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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2017-10-13 21:26:19 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-10-16 20:44:19 +0100 |
| commit | c5418a8b38a4ff9284e8e59c06a24f443197131c (patch) | |
| tree | 66a1841b60db39e4b12ade89df84bd7c0924bdb6 /drivers/gpu/drm/i915/i915_debugfs.c | |
| parent | drm/i915: Wire up shrinkctl->nr_scanned (diff) | |
| download | linux-dev-c5418a8b38a4ff9284e8e59c06a24f443197131c.tar.xz linux-dev-c5418a8b38a4ff9284e8e59c06a24f443197131c.zip | |
drm/i915: Set our shrinker->batch to 4096 (~16MiB)
Prefer to defer activating our GEM shrinker until we have a few
megabytes to free; or we have accumulated sufficient mempressure by
deferring the reclaim to force a shrink. The intent is that because our
objects may typically be large, we are too effective at shrinking and
are not rewarded for freeing more pages than the batch. It will also
defer the initial shrinking to hopefully put it at a lower priority than
say the buffer cache (although it will balance out over a number of
reclaims, with GEM being more bursty).
v2: Give it a feedback system to try and tune the batch size towards
an effective size for the available objects.
v3: Start keeping track of shrinker stats in debugfs
v4: Protect against finding no shrinkable objects (div-by-zero)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171013202621.7276-7-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 997feddb8436..6d643642e0ce 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -3331,6 +3331,16 @@ static int i915_engine_info(struct seq_file *m, void *unused) return 0; } +static int i915_shrinker_info(struct seq_file *m, void *unused) +{ + struct drm_i915_private *i915 = node_to_i915(m->private); + + seq_printf(m, "seeks = %d\n", i915->mm.shrinker.seeks); + seq_printf(m, "batch = %lu\n", i915->mm.shrinker.batch); + + return 0; +} + static int i915_semaphore_status(struct seq_file *m, void *unused) { struct drm_i915_private *dev_priv = node_to_i915(m->private); @@ -4811,6 +4821,7 @@ static const struct drm_info_list i915_debugfs_list[] = { {"i915_dmc_info", i915_dmc_info, 0}, {"i915_display_info", i915_display_info, 0}, {"i915_engine_info", i915_engine_info, 0}, + {"i915_shrinker_info", i915_shrinker_info, 0}, {"i915_semaphore_status", i915_semaphore_status, 0}, {"i915_shared_dplls_info", i915_shared_dplls_info, 0}, {"i915_dp_mst_info", i915_dp_mst_info, 0}, |