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android / platform / external / mesa3d / 79ded7cc8f0 / . / src / mesa / drivers / dri / i965 / brw_performance_query.c
blob: f4e62de3b7dd1c66fc447cffd333f62579ba0f67 [file] [log] [blame]
/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* \file brw_performance_query.c
*
* Implementation of the GL_INTEL_performance_query extension.
*
* Currently there are two possible counter sources exposed here:
*
* On Gen6+ hardware we have numerous 64bit Pipeline Statistics Registers
* that we can snapshot at the beginning and end of a query.
*
* On Gen7.5+ we have Observability Architecture counters which are
* covered in separate document from the rest of the PRMs. It is available at:
* https://01.org/linuxgraphics/documentation/driver-documentation-prms
* => 2013 Intel Core Processor Family => Observability Performance Counters
* (This one volume covers Sandybridge, Ivybridge, Baytrail, and Haswell,
* though notably we currently only support OA counters for Haswell+)
*/
#include <limits.h>
/* put before sys/types.h to silence glibc warnings */
#ifdef MAJOR_IN_MKDEV
#include <sys/mkdev.h>
#endif
#ifdef MAJOR_IN_SYSMACROS
#include <sys/sysmacros.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <xf86drm.h>
#include "drm-uapi/i915_drm.h"
#include "main/hash.h"
#include "main/macros.h"
#include "main/mtypes.h"
#include "main/performance_query.h"
#include "util/bitset.h"
#include "util/ralloc.h"
#include "util/hash_table.h"
#include "util/list.h"
#include "util/u_math.h"
#include "brw_context.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"
#include "perf/gen_perf.h"
#include "perf/gen_perf_mdapi.h"
#define FILE_DEBUG_FLAG DEBUG_PERFMON
#define OAREPORT_REASON_MASK 0x3f
#define OAREPORT_REASON_SHIFT 19
#define OAREPORT_REASON_TIMER (1<<0)
#define OAREPORT_REASON_TRIGGER1 (1<<1)
#define OAREPORT_REASON_TRIGGER2 (1<<2)
#define OAREPORT_REASON_CTX_SWITCH (1<<3)
#define OAREPORT_REASON_GO_TRANSITION (1<<4)
struct brw_perf_query_object {
struct gl_perf_query_object base;
struct gen_perf_query_object *query;
};
/** Downcasting convenience macro. */
static inline struct brw_perf_query_object *
brw_perf_query(struct gl_perf_query_object *o)
{
return (struct brw_perf_query_object *) o;
}
#define MI_RPC_BO_SIZE 4096
#define MI_RPC_BO_END_OFFSET_BYTES (MI_RPC_BO_SIZE / 2)
#define MI_FREQ_START_OFFSET_BYTES (3072)
#define MI_FREQ_END_OFFSET_BYTES (3076)
/******************************************************************************/
static bool
brw_is_perf_query_ready(struct gl_context *ctx,
struct gl_perf_query_object *o);
static void
dump_perf_query_callback(GLuint id, void *query_void, void *brw_void)
{
struct gl_context *ctx = brw_void;
struct gl_perf_query_object *o = query_void;
struct brw_perf_query_object * brw_query = brw_perf_query(o);
struct gen_perf_query_object *obj = brw_query->query;
switch (obj->queryinfo->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW:
DBG("%4d: %-6s %-8s BO: %-4s OA data: %-10s %-15s\n",
id,
o->Used ? "Dirty," : "New,",
o->Active ? "Active," : (o->Ready ? "Ready," : "Pending,"),
obj->oa.bo ? "yes," : "no,",
brw_is_perf_query_ready(ctx, o) ? "ready," : "not ready,",
obj->oa.results_accumulated ? "accumulated" : "not accumulated");
break;
case GEN_PERF_QUERY_TYPE_PIPELINE:
DBG("%4d: %-6s %-8s BO: %-4s\n",
id,
o->Used ? "Dirty," : "New,",
o->Active ? "Active," : (o->Ready ? "Ready," : "Pending,"),
obj->pipeline_stats.bo ? "yes" : "no");
break;
default:
unreachable("Unknown query type");
break;
}
}
static void
dump_perf_queries(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
DBG("Queries: (Open queries = %d, OA users = %d)\n",
brw->perf_ctx.n_active_oa_queries, brw->perf_ctx.n_oa_users);
_mesa_HashWalk(ctx->PerfQuery.Objects, dump_perf_query_callback, brw);
}
/**
* Driver hook for glGetPerfQueryInfoINTEL().
*/
static void
brw_get_perf_query_info(struct gl_context *ctx,
unsigned query_index,
const char **name,
GLuint *data_size,
GLuint *n_counters,
GLuint *n_active)
{
struct brw_context *brw = brw_context(ctx);
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
const struct gen_perf_query_info *query =
&perf_ctx->perf->queries[query_index];
*name = query->name;
*data_size = query->data_size;
*n_counters = query->n_counters;
switch (query->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW:
*n_active = perf_ctx->n_active_oa_queries;
break;
case GEN_PERF_QUERY_TYPE_PIPELINE:
*n_active = perf_ctx->n_active_pipeline_stats_queries;
break;
default:
unreachable("Unknown query type");
break;
}
}
static GLuint
gen_counter_type_enum_to_gl_type(enum gen_perf_counter_type type)
{
switch (type) {
case GEN_PERF_COUNTER_TYPE_EVENT: return GL_PERFQUERY_COUNTER_EVENT_INTEL;
case GEN_PERF_COUNTER_TYPE_DURATION_NORM: return GL_PERFQUERY_COUNTER_DURATION_NORM_INTEL;
case GEN_PERF_COUNTER_TYPE_DURATION_RAW: return GL_PERFQUERY_COUNTER_DURATION_RAW_INTEL;
case GEN_PERF_COUNTER_TYPE_THROUGHPUT: return GL_PERFQUERY_COUNTER_THROUGHPUT_INTEL;
case GEN_PERF_COUNTER_TYPE_RAW: return GL_PERFQUERY_COUNTER_RAW_INTEL;
case GEN_PERF_COUNTER_TYPE_TIMESTAMP: return GL_PERFQUERY_COUNTER_TIMESTAMP_INTEL;
default:
unreachable("Unknown counter type");
}
}
static GLuint
gen_counter_data_type_to_gl_type(enum gen_perf_counter_data_type type)
{
switch (type) {
case GEN_PERF_COUNTER_DATA_TYPE_BOOL32: return GL_PERFQUERY_COUNTER_DATA_BOOL32_INTEL;
case GEN_PERF_COUNTER_DATA_TYPE_UINT32: return GL_PERFQUERY_COUNTER_DATA_UINT32_INTEL;
case GEN_PERF_COUNTER_DATA_TYPE_UINT64: return GL_PERFQUERY_COUNTER_DATA_UINT64_INTEL;
case GEN_PERF_COUNTER_DATA_TYPE_FLOAT: return GL_PERFQUERY_COUNTER_DATA_FLOAT_INTEL;
case GEN_PERF_COUNTER_DATA_TYPE_DOUBLE: return GL_PERFQUERY_COUNTER_DATA_DOUBLE_INTEL;
default:
unreachable("Unknown counter data type");
}
}
/**
* Driver hook for glGetPerfCounterInfoINTEL().
*/
static void
brw_get_perf_counter_info(struct gl_context *ctx,
unsigned query_index,
unsigned counter_index,
const char **name,
const char **desc,
GLuint *offset,
GLuint *data_size,
GLuint *type_enum,
GLuint *data_type_enum,
GLuint64 *raw_max)
{
struct brw_context *brw = brw_context(ctx);
const struct gen_perf_query_info *query =
&brw->perf_ctx.perf->queries[query_index];
const struct gen_perf_query_counter *counter =
&query->counters[counter_index];
*name = counter->name;
*desc = counter->desc;
*offset = counter->offset;
*data_size = gen_perf_query_counter_get_size(counter);
*type_enum = gen_counter_type_enum_to_gl_type(counter->type);
*data_type_enum = gen_counter_data_type_to_gl_type(counter->data_type);
*raw_max = counter->raw_max;
}
/**
* Add a query to the global list of "unaccumulated queries."
*
* Queries are tracked here until all the associated OA reports have
* been accumulated via accumulate_oa_reports() after the end
* MI_REPORT_PERF_COUNT has landed in query->oa.bo.
*/
static void
add_to_unaccumulated_query_list(struct brw_context *brw,
struct gen_perf_query_object *obj)
{
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
if (perf_ctx->unaccumulated_elements >=
perf_ctx->unaccumulated_array_size)
{
perf_ctx->unaccumulated_array_size *= 1.5;
perf_ctx->unaccumulated =
reralloc(brw, perf_ctx->unaccumulated,
struct gen_perf_query_object *,
perf_ctx->unaccumulated_array_size);
}
perf_ctx->unaccumulated[perf_ctx->unaccumulated_elements++] = obj;
}
/**
* Remove a query from the global list of unaccumulated queries once
* after successfully accumulating the OA reports associated with the
* query in accumulate_oa_reports() or when discarding unwanted query
* results.
*/
static void
drop_from_unaccumulated_query_list(struct brw_context *brw,
struct gen_perf_query_object *obj)
{
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
for (int i = 0; i < perf_ctx->unaccumulated_elements; i++) {
if (perf_ctx->unaccumulated[i] == obj) {
int last_elt = --perf_ctx->unaccumulated_elements;
if (i == last_elt)
perf_ctx->unaccumulated[i] = NULL;
else {
perf_ctx->unaccumulated[i] =
perf_ctx->unaccumulated[last_elt];
}
break;
}
}
/* Drop our samples_head reference so that associated periodic
* sample data buffers can potentially be reaped if they aren't
* referenced by any other queries...
*/
struct oa_sample_buf *buf =
exec_node_data(struct oa_sample_buf, obj->oa.samples_head, link);
assert(buf->refcount > 0);
buf->refcount--;
obj->oa.samples_head = NULL;
gen_perf_reap_old_sample_buffers(&brw->perf_ctx);
}
static bool
inc_n_oa_users(struct brw_context *brw)
{
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
if (perf_ctx->n_oa_users == 0 &&
drmIoctl(perf_ctx->oa_stream_fd,
I915_PERF_IOCTL_ENABLE, 0) < 0)
{
return false;
}
++perf_ctx->n_oa_users;
return true;
}
static void
dec_n_oa_users(struct brw_context *brw)
{
/* Disabling the i915 perf stream will effectively disable the OA
* counters. Note it's important to be sure there are no outstanding
* MI_RPC commands at this point since they could stall the CS
* indefinitely once OACONTROL is disabled.
*/
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
--perf_ctx->n_oa_users;
if (perf_ctx->n_oa_users == 0 &&
drmIoctl(perf_ctx->oa_stream_fd, I915_PERF_IOCTL_DISABLE, 0) < 0)
{
DBG("WARNING: Error disabling i915 perf stream: %m\n");
}
}
/* In general if we see anything spurious while accumulating results,
* we don't try and continue accumulating the current query, hoping
* for the best, we scrap anything outstanding, and then hope for the
* best with new queries.
*/
static void
discard_all_queries(struct brw_context *brw)
{
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
while (perf_ctx->unaccumulated_elements) {
struct gen_perf_query_object *obj = perf_ctx->unaccumulated[0];
obj->oa.results_accumulated = true;
drop_from_unaccumulated_query_list(brw, perf_ctx->unaccumulated[0]);
dec_n_oa_users(brw);
}
}
enum OaReadStatus {
OA_READ_STATUS_ERROR,
OA_READ_STATUS_UNFINISHED,
OA_READ_STATUS_FINISHED,
};
static enum OaReadStatus
read_oa_samples_until(struct brw_context *brw,
uint32_t start_timestamp,
uint32_t end_timestamp)
{
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
struct exec_node *tail_node =
exec_list_get_tail(&perf_ctx->sample_buffers);
struct oa_sample_buf *tail_buf =
exec_node_data(struct oa_sample_buf, tail_node, link);
uint32_t last_timestamp = tail_buf->last_timestamp;
while (1) {
struct oa_sample_buf *buf = gen_perf_get_free_sample_buf(perf_ctx);
uint32_t offset;
int len;
while ((len = read(perf_ctx->oa_stream_fd, buf->buf,
sizeof(buf->buf))) < 0 && errno == EINTR)
;
if (len <= 0) {
exec_list_push_tail(&perf_ctx->free_sample_buffers, &buf->link);
if (len < 0) {
if (errno == EAGAIN)
return ((last_timestamp - start_timestamp) >=
(end_timestamp - start_timestamp)) ?
OA_READ_STATUS_FINISHED :
OA_READ_STATUS_UNFINISHED;
else {
DBG("Error reading i915 perf samples: %m\n");
}
} else
DBG("Spurious EOF reading i915 perf samples\n");
return OA_READ_STATUS_ERROR;
}
buf->len = len;
exec_list_push_tail(&perf_ctx->sample_buffers, &buf->link);
/* Go through the reports and update the last timestamp. */
offset = 0;
while (offset < buf->len) {
const struct drm_i915_perf_record_header *header =
(const struct drm_i915_perf_record_header *) &buf->buf[offset];
uint32_t *report = (uint32_t *) (header + 1);
if (header->type == DRM_I915_PERF_RECORD_SAMPLE)
last_timestamp = report[1];
offset += header->size;
}
buf->last_timestamp = last_timestamp;
}
unreachable("not reached");
return OA_READ_STATUS_ERROR;
}
/**
* Try to read all the reports until either the delimiting timestamp
* or an error arises.
*/
static bool
read_oa_samples_for_query(struct brw_context *brw,
struct gen_perf_query_object *obj)
{
uint32_t *start;
uint32_t *last;
uint32_t *end;
/* We need the MI_REPORT_PERF_COUNT to land before we can start
* accumulate. */
assert(!brw_batch_references(&brw->batch, obj->oa.bo) &&
!brw_bo_busy(obj->oa.bo));
/* Map the BO once here and let accumulate_oa_reports() unmap
* it. */
if (obj->oa.map == NULL)
obj->oa.map = brw_bo_map(brw, obj->oa.bo, MAP_READ);
start = last = obj->oa.map;
end = obj->oa.map + MI_RPC_BO_END_OFFSET_BYTES;
if (start[0] != obj->oa.begin_report_id) {
DBG("Spurious start report id=%"PRIu32"\n", start[0]);
return true;
}
if (end[0] != (obj->oa.begin_report_id + 1)) {
DBG("Spurious end report id=%"PRIu32"\n", end[0]);
return true;
}
/* Read the reports until the end timestamp. */
switch (read_oa_samples_until(brw, start[1], end[1])) {
case OA_READ_STATUS_ERROR:
/* Fallthrough and let accumulate_oa_reports() deal with the
* error. */
case OA_READ_STATUS_FINISHED:
return true;
case OA_READ_STATUS_UNFINISHED:
return false;
}
unreachable("invalid read status");
return false;
}
/**
* Accumulate raw OA counter values based on deltas between pairs of
* OA reports.
*
* Accumulation starts from the first report captured via
* MI_REPORT_PERF_COUNT (MI_RPC) by brw_begin_perf_query() until the
* last MI_RPC report requested by brw_end_perf_query(). Between these
* two reports there may also some number of periodically sampled OA
* reports collected via the i915 perf interface - depending on the
* duration of the query.
*
* These periodic snapshots help to ensure we handle counter overflow
* correctly by being frequent enough to ensure we don't miss multiple
* overflows of a counter between snapshots. For Gen8+ the i915 perf
* snapshots provide the extra context-switch reports that let us
* subtract out the progress of counters associated with other
* contexts running on the system.
*/
static void
accumulate_oa_reports(struct brw_context *brw,
struct brw_perf_query_object *brw_query)
{
const struct gen_device_info *devinfo = &brw->screen->devinfo;
struct gen_perf_query_object *obj = brw_query->query;
uint32_t *start;
uint32_t *last;
uint32_t *end;
struct exec_node *first_samples_node;
bool in_ctx = true;
int out_duration = 0;
assert(brw_query->base.Ready);
assert(obj->oa.map != NULL);
start = last = obj->oa.map;
end = obj->oa.map + MI_RPC_BO_END_OFFSET_BYTES;
if (start[0] != obj->oa.begin_report_id) {
DBG("Spurious start report id=%"PRIu32"\n", start[0]);
goto error;
}
if (end[0] != (obj->oa.begin_report_id + 1)) {
DBG("Spurious end report id=%"PRIu32"\n", end[0]);
goto error;
}
/* See if we have any periodic reports to accumulate too... */
/* N.B. The oa.samples_head was set when the query began and
* pointed to the tail of the perf_ctx->sample_buffers list at
* the time the query started. Since the buffer existed before the
* first MI_REPORT_PERF_COUNT command was emitted we therefore know
* that no data in this particular node's buffer can possibly be
* associated with the query - so skip ahead one...
*/
first_samples_node = obj->oa.samples_head->next;
foreach_list_typed_from(struct oa_sample_buf, buf, link,
&brw->perf_ctx.sample_buffers,
first_samples_node)
{
int offset = 0;
while (offset < buf->len) {
const struct drm_i915_perf_record_header *header =
(const struct drm_i915_perf_record_header *)(buf->buf + offset);
assert(header->size != 0);
assert(header->size <= buf->len);
offset += header->size;
switch (header->type) {
case DRM_I915_PERF_RECORD_SAMPLE: {
uint32_t *report = (uint32_t *)(header + 1);
bool add = true;
/* Ignore reports that come before the start marker.
* (Note: takes care to allow overflow of 32bit timestamps)
*/
if (gen_device_info_timebase_scale(devinfo,
report[1] - start[1]) > 5000000000) {
continue;
}
/* Ignore reports that come after the end marker.
* (Note: takes care to allow overflow of 32bit timestamps)
*/
if (gen_device_info_timebase_scale(devinfo,
report[1] - end[1]) <= 5000000000) {
goto end;
}
/* For Gen8+ since the counters continue while other
* contexts are running we need to discount any unrelated
* deltas. The hardware automatically generates a report
* on context switch which gives us a new reference point
* to continuing adding deltas from.
*
* For Haswell we can rely on the HW to stop the progress
* of OA counters while any other context is acctive.
*/
if (devinfo->gen >= 8) {
if (in_ctx && report[2] != obj->oa.result.hw_id) {
DBG("i915 perf: Switch AWAY (observed by ID change)\n");
in_ctx = false;
out_duration = 0;
} else if (in_ctx == false && report[2] == obj->oa.result.hw_id) {
DBG("i915 perf: Switch TO\n");
in_ctx = true;
/* From experimentation in IGT, we found that the OA unit
* might label some report as "idle" (using an invalid
* context ID), right after a report for a given context.
* Deltas generated by those reports actually belong to the
* previous context, even though they're not labelled as
* such.
*
* We didn't *really* Switch AWAY in the case that we e.g.
* saw a single periodic report while idle...
*/
if (out_duration >= 1)
add = false;
} else if (in_ctx) {
assert(report[2] == obj->oa.result.hw_id);
DBG("i915 perf: Continuation IN\n");
} else {
assert(report[2] != obj->oa.result.hw_id);
DBG("i915 perf: Continuation OUT\n");
add = false;
out_duration++;
}
}
if (add) {
gen_perf_query_result_accumulate(&obj->oa.result, obj->queryinfo,
last, report);
}
last = report;
break;
}
case DRM_I915_PERF_RECORD_OA_BUFFER_LOST:
DBG("i915 perf: OA error: all reports lost\n");
goto error;
case DRM_I915_PERF_RECORD_OA_REPORT_LOST:
DBG("i915 perf: OA report lost\n");
break;
}
}
}
end:
gen_perf_query_result_accumulate(&obj->oa.result, obj->queryinfo,
last, end);
DBG("Marking %d accumulated - results gathered\n", brw_query->base.Id);
obj->oa.results_accumulated = true;
drop_from_unaccumulated_query_list(brw, obj);
dec_n_oa_users(brw);
return;
error:
discard_all_queries(brw);
}
/******************************************************************************/
static bool
open_i915_perf_oa_stream(struct brw_context *brw,
int metrics_set_id,
int report_format,
int period_exponent,
int drm_fd,
uint32_t ctx_id)
{
uint64_t properties[] = {
/* Single context sampling */
DRM_I915_PERF_PROP_CTX_HANDLE, ctx_id,
/* Include OA reports in samples */
DRM_I915_PERF_PROP_SAMPLE_OA, true,
/* OA unit configuration */
DRM_I915_PERF_PROP_OA_METRICS_SET, metrics_set_id,
DRM_I915_PERF_PROP_OA_FORMAT, report_format,
DRM_I915_PERF_PROP_OA_EXPONENT, period_exponent,
};
struct drm_i915_perf_open_param param = {
.flags = I915_PERF_FLAG_FD_CLOEXEC |
I915_PERF_FLAG_FD_NONBLOCK |
I915_PERF_FLAG_DISABLED,
.num_properties = ARRAY_SIZE(properties) / 2,
.properties_ptr = (uintptr_t) properties,
};
int fd = drmIoctl(drm_fd, DRM_IOCTL_I915_PERF_OPEN, &param);
if (fd == -1) {
DBG("Error opening i915 perf OA stream: %m\n");
return false;
}
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
perf_ctx->oa_stream_fd = fd;
perf_ctx->current_oa_metrics_set_id = metrics_set_id;
perf_ctx->current_oa_format = report_format;
return true;
}
static void
capture_frequency_stat_register(struct brw_context *brw,
struct brw_bo *bo,
uint32_t bo_offset)
{
const struct gen_device_info *devinfo = &brw->screen->devinfo;
if (devinfo->gen >= 7 && devinfo->gen <= 8 &&
!devinfo->is_baytrail && !devinfo->is_cherryview) {
brw_store_register_mem32(brw, bo, GEN7_RPSTAT1, bo_offset);
} else if (devinfo->gen >= 9) {
brw_store_register_mem32(brw, bo, GEN9_RPSTAT0, bo_offset);
}
}
/**
* Driver hook for glBeginPerfQueryINTEL().
*/
static bool
brw_begin_perf_query(struct gl_context *ctx,
struct gl_perf_query_object *o)
{
struct brw_context *brw = brw_context(ctx);
struct brw_perf_query_object *brw_query = brw_perf_query(o);
struct gen_perf_query_object *obj = brw_query->query;
const struct gen_perf_query_info *query = obj->queryinfo;
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
struct gen_perf_config *perf_cfg = perf_ctx->perf;
/* We can assume the frontend hides mistaken attempts to Begin a
* query object multiple times before its End. Similarly if an
* application reuses a query object before results have arrived
* the frontend will wait for prior results so we don't need
* to support abandoning in-flight results.
*/
assert(!o->Active);
assert(!o->Used || o->Ready); /* no in-flight query to worry about */
DBG("Begin(%d)\n", o->Id);
/* XXX: We have to consider that the command parser unit that parses batch
* buffer commands and is used to capture begin/end counter snapshots isn't
* implicitly synchronized with what's currently running across other GPU
* units (such as the EUs running shaders) that the performance counters are
* associated with.
*
* The intention of performance queries is to measure the work associated
* with commands between the begin/end delimiters and so for that to be the
* case we need to explicitly synchronize the parsing of commands to capture
* Begin/End counter snapshots with what's running across other parts of the
* GPU.
*
* When the command parser reaches a Begin marker it effectively needs to
* drain everything currently running on the GPU until the hardware is idle
* before capturing the first snapshot of counters - otherwise the results
* would also be measuring the effects of earlier commands.
*
* When the command parser reaches an End marker it needs to stall until
* everything currently running on the GPU has finished before capturing the
* end snapshot - otherwise the results won't be a complete representation
* of the work.
*
* Theoretically there could be opportunities to minimize how much of the
* GPU pipeline is drained, or that we stall for, when we know what specific
* units the performance counters being queried relate to but we don't
* currently attempt to be clever here.
*
* Note: with our current simple approach here then for back-to-back queries
* we will redundantly emit duplicate commands to synchronize the command
* streamer with the rest of the GPU pipeline, but we assume that in HW the
* second synchronization is effectively a NOOP.
*
* N.B. The final results are based on deltas of counters between (inside)
* Begin/End markers so even though the total wall clock time of the
* workload is stretched by larger pipeline bubbles the bubbles themselves
* are generally invisible to the query results. Whether that's a good or a
* bad thing depends on the use case. For a lower real-time impact while
* capturing metrics then periodic sampling may be a better choice than
* INTEL_performance_query.
*
*
* This is our Begin synchronization point to drain current work on the
* GPU before we capture our first counter snapshot...
*/
perf_cfg->vtbl.emit_mi_flush(brw);
switch (query->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW: {
/* Opening an i915 perf stream implies exclusive access to the OA unit
* which will generate counter reports for a specific counter set with a
* specific layout/format so we can't begin any OA based queries that
* require a different counter set or format unless we get an opportunity
* to close the stream and open a new one...
*/
uint64_t metric_id = gen_perf_query_get_metric_id(perf_ctx->perf, query);
if (perf_ctx->oa_stream_fd != -1 &&
perf_ctx->current_oa_metrics_set_id != metric_id) {
if (perf_ctx->n_oa_users != 0) {
DBG("WARNING: Begin(%d) failed already using perf config=%i/%"PRIu64"\n",
o->Id, perf_ctx->current_oa_metrics_set_id, metric_id);
return false;
} else
gen_perf_close(perf_ctx, query);
}
/* If the OA counters aren't already on, enable them. */
if (perf_ctx->oa_stream_fd == -1) {
__DRIscreen *screen = brw->screen->driScrnPriv;
const struct gen_device_info *devinfo = &brw->screen->devinfo;
/* The period_exponent gives a sampling period as follows:
* sample_period = timestamp_period * 2^(period_exponent + 1)
*
* The timestamps increments every 80ns (HSW), ~52ns (GEN9LP) or
* ~83ns (GEN8/9).
*
* The counter overflow period is derived from the EuActive counter
* which reads a counter that increments by the number of clock
* cycles multiplied by the number of EUs. It can be calculated as:
*
* 2^(number of bits in A counter) / (n_eus * max_gen_freq * 2)
*
* (E.g. 40 EUs @ 1GHz = ~53ms)
*
* We select a sampling period inferior to that overflow period to
* ensure we cannot see more than 1 counter overflow, otherwise we
* could loose information.
*/
int a_counter_in_bits = 32;
if (devinfo->gen >= 8)
a_counter_in_bits = 40;
uint64_t overflow_period = pow(2, a_counter_in_bits) /
(perf_cfg->sys_vars.n_eus *
/* drop 1GHz freq to have units in nanoseconds */
2);
DBG("A counter overflow period: %"PRIu64"ns, %"PRIu64"ms (n_eus=%"PRIu64")\n",
overflow_period, overflow_period / 1000000ul, perf_cfg->sys_vars.n_eus);
int period_exponent = 0;
uint64_t prev_sample_period, next_sample_period;
for (int e = 0; e < 30; e++) {
prev_sample_period = 1000000000ull * pow(2, e + 1) / devinfo->timestamp_frequency;
next_sample_period = 1000000000ull * pow(2, e + 2) / devinfo->timestamp_frequency;
/* Take the previous sampling period, lower than the overflow
* period.
*/
if (prev_sample_period < overflow_period &&
next_sample_period > overflow_period)
period_exponent = e + 1;
}
if (period_exponent == 0) {
DBG("WARNING: enable to find a sampling exponent\n");
return false;
}
DBG("OA sampling exponent: %i ~= %"PRIu64"ms\n", period_exponent,
prev_sample_period / 1000000ul);
if (!open_i915_perf_oa_stream(brw,
metric_id,
query->oa_format,
period_exponent,
screen->fd, /* drm fd */
brw->hw_ctx))
return false;
} else {
assert(perf_ctx->current_oa_metrics_set_id == metric_id &&
perf_ctx->current_oa_format == query->oa_format);
}
if (!inc_n_oa_users(brw)) {
DBG("WARNING: Error enabling i915 perf stream: %m\n");
return false;
}
if (obj->oa.bo) {
perf_cfg->vtbl.bo_unreference(obj->oa.bo);
obj->oa.bo = NULL;
}
obj->oa.bo =
brw->perf_ctx.perf->vtbl.bo_alloc(brw->bufmgr,
"perf. query OA MI_RPC bo",
MI_RPC_BO_SIZE);
#ifdef DEBUG
/* Pre-filling the BO helps debug whether writes landed. */
void *map = brw_bo_map(brw, obj->oa.bo, MAP_WRITE);
memset(map, 0x80, MI_RPC_BO_SIZE);
brw_bo_unmap(obj->oa.bo);
#endif
obj->oa.begin_report_id = perf_ctx->next_query_start_report_id;
perf_ctx->next_query_start_report_id += 2;
/* We flush the batchbuffer here to minimize the chances that MI_RPC
* delimiting commands end up in different batchbuffers. If that's the
* case, the measurement will include the time it takes for the kernel
* scheduler to load a new request into the hardware. This is manifested in
* tools like frameretrace by spikes in the "GPU Core Clocks" counter.
*/
perf_cfg->vtbl.batchbuffer_flush(brw, __FILE__, __LINE__);
/* Take a starting OA counter snapshot. */
perf_cfg->vtbl.emit_mi_report_perf_count(brw, obj->oa.bo, 0,
obj->oa.begin_report_id);
perf_cfg->vtbl.capture_frequency_stat_register(brw, obj->oa.bo,
MI_FREQ_START_OFFSET_BYTES);
++perf_ctx->n_active_oa_queries;
/* No already-buffered samples can possibly be associated with this query
* so create a marker within the list of sample buffers enabling us to
* easily ignore earlier samples when processing this query after
* completion.
*/
assert(!exec_list_is_empty(&perf_ctx->sample_buffers));
obj->oa.samples_head = exec_list_get_tail(&perf_ctx->sample_buffers);
struct oa_sample_buf *buf =
exec_node_data(struct oa_sample_buf, obj->oa.samples_head, link);
/* This reference will ensure that future/following sample
* buffers (that may relate to this query) can't be freed until
* this drops to zero.
*/
buf->refcount++;
gen_perf_query_result_clear(&obj->oa.result);
obj->oa.results_accumulated = false;
add_to_unaccumulated_query_list(brw, obj);
break;
}
case GEN_PERF_QUERY_TYPE_PIPELINE:
if (obj->pipeline_stats.bo) {
brw->perf_ctx.perf->vtbl.bo_unreference(obj->pipeline_stats.bo);
obj->pipeline_stats.bo = NULL;
}
obj->pipeline_stats.bo =
brw->perf_ctx.perf->vtbl.bo_alloc(brw->bufmgr,
"perf. query pipeline stats bo",
STATS_BO_SIZE);
/* Take starting snapshots. */
gen_perf_snapshot_statistics_registers(brw, perf_cfg, obj, 0);
++perf_ctx->n_active_pipeline_stats_queries;
break;
default:
unreachable("Unknown query type");
break;
}
if (INTEL_DEBUG & DEBUG_PERFMON)
dump_perf_queries(brw);
return true;
}
/**
* Driver hook for glEndPerfQueryINTEL().
*/
static void
brw_end_perf_query(struct gl_context *ctx,
struct gl_perf_query_object *o)
{
struct brw_context *brw = brw_context(ctx);
struct brw_perf_query_object *brw_query = brw_perf_query(o);
struct gen_perf_query_object *obj = brw_query->query;
struct gen_perf_config *perf_cfg = brw->perf_ctx.perf;
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
DBG("End(%d)\n", o->Id);
/* Ensure that the work associated with the queried commands will have
* finished before taking our query end counter readings.
*
* For more details see comment in brw_begin_perf_query for
* corresponding flush.
*/
perf_cfg->vtbl.emit_mi_flush(brw);
switch (obj->queryinfo->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW:
/* NB: It's possible that the query will have already been marked
* as 'accumulated' if an error was seen while reading samples
* from perf. In this case we mustn't try and emit a closing
* MI_RPC command in case the OA unit has already been disabled
*/
if (!obj->oa.results_accumulated) {
/* Take an ending OA counter snapshot. */
perf_cfg->vtbl.capture_frequency_stat_register(brw, obj->oa.bo,
MI_FREQ_END_OFFSET_BYTES);
brw->vtbl.emit_mi_report_perf_count(brw, obj->oa.bo,
MI_RPC_BO_END_OFFSET_BYTES,
obj->oa.begin_report_id + 1);
}
--perf_ctx->n_active_oa_queries;
/* NB: even though the query has now ended, it can't be accumulated
* until the end MI_REPORT_PERF_COUNT snapshot has been written
* to query->oa.bo
*/
break;
case GEN_PERF_QUERY_TYPE_PIPELINE:
gen_perf_snapshot_statistics_registers(brw, perf_cfg, obj,
STATS_BO_END_OFFSET_BYTES);
--perf_ctx->n_active_pipeline_stats_queries;
break;
default:
unreachable("Unknown query type");
break;
}
}
static void
brw_wait_perf_query(struct gl_context *ctx, struct gl_perf_query_object *o)
{
struct brw_context *brw = brw_context(ctx);
struct brw_perf_query_object *brw_query = brw_perf_query(o);
struct gen_perf_query_object *obj = brw_query->query;
struct brw_bo *bo = NULL;
struct gen_perf_config *perf_cfg = brw->perf_ctx.perf;
assert(!o->Ready);
switch (obj->queryinfo->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW:
bo = obj->oa.bo;
break;
case GEN_PERF_QUERY_TYPE_PIPELINE:
bo = obj->pipeline_stats.bo;
break;
default:
unreachable("Unknown query type");
break;
}
if (bo == NULL)
return;
/* If the current batch references our results bo then we need to
* flush first...
*/
if (brw_batch_references(&brw->batch, bo))
perf_cfg->vtbl.batchbuffer_flush(brw, __FILE__, __LINE__);
brw_bo_wait_rendering(bo);
/* Due to a race condition between the OA unit signaling report
* availability and the report actually being written into memory,
* we need to wait for all the reports to come in before we can
* read them.
*/
if (obj->queryinfo->kind == GEN_PERF_QUERY_TYPE_OA ||
obj->queryinfo->kind == GEN_PERF_QUERY_TYPE_RAW) {
while (!read_oa_samples_for_query(brw, obj))
;
}
}
static bool
brw_is_perf_query_ready(struct gl_context *ctx,
struct gl_perf_query_object *o)
{
struct brw_context *brw = brw_context(ctx);
struct brw_perf_query_object *brw_query = brw_perf_query(o);
struct gen_perf_query_object *obj = brw_query->query;
if (o->Ready)
return true;
switch (obj->queryinfo->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW:
return (obj->oa.results_accumulated ||
(obj->oa.bo &&
!brw_batch_references(&brw->batch, obj->oa.bo) &&
!brw_bo_busy(obj->oa.bo) &&
read_oa_samples_for_query(brw, obj)));
case GEN_PERF_QUERY_TYPE_PIPELINE:
return (obj->pipeline_stats.bo &&
!brw_batch_references(&brw->batch, obj->pipeline_stats.bo) &&
!brw_bo_busy(obj->pipeline_stats.bo));
default:
unreachable("Unknown query type");
break;
}
return false;
}
static void
read_slice_unslice_frequencies(struct brw_context *brw,
struct gen_perf_query_object *obj)
{
const struct gen_device_info *devinfo = &brw->screen->devinfo;
uint32_t *begin_report = obj->oa.map, *end_report = obj->oa.map + MI_RPC_BO_END_OFFSET_BYTES;
gen_perf_query_result_read_frequencies(&obj->oa.result,
devinfo, begin_report, end_report);
}
static void
read_gt_frequency(struct brw_context *brw,
struct gen_perf_query_object *obj)
{
const struct gen_device_info *devinfo = &brw->screen->devinfo;
uint32_t start = *((uint32_t *)(obj->oa.map + MI_FREQ_START_OFFSET_BYTES)),
end = *((uint32_t *)(obj->oa.map + MI_FREQ_END_OFFSET_BYTES));
switch (devinfo->gen) {
case 7:
case 8:
obj->oa.gt_frequency[0] = GET_FIELD(start, GEN7_RPSTAT1_CURR_GT_FREQ) * 50ULL;
obj->oa.gt_frequency[1] = GET_FIELD(end, GEN7_RPSTAT1_CURR_GT_FREQ) * 50ULL;
break;
case 9:
case 10:
case 11:
obj->oa.gt_frequency[0] = GET_FIELD(start, GEN9_RPSTAT0_CURR_GT_FREQ) * 50ULL / 3ULL;
obj->oa.gt_frequency[1] = GET_FIELD(end, GEN9_RPSTAT0_CURR_GT_FREQ) * 50ULL / 3ULL;
break;
default:
unreachable("unexpected gen");
}
/* Put the numbers into Hz. */
obj->oa.gt_frequency[0] *= 1000000ULL;
obj->oa.gt_frequency[1] *= 1000000ULL;
}
static int
get_oa_counter_data(struct brw_context *brw,
struct gen_perf_query_object *obj,
size_t data_size,
uint8_t *data)
{
struct gen_perf_config *perf = brw->perf_ctx.perf;
const struct gen_perf_query_info *query = obj->queryinfo;
int n_counters = query->n_counters;
int written = 0;
for (int i = 0; i < n_counters; i++) {
const struct gen_perf_query_counter *counter = &query->counters[i];
uint64_t *out_uint64;
float *out_float;
size_t counter_size = gen_perf_query_counter_get_size(counter);
if (counter_size) {
switch (counter->data_type) {
case GEN_PERF_COUNTER_DATA_TYPE_UINT64:
out_uint64 = (uint64_t *)(data + counter->offset);
*out_uint64 =
counter->oa_counter_read_uint64(perf, query,
obj->oa.result.accumulator);
break;
case GEN_PERF_COUNTER_DATA_TYPE_FLOAT:
out_float = (float *)(data + counter->offset);
*out_float =
counter->oa_counter_read_float(perf, query,
obj->oa.result.accumulator);
break;
default:
/* So far we aren't using uint32, double or bool32... */
unreachable("unexpected counter data type");
}
written = counter->offset + counter_size;
}
}
return written;
}
static int
get_pipeline_stats_data(struct brw_context *brw,
struct gen_perf_query_object *obj,
size_t data_size,
uint8_t *data)
{
const struct gen_perf_query_info *query = obj->queryinfo;
int n_counters = obj->queryinfo->n_counters;
uint8_t *p = data;
uint64_t *start = brw_bo_map(brw, obj->pipeline_stats.bo, MAP_READ);
uint64_t *end = start + (STATS_BO_END_OFFSET_BYTES / sizeof(uint64_t));
for (int i = 0; i < n_counters; i++) {
const struct gen_perf_query_counter *counter = &query->counters[i];
uint64_t value = end[i] - start[i];
if (counter->pipeline_stat.numerator !=
counter->pipeline_stat.denominator) {
value *= counter->pipeline_stat.numerator;
value /= counter->pipeline_stat.denominator;
}
*((uint64_t *)p) = value;
p += 8;
}
brw_bo_unmap(obj->pipeline_stats.bo);
return p - data;
}
/**
* Driver hook for glGetPerfQueryDataINTEL().
*/
static void
brw_get_perf_query_data(struct gl_context *ctx,
struct gl_perf_query_object *o,
GLsizei data_size,
GLuint *data,
GLuint *bytes_written)
{
struct brw_context *brw = brw_context(ctx);
struct brw_perf_query_object *brw_query = brw_perf_query(o);
struct gen_perf_query_object *obj = brw_query->query;
int written = 0;
assert(brw_is_perf_query_ready(ctx, o));
DBG("GetData(%d)\n", o->Id);
if (INTEL_DEBUG & DEBUG_PERFMON)
dump_perf_queries(brw);
/* We expect that the frontend only calls this hook when it knows
* that results are available.
*/
assert(o->Ready);
switch (obj->queryinfo->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW:
if (!obj->oa.results_accumulated) {
read_gt_frequency(brw, obj);
read_slice_unslice_frequencies(brw, obj);
accumulate_oa_reports(brw, brw_query);
assert(obj->oa.results_accumulated);
brw_bo_unmap(obj->oa.bo);
obj->oa.map = NULL;
}
if (obj->queryinfo->kind == GEN_PERF_QUERY_TYPE_OA) {
written = get_oa_counter_data(brw, obj, data_size, (uint8_t *)data);
} else {
const struct gen_device_info *devinfo = &brw->screen->devinfo;
written = gen_perf_query_result_write_mdapi((uint8_t *)data, data_size,
devinfo, &obj->oa.result,
obj->oa.gt_frequency[0],
obj->oa.gt_frequency[1]);
}
break;
case GEN_PERF_QUERY_TYPE_PIPELINE:
written = get_pipeline_stats_data(brw, obj, data_size, (uint8_t *)data);
break;
default:
unreachable("Unknown query type");
break;
}
if (bytes_written)
*bytes_written = written;
}
static struct gl_perf_query_object *
brw_new_perf_query_object(struct gl_context *ctx, unsigned query_index)
{
struct brw_context *brw = brw_context(ctx);
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
const struct gen_perf_query_info *queryinfo =
&perf_ctx->perf->queries[query_index];
struct gen_perf_query_object *obj =
calloc(1, sizeof(struct gen_perf_query_object));
if (!obj)
return NULL;
obj->queryinfo = queryinfo;
perf_ctx->n_query_instances++;
struct brw_perf_query_object *brw_query = calloc(1, sizeof(struct brw_perf_query_object));
if (unlikely(!brw_query))
return NULL;
brw_query->query = obj;
return &brw_query->base;
}
/**
* Driver hook for glDeletePerfQueryINTEL().
*/
static void
brw_delete_perf_query(struct gl_context *ctx,
struct gl_perf_query_object *o)
{
struct brw_context *brw = brw_context(ctx);
struct gen_perf_config *perf_cfg = brw->perf_ctx.perf;
struct brw_perf_query_object *brw_query = brw_perf_query(o);
struct gen_perf_query_object *obj = brw_query->query;
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
/* We can assume that the frontend waits for a query to complete
* before ever calling into here, so we don't have to worry about
* deleting an in-flight query object.
*/
assert(!o->Active);
assert(!o->Used || o->Ready);
DBG("Delete(%d)\n", o->Id);
switch (obj->queryinfo->kind) {
case GEN_PERF_QUERY_TYPE_OA:
case GEN_PERF_QUERY_TYPE_RAW:
if (obj->oa.bo) {
if (!obj->oa.results_accumulated) {
drop_from_unaccumulated_query_list(brw, obj);
dec_n_oa_users(brw);
}
perf_cfg->vtbl.bo_unreference(obj->oa.bo);
obj->oa.bo = NULL;
}
obj->oa.results_accumulated = false;
break;
case GEN_PERF_QUERY_TYPE_PIPELINE:
if (obj->pipeline_stats.bo) {
perf_cfg->vtbl.bo_unreference(obj->pipeline_stats.bo);
obj->pipeline_stats.bo = NULL;
}
break;
default:
unreachable("Unknown query type");
break;
}
/* As an indication that the INTEL_performance_query extension is no
* longer in use, it's a good time to free our cache of sample
* buffers and close any current i915-perf stream.
*/
if (--perf_ctx->n_query_instances == 0) {
gen_perf_free_sample_bufs(perf_ctx);
gen_perf_close(perf_ctx, obj->queryinfo);
}
free(obj);
free(brw_query);
}
/******************************************************************************/
static void
init_pipeline_statistic_query_registers(struct brw_context *brw)
{
const struct gen_device_info *devinfo = &brw->screen->devinfo;
struct gen_perf_config *perf = brw->perf_ctx.perf;
struct gen_perf_query_info *query =
gen_perf_query_append_query_info(perf, MAX_STAT_COUNTERS);
query->kind = GEN_PERF_QUERY_TYPE_PIPELINE;
query->name = "Pipeline Statistics Registers";
gen_perf_query_info_add_basic_stat_reg(query, IA_VERTICES_COUNT,
"N vertices submitted");
gen_perf_query_info_add_basic_stat_reg(query, IA_PRIMITIVES_COUNT,
"N primitives submitted");
gen_perf_query_info_add_basic_stat_reg(query, VS_INVOCATION_COUNT,
"N vertex shader invocations");
if (devinfo->gen == 6) {
gen_perf_query_info_add_stat_reg(query, GEN6_SO_PRIM_STORAGE_NEEDED, 1, 1,
"SO_PRIM_STORAGE_NEEDED",
"N geometry shader stream-out primitives (total)");
gen_perf_query_info_add_stat_reg(query, GEN6_SO_NUM_PRIMS_WRITTEN, 1, 1,
"SO_NUM_PRIMS_WRITTEN",
"N geometry shader stream-out primitives (written)");
} else {
gen_perf_query_info_add_stat_reg(query, GEN7_SO_PRIM_STORAGE_NEEDED(0), 1, 1,
"SO_PRIM_STORAGE_NEEDED (Stream 0)",
"N stream-out (stream 0) primitives (total)");
gen_perf_query_info_add_stat_reg(query, GEN7_SO_PRIM_STORAGE_NEEDED(1), 1, 1,
"SO_PRIM_STORAGE_NEEDED (Stream 1)",
"N stream-out (stream 1) primitives (total)");
gen_perf_query_info_add_stat_reg(query, GEN7_SO_PRIM_STORAGE_NEEDED(2), 1, 1,
"SO_PRIM_STORAGE_NEEDED (Stream 2)",
"N stream-out (stream 2) primitives (total)");
gen_perf_query_info_add_stat_reg(query, GEN7_SO_PRIM_STORAGE_NEEDED(3), 1, 1,
"SO_PRIM_STORAGE_NEEDED (Stream 3)",
"N stream-out (stream 3) primitives (total)");
gen_perf_query_info_add_stat_reg(query, GEN7_SO_NUM_PRIMS_WRITTEN(0), 1, 1,
"SO_NUM_PRIMS_WRITTEN (Stream 0)",
"N stream-out (stream 0) primitives (written)");
gen_perf_query_info_add_stat_reg(query, GEN7_SO_NUM_PRIMS_WRITTEN(1), 1, 1,
"SO_NUM_PRIMS_WRITTEN (Stream 1)",
"N stream-out (stream 1) primitives (written)");
gen_perf_query_info_add_stat_reg(query, GEN7_SO_NUM_PRIMS_WRITTEN(2), 1, 1,
"SO_NUM_PRIMS_WRITTEN (Stream 2)",
"N stream-out (stream 2) primitives (written)");
gen_perf_query_info_add_stat_reg(query, GEN7_SO_NUM_PRIMS_WRITTEN(3), 1, 1,
"SO_NUM_PRIMS_WRITTEN (Stream 3)",
"N stream-out (stream 3) primitives (written)");
}
gen_perf_query_info_add_basic_stat_reg(query, HS_INVOCATION_COUNT,
"N TCS shader invocations");
gen_perf_query_info_add_basic_stat_reg(query, DS_INVOCATION_COUNT,
"N TES shader invocations");
gen_perf_query_info_add_basic_stat_reg(query, GS_INVOCATION_COUNT,
"N geometry shader invocations");
gen_perf_query_info_add_basic_stat_reg(query, GS_PRIMITIVES_COUNT,
"N geometry shader primitives emitted");
gen_perf_query_info_add_basic_stat_reg(query, CL_INVOCATION_COUNT,
"N primitives entering clipping");
gen_perf_query_info_add_basic_stat_reg(query, CL_PRIMITIVES_COUNT,
"N primitives leaving clipping");
if (devinfo->is_haswell || devinfo->gen == 8) {
gen_perf_query_info_add_stat_reg(query, PS_INVOCATION_COUNT, 1, 4,
"N fragment shader invocations",
"N fragment shader invocations");
} else {
gen_perf_query_info_add_basic_stat_reg(query, PS_INVOCATION_COUNT,
"N fragment shader invocations");
}
gen_perf_query_info_add_basic_stat_reg(query, PS_DEPTH_COUNT,
"N z-pass fragments");
if (devinfo->gen >= 7) {
gen_perf_query_info_add_basic_stat_reg(query, CS_INVOCATION_COUNT,
"N compute shader invocations");
}
query->data_size = sizeof(uint64_t) * query->n_counters;
}
/* gen_device_info will have incorrect default topology values for unsupported kernels.
* verify kernel support to ensure OA metrics are accurate.
*/
static bool
oa_metrics_kernel_support(int fd, const struct gen_device_info *devinfo)
{
if (devinfo->gen >= 10) {
/* topology uAPI required for CNL+ (kernel 4.17+) make a call to the api
* to verify support
*/
struct drm_i915_query_item item = {
.query_id = DRM_I915_QUERY_TOPOLOGY_INFO,
};
struct drm_i915_query query = {
.num_items = 1,
.items_ptr = (uintptr_t) &item,
};
/* kernel 4.17+ supports the query */
return drmIoctl(fd, DRM_IOCTL_I915_QUERY, &query) == 0;
}
if (devinfo->gen >= 8) {
/* 4.13+ api required for gen8 - gen9 */
int mask;
struct drm_i915_getparam gp = {
.param = I915_PARAM_SLICE_MASK,
.value = &mask,
};
/* kernel 4.13+ supports this parameter */
return drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp) == 0;
}
if (devinfo->gen == 7)
/* default topology values are correct for HSW */
return true;
/* oa not supported before gen 7*/
return false;
}
static void *
brw_oa_bo_alloc(void *bufmgr, const char *name, uint64_t size)
{
return brw_bo_alloc(bufmgr, name, size, BRW_MEMZONE_OTHER);
}
static void
brw_oa_emit_mi_report_perf_count(void *c,
void *bo,
uint32_t offset_in_bytes,
uint32_t report_id)
{
struct brw_context *ctx = c;
ctx->vtbl.emit_mi_report_perf_count(ctx,
bo,
offset_in_bytes,
report_id);
}
typedef void (*bo_unreference_t)(void *);
typedef void (* emit_mi_report_t)(void *, void *, uint32_t, uint32_t);
typedef void (*emit_mi_flush_t)(void *);
static void
brw_oa_batchbuffer_flush(void *c, const char *file, int line)
{
struct brw_context *ctx = c;
_intel_batchbuffer_flush_fence(ctx, -1, NULL, file, line);
}
typedef void (*capture_frequency_stat_register_t)(void *, void *, uint32_t );
typedef void (*store_register_mem64_t)(void *ctx, void *bo,
uint32_t reg, uint32_t offset);
static unsigned
brw_init_perf_query_info(struct gl_context *ctx)
{
struct brw_context *brw = brw_context(ctx);
const struct gen_device_info *devinfo = &brw->screen->devinfo;
__DRIscreen *screen = brw->screen->driScrnPriv;
struct gen_perf_context *perf_ctx = &brw->perf_ctx;
if (perf_ctx->perf)
return perf_ctx->perf->n_queries;
perf_ctx->perf = gen_perf_new(brw);
struct gen_perf_config *perf_cfg = perf_ctx->perf;
perf_cfg->vtbl.bo_alloc = brw_oa_bo_alloc;
perf_cfg->vtbl.bo_unreference = (bo_unreference_t)brw_bo_unreference;
perf_cfg->vtbl.emit_mi_flush = (emit_mi_flush_t)brw_emit_mi_flush;
perf_cfg->vtbl.emit_mi_report_perf_count =
(emit_mi_report_t)brw_oa_emit_mi_report_perf_count;
perf_cfg->vtbl.batchbuffer_flush = brw_oa_batchbuffer_flush;
perf_cfg->vtbl.capture_frequency_stat_register =
(capture_frequency_stat_register_t) capture_frequency_stat_register;
perf_cfg->vtbl.store_register_mem64 =
(store_register_mem64_t) brw_store_register_mem64;
init_pipeline_statistic_query_registers(brw);
gen_perf_query_register_mdapi_statistic_query(&brw->screen->devinfo,
brw->perf_ctx.perf);
if ((oa_metrics_kernel_support(screen->fd, devinfo)) &&
(gen_perf_load_oa_metrics(perf_cfg, screen->fd, devinfo)))
gen_perf_query_register_mdapi_oa_query(devinfo, perf_cfg);
perf_ctx->unaccumulated =
ralloc_array(brw, struct gen_perf_query_object *, 2);
perf_ctx->unaccumulated_elements = 0;
perf_ctx->unaccumulated_array_size = 2;
exec_list_make_empty(&perf_ctx->sample_buffers);
exec_list_make_empty(&perf_ctx->free_sample_buffers);
/* It's convenient to guarantee that this linked list of sample
* buffers is never empty so we add an empty head so when we
* Begin an OA query we can always take a reference on a buffer
* in this list.
*/
struct oa_sample_buf *buf = gen_perf_get_free_sample_buf(&brw->perf_ctx);
exec_list_push_head(&perf_ctx->sample_buffers, &buf->link);
perf_ctx->oa_stream_fd = -1;
perf_ctx->next_query_start_report_id = 1000;
return perf_cfg->n_queries;
}
void
brw_init_performance_queries(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
ctx->Driver.InitPerfQueryInfo = brw_init_perf_query_info;
ctx->Driver.GetPerfQueryInfo = brw_get_perf_query_info;
ctx->Driver.GetPerfCounterInfo = brw_get_perf_counter_info;
ctx->Driver.NewPerfQueryObject = brw_new_perf_query_object;
ctx->Driver.DeletePerfQuery = brw_delete_perf_query;
ctx->Driver.BeginPerfQuery = brw_begin_perf_query;
ctx->Driver.EndPerfQuery = brw_end_perf_query;
ctx->Driver.WaitPerfQuery = brw_wait_perf_query;
ctx->Driver.IsPerfQueryReady = brw_is_perf_query_ready;
ctx->Driver.GetPerfQueryData = brw_get_perf_query_data;
}