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1bca181580
Add the PAN_TRACE_SCOPE() and PAN_TRACE_FUNC() wrappers based on
MESA_TRACE_SCOPE_IF() in order to associate a category to each trace
and let users select the set of tracing categories to enable at
run-time through the PAN_CPU_TRACE environment variable. This makes
Panfrost tracing an opt-in and avoids to CPU cost of tracing by
default.
There are 3 categories for now:
- "lib" for the shared utilities
- "gl" for the Gallium driver
- "vk" for the Vulkan driver
Each of these categories are divided into subcategories so that
subsystems can easily be traced ("gl.csf" or "lib.kmod" for instance).
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Reviewed-by: Ashley Smith <ashley.smith@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39407>
102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/*
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* Copyright © 2026 Amazon.com, Inc. or its affiliates.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include "pan_trace.h"
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#include "util/os_misc.h"
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#define PAN_TRACE_ENV_VAR "PAN_CPU_TRACE"
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#define CATEGORY(str, flag) { str, ARRAY_SIZE(str) - 1, (uint64_t) (flag) }
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/* To be kept in sync with the pan_trace_category enum in pan_trace.h. */
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/* clang-format off */
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static struct {
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const char *str;
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size_t len;
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uint64_t flag;
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} categories_table[] = {
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/* Library categories. */
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CATEGORY("lib.afbc", PAN_TRACE_LIB_AFBC),
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CATEGORY("lib.desc", PAN_TRACE_LIB_DESC),
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CATEGORY("lib.kmod", PAN_TRACE_LIB_KMOD),
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CATEGORY("lib", PAN_TRACE_LIB_AFBC |
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PAN_TRACE_LIB_DESC |
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PAN_TRACE_LIB_KMOD),
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/* Gallium categories. */
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CATEGORY("gl.blit", PAN_TRACE_GL_BLIT),
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CATEGORY("gl.bo", PAN_TRACE_GL_BO),
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CATEGORY("gl.cmdstream", PAN_TRACE_GL_CMDSTREAM),
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CATEGORY("gl.context", PAN_TRACE_GL_CONTEXT),
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CATEGORY("gl.csf", PAN_TRACE_GL_CSF),
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CATEGORY("gl.disk_cache", PAN_TRACE_GL_DISK_CACHE),
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CATEGORY("gl.fb_preload", PAN_TRACE_GL_FB_PRELOAD),
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CATEGORY("gl.jm", PAN_TRACE_GL_JM),
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CATEGORY("gl.job", PAN_TRACE_GL_JOB),
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CATEGORY("gl.mempool", PAN_TRACE_GL_MEMPOOL),
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CATEGORY("gl.resource", PAN_TRACE_GL_RESOURCE),
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CATEGORY("gl.shader", PAN_TRACE_GL_SHADER),
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CATEGORY("gl", PAN_TRACE_GL_BLIT |
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PAN_TRACE_GL_BO |
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PAN_TRACE_GL_CMDSTREAM |
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PAN_TRACE_GL_CONTEXT |
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PAN_TRACE_GL_CSF |
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PAN_TRACE_GL_DISK_CACHE |
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PAN_TRACE_GL_FB_PRELOAD |
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PAN_TRACE_GL_JM |
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PAN_TRACE_GL_JOB |
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PAN_TRACE_GL_MEMPOOL |
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PAN_TRACE_GL_RESOURCE |
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PAN_TRACE_GL_SHADER),
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/* Vulkan categories. */
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CATEGORY("vk.csf", PAN_TRACE_VK_CSF),
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CATEGORY("vk", PAN_TRACE_VK_CSF),
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};
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/* clang-format on */
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uint64_t pan_trace_categories = 0;
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static bool
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is_separator(char c)
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{
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return c == ',' || c == ';' || c == ' ';
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}
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void
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pan_trace_init(void)
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{
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const char *list = os_get_option(PAN_TRACE_ENV_VAR);
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const char *str = NULL;
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uint64_t categories = 0;
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char prev_char = ',';
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if (!list)
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return;
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/* Parse list and flag enabled categories. */
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for (int i = 0; prev_char; prev_char = list[i++]) {
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if (!is_separator(list[i]) && list[i]) {
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if (is_separator(prev_char))
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str = &list[i];
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} else if (!is_separator(prev_char)) {
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for (int j = 0; j < ARRAY_SIZE(categories_table); j++) {
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size_t len = &list[i] - str;
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if (categories_table[j].len == len &&
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!strncasecmp(categories_table[j].str, str, len)) {
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categories |= categories_table[j].flag;
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break;
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}
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}
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}
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}
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pan_trace_categories = categories;
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}
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