A few hash_table users roll their own integer hash functions which
call _mesa_hash_data to perform the hashing which ultimately calls
into XXH32 with a dynamic key length. When using small keys with a
constant size the hash rate can be greatly improved by inlining
XXH32 and providing it a constant key length, see:
https://fastcompression.blogspot.com/2018/03/xxhash-for-small-keys-impressive-power.html
Additionally, this patch removes calls to _mesa_key_hash_string and
makes them instead call _mesa_has_string directly, matching the new
integer hash functions.
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3475>
Our current implementation of performance queries is fairly harsh
because it completely flushes and invalidates the 3d pipeline caches
at the beginning and end of each query. An argument can be made that
this is how performance should be measured but it probably doesn't
reflect what the application is actually doing and the actual cost of
draw calls.
A more appropriate approach is to just stall the pipeline at
scoreboard, so that we measure the effect of a draw call without
having the pipeline in a completely pristine state for every draw
call.
v2: Use end of pipe PIPE_CONTROL instruction for Iris (Ken)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This was initially intended to fix issues with the query timings going
occassionally high.
It turns out there was a bug in the attribution of OA reports to our
context when parsing the OA data. This led to reports flagged with
other context IDs to be included in our queries results.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This is a more accurate description of what happens in processing the
OA reports.
Previously we only had a somewhat difficult to parse state machine
tracking the context ID.
What we really only need to do to decide if the delta between 2
reports (r0 & r1) should be accumulated in the query result is :
* whether the r0 is tagged with the context ID relevant to us
* if r0 is not tagged with our context ID and r1 is: does r0 have a
invalid context id? If not then we're in a case where i915 has
resubmitted the same context for execution through the execlist
submission port
v2: Update comment (Ken)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
If we read the OA reports late enough after the query happens, we can
get a timestamp in the report that is significantly in the past
compared to the start timestamp of the query. The current code must
deal with the wraparound of the timestamp value (every ~6 minute). So
consider that if the difference is greater than half that wraparound
period, we're probably dealing with an old report and make the caller
aware it should read more reports when they're available.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Mark Janes <mark.a.janes@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
We always add an empty buffer in the list when creating the query.
Let's set the len appropriately so that we can recognize it when we
read OA reports up to the end of a query.
We were using an 0 timestamp value associated with the empty buffer
and incorrectly assuming this was a valid value. In turn that led to
not reading enough reports and resulted in deltas added to our counter
values which should have been discarded because those would be flagged
for a different context.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Mark Janes <mark.a.janes@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Accumulation happens between 2 reports, it can be between a start/end
report from another context. So only consider updating the hw_id of
the results when it's not already valid and that we have a valid value
to put in there.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 41b54b5faf ("i965: move OA accumulation code to intel/perf")
Reviewed-by: Mark Janes <mark.a.janes@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
We want to query the content of register configurations from the
kernel. Let's pull this out of the query.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
The Vulkan performance query extension is a bit lower level than the
GL one. Expose some of the functions to do the result accumulation
directly in the Anv driver.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
INTEL_DEBUG=perfmon will iterate over the perf queries, printing
information about the state of each query. Some of this information
will be private to intel/perf, and needs to a dump routine that can be
called from i965.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Now that all references from i965 have been moved to perf, we can make
internal methods private again.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
By encapsulating this implementation within perf, we can eventually
make struct gen_perf_ctx private.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This refactor moves several helper functions for get_query_data as
well:
- accumulate_oa_reports
- read_gt_frequency
- get_pipeline_stats_data
- get_oa_counter_data
Functions which are no longer referenced in brw_performance_query.c
have been removed.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
The following methods have duplicate implementation of read_oa_samples_until in
brw_performance_query.c:
- read_oa_samples_for_query
- read_oa_samples_until
They ar still referenced by other methods in the file and will be
removed on the subsequent commit.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
To move more operations into intel/perf, several state items are
needed. Save references to that state in the perf_ctxt, rather than
passing them in for every operation.
This commit includes an initializer for gen_perf_context, to set those
references and also encapsulate the initialization of the sample
buffer state.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Iris and i965 both need to enumerate the available metrics, so these
routines must be located in perf.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
There were multiple ioctl-wrapper functions, so a common
implementation was put in gen_gem.h. With a common implementation,
perf no longer needs the caller to configure one for it.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This structure contains the configurations of the metrics for the
current platform, and the settings needed for the perf subsystem to
query that configuration from the device. This data is available
without a rendering context, and needed to support MDAPI metrics for
Vulkan.
A gen_perf_context struct will be added later, which holds additional
state from the rendering context necessary for metric data
collection. The gen_perf struct needs a more precise name to reduce
confusion.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
We're currently trying to detect dynamic loading config support by
trying to remove to test config (hard coded in the i915 driver) and
checking we get ENOENT.
This can fail if the test config was updated in Mesa but not yet in
i915.
A better way to do this is to pick an invalid ID and check for ENOENT.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
