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https://github.com/tiagovignatti/intel-gpu-tools.git
synced 2025-06-10 09:26:10 +00:00
intel_gpu_top: initialize monitoring statistics at startup
This patch initializes the last_stats[] for registers prior to starting the monitoring itself. This way, the first measure will already contain the difference from the previous value instead of non-initialized value. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
This commit is contained in:
Eugeni Dodonov
parent
4b0a15e45d
commit
431fe7803d
@ -16,8 +16,21 @@ privilege to map the graphics device.
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.B -s [samples per second]
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number of samples to acquire per second
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.TP
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.B -o [output file]
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run non-interactively and collect usage statistics to [file]
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.TP
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.B -e ["command to profile"]
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execute a command, and leave when it is finished. Note that the entire command
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with all parameters should be included as one parameter.
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.TP
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.B -h
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show usage notes
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.SH EXAMPLES
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.TP
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intel_gpu_top -o "cairo-trace-gvim.log" -s 100 -e "cairo-perf-trace /tmp/gvim"
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will run cairo-perf-trace with /tmp/gvim trace, non-interactively, saving the
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statistics into cairo-trace-gvim.log file, and collecting 100 samples per
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second.
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.PP
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Note that idle units are not
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displayed, so an entirely idle GPU will only display the ring status and
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@ -33,6 +33,8 @@
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#include <err.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <string.h>
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#include "intel_gpu_tools.h"
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#include "instdone.h"
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@ -373,24 +375,39 @@ static void ring_sample(struct ring *ring)
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ring->full += full;
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}
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static void ring_print_header(FILE *out, struct ring *ring)
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{
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fprintf(out, "%.6s%%\tops\t",
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ring->name
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);
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}
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static void ring_print(struct ring *ring, unsigned long samples_per_sec,
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FILE *output)
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{
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int samples_to_percent_ratio, percent, len;
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if (!ring->size)
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return;
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/* Calculate current value of samples_to_percent_ratio */
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samples_to_percent_ratio = (ring->idle * 100) / samples_per_sec;
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percent = 100 - samples_to_percent_ratio;
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len = fprintf(output, "%25s busy: %3d%%: ", ring->name, percent);
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print_percentage_bar (percent, len);
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fprintf(output, "%24s space: %d/%d (%d%%)\n",
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ring->name,
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(int)(ring->full / samples_per_sec),
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ring->size,
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(int)((ring->full / samples_to_percent_ratio) / ring->size));
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if (output == stdout) {
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if (!ring->size)
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return;
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len = fprintf(output, "%25s busy: %3d%%: ", ring->name, percent);
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print_percentage_bar (percent, len);
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fprintf(output, "%24s space: %d/%d (%d%%)\n",
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ring->name,
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(int)(ring->full / samples_per_sec),
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ring->size,
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(int)((ring->full / samples_to_percent_ratio) / ring->size));
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} else {
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fprintf(output, "%3d\t%d\t",
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(ring->size) ? 100 - ring->idle / samples_to_percent_ratio : -1,
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(ring->size) ? (int)(ring->full / samples_per_sec) : -1
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);
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}
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}
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static void
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@ -402,6 +419,7 @@ usage(const char *appname)
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"\n"
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"The following parameters apply:\n"
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"[-s <samples>] samples per seconds (default %d)\n"
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"[-o <file>] output to file (default to stdio)\n"
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"[-h] show this help screen\n"
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"\n",
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appname,
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@ -429,17 +447,29 @@ int main(int argc, char **argv)
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int i, ch;
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int samples_per_sec = SAMPLES_PER_SEC;
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FILE *output = stdout;
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double elapsed_time=0;
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int print_headers=1;
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pid_t child_pid=-1;
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int child_stat;
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char *cmd=NULL;
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/* Parse options? */
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while ((ch = getopt(argc, argv, "s:h")) != -1)
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{
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while ((ch = getopt(argc, argv, "s:o:h")) != -1) {
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switch (ch) {
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case 'e': cmd = strdup(optarg);
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break;
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case 's': samples_per_sec = atoi(optarg);
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if (samples_per_sec < 100) {
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fprintf(stderr, "Error: samples per second must be >= 100\n");
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exit(1);
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}
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break;
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case 'o': output = fopen(optarg, "w");
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if (!output) {
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perror("fopen");
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exit(1);
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}
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break;
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case 'h':
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usage(argv[0]);
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exit(0);
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@ -454,6 +484,37 @@ int main(int argc, char **argv)
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argc -= optind;
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argv += optind;
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/* Do we have a command to run? */
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if (cmd != NULL)
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{
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if (output != stdout) {
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fprintf(output, "# Profiling: %s\n", cmd);
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fflush(output);
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}
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child_pid = fork();
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if (child_pid < 0)
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{
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perror("fork");
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exit(1);
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}
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else if (child_pid == 0) {
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int res;
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res = system(cmd);
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free(cmd);
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if (res < 0)
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perror("running command");
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if (output != stdout) {
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fflush(output);
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fprintf(output, "# %s exited with status %d\n", cmd, res);
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fflush(output);
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}
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exit(0);
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}
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else {
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free(cmd);
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}
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}
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pci_dev = intel_get_pci_device();
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devid = pci_dev->device_id;
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intel_get_mmio(pci_dev);
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@ -473,9 +534,25 @@ int main(int argc, char **argv)
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ring_init(&blt_ring);
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}
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/* Initialize GPU stats */
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if (HAS_STATS_REGS(devid)) {
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for (i = 0; i < STATS_COUNT; i++) {
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uint32_t stats_high, stats_low, stats_high_2;
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do {
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stats_high = INREG(stats_regs[i] + 4);
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stats_low = INREG(stats_regs[i]);
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stats_high_2 = INREG(stats_regs[i] + 4);
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} while (stats_high != stats_high_2);
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last_stats[i] = (uint64_t)stats_high << 32 |
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stats_low;
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}
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}
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for (;;) {
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int j;
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unsigned long long t1, ti, tf;
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unsigned long long t1, ti, tf, t2;
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unsigned long long def_sleep = 1000000 / samples_per_sec;
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unsigned long long last_samples_per_sec = samples_per_sec;
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char clear_screen[] = {0x1b, '[', 'H',
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@ -546,39 +623,82 @@ int main(int argc, char **argv)
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if (max_lines >= num_instdone_bits)
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max_lines = num_instdone_bits;
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fprintf(output, "%s", clear_screen);
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t2 = gettime();
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elapsed_time += (t2 - t1) / 1000000.0;
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print_clock_info(pci_dev);
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if (output == stdout) {
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fprintf(output, "%s", clear_screen);
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print_clock_info(pci_dev);
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ring_print(&render_ring, last_samples_per_sec, output);
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ring_print(&bsd_ring, last_samples_per_sec, output);
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ring_print(&bsd6_ring, last_samples_per_sec, output);
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ring_print(&blt_ring, last_samples_per_sec, output);
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ring_print(&render_ring, last_samples_per_sec, output);
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ring_print(&bsd_ring, last_samples_per_sec, output);
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ring_print(&bsd6_ring, last_samples_per_sec, output);
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ring_print(&blt_ring, last_samples_per_sec, output);
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fprintf(output, "\n%30s %s\n", "task", "percent busy");
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for (i = 0; i < max_lines; i++) {
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if (top_bits_sorted[i]->count > 0) {
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percent = (top_bits_sorted[i]->count * 100) /
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last_samples_per_sec;
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len = fprintf(output, "%30s: %3d%%: ",
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top_bits_sorted[i]->bit->name,
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percent);
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print_percentage_bar (percent, len);
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} else {
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fprintf(output, "%*s", PERCENTAGE_BAR_END, "");
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fprintf(output, "\n%30s %s\n", "task", "percent busy");
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for (i = 0; i < max_lines; i++) {
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if (top_bits_sorted[i]->count > 0) {
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percent = (top_bits_sorted[i]->count * 100) /
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last_samples_per_sec;
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len = fprintf(output, "%30s: %3d%%: ",
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top_bits_sorted[i]->bit->name,
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percent);
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print_percentage_bar (percent, len);
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} else {
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fprintf(output, "%*s", PERCENTAGE_BAR_END, "");
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}
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if (i < STATS_COUNT && HAS_STATS_REGS(devid)) {
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fprintf(output, "%13s: %llu (%lld/sec)",
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stats_reg_names[i],
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stats[i],
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stats[i] - last_stats[i]);
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last_stats[i] = stats[i];
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} else {
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if (!top_bits_sorted[i]->count)
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break;
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}
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fprintf(output, "\n");
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}
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} else {
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/* Print headers for columns at first run */
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if (print_headers) {
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fprintf(output, "# time\t");
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ring_print_header(output, &render_ring);
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ring_print_header(output, &bsd_ring);
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ring_print_header(output, &bsd6_ring);
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ring_print_header(output, &blt_ring);
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for (i = 0; i < MAX_NUM_TOP_BITS; i++) {
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if (i < STATS_COUNT && HAS_STATS_REGS(devid)) {
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fprintf(output, "%.6s\t",
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stats_reg_names[i]
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);
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}
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if (!top_bits[i].count)
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continue;
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}
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fprintf(output, "\n");
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print_headers = 0;
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}
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if (i < STATS_COUNT && HAS_STATS_REGS(devid)) {
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fprintf(output, "%13s: %llu (%lld/sec)",
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stats_reg_names[i],
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stats[i],
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stats[i] - last_stats[i]);
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last_stats[i] = stats[i];
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} else {
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if (!top_bits_sorted[i]->count)
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break;
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/* Print statistics */
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fprintf(output, "%.2f\t", elapsed_time);
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ring_print(&render_ring, last_samples_per_sec, output);
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ring_print(&bsd_ring, last_samples_per_sec, output);
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ring_print(&bsd6_ring, last_samples_per_sec, output);
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ring_print(&blt_ring, last_samples_per_sec, output);
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for (i = 0; i < MAX_NUM_TOP_BITS; i++) {
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if (i < STATS_COUNT && HAS_STATS_REGS(devid)) {
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fprintf(output, "%lu\t",
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stats[i] - last_stats[i]);
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last_stats[i] = stats[i];
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}
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if (!top_bits[i].count)
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continue;
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}
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fprintf(output, "\n");
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fflush(output);
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}
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for (i = 0; i < num_instdone_bits; i++) {
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@ -587,7 +707,23 @@ int main(int argc, char **argv)
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if (i < STATS_COUNT)
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last_stats[i] = stats[i];
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}
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/* Check if child has gone */
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if (child_pid > 0)
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{
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int res;
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if ((res = waitpid(child_pid, &child_stat, WNOHANG)) == -1) {
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perror("waitpid");
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exit(1);
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}
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if (res == 0)
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continue;
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if (WIFEXITED(child_stat))
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break;
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}
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}
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fclose(output);
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return 0;
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}
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