris Wilson
2021-01-19 12:10 ` [Intel-gfx] [PATCH 7/9] drm/i915: Expose per-engine client busyness Chris Wilson
2021-01-19 12:10 ` [Intel-gfx] [PATCH 8/9] drm/i915: Track context current active time Chris Wilson
2021-01-19 12:10 ` Chris Wilson [this message]
2021-01-19 20:00 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for series starting with [1/9] drm/i915/gt: Show the per-engine runtime in sysfs (rev2) Patchwork
-- strict thread matches above, loose matches on Subject: below --
2020-09-14 13:12 [Intel-gfx] [PATCH 0/9] Per client engine busyness Tvrtko Ursulin
2020-09-14 13:12 ` [Intel-gfx] [PATCH 9/9] drm/i915: Prefer software tracked context busyness Tvrtko Ursulin
2020-09-04 12:59 [Intel-gfx] [PATCH 0/9] Per client engine busyness Tvrtko Ursulin
2020-09-04 12:59 ` [Intel-gfx] [PATCH 9/9] drm/i915: Prefer software tracked context busyness Tvrtko Ursulin
2020-04-15 10:11 [Intel-gfx] [PATCH 0/9] Per client engine busyness Tvrtko Ursulin
2020-04-15 10:11 ` [Intel-gfx] [PATCH 9/9] drm/i915: Prefer software tracked context busyness Tvrtko Ursulin
2020-03-18 11:01 [Intel-gfx] [PATCH 0/9] Per client engine busyness Tvrtko Ursulin
2020-03-18 11:01 ` [Intel-gfx] [PATCH 9/9] drm/i915: Prefer software tracked context busyness Tvrtko Ursulin
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