quick.c

#include <stdio.h>
#include <lib/pan_device.h>
#include "pan_perf.h"

int main(void) {
        int fd = drmOpenWithType("panfrost", NULL, DRM_NODE_RENDER);

        if (fd < 0) {
                fprintf(stderr, "No panfrost device\n");
                exit(1);
        }

        void *ctx = ralloc_context(NULL);
        struct panfrost_perf *perf = rzalloc(ctx, struct panfrost_perf);

        struct panfrost_device dev = {};
        panfrost_open_device(ctx, fd, &dev);

        panfrost_perf_init(perf, &dev);
        int ret = panfrost_perf_enable(perf);
        
        if (ret < 0) {
                fprintf(stderr, "failed to enable counters (%d)\n", ret);
                fprintf(stderr, "try `# echo Y > /sys/module/panfrost/parameters/unstable_ioctls`\n");

                exit(1);
        }

        sleep(1);

        panfrost_perf_dump(perf);

        for (unsigned i = 0; i < perf->cfg->n_categories; ++i) {
                const struct panfrost_perf_category *cat = &perf->cfg->categories[i];
                printf("%s\n", cat->name);

                for (unsigned j = 0; j < cat->n_counters; ++j) {
                        const struct panfrost_perf_counter *ctr = &cat->counters[j];
                        uint32_t val = panfrost_perf_counter_read(ctr, perf);
                        printf("%s (%s): %u\n", ctr->name, ctr->symbol_name, val);
                }

                printf("\n");
        }

        if (panfrost_perf_disable(perf) < 0) {
                fprintf(stderr, "failed to disable counters\n");
                exit(1);
        }

        panfrost_close_device(&dev);
}