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intel_gpu_top: support profiling user-specified commands

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This patch adds support for running intel_gpu_top to profile specific
commands. The required command will be carried out in separate process,
and main intel_gpu_top will leave when the child process will exit.

Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
This commit is contained in:
Eugeni Dodonov 2011-09-05 19:41:24 -03:00
parent c2983f24e3
commit a483c97d91
2 changed files with 65 additions and 1 deletions
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10
man/intel_gpu_top.1
View File

@ -19,8 +19,18 @@ number of samples to acquire per second
.B -o [output file]
run non-interactively and collect usage statistics to [file]
.TP
.B -e ["command to profile"]
execute a command, and leave when it is finished. Note that the entire command
with all parameters should be included as one parameter.
.TP
.B -h
show usage notes
.SH EXAMPLES
.TP
intel_gpu_top -o "cairo-trace-gvim.log" -s 100 -e "cairo-perf-trace /tmp/gvim"
will run cairo-perf-trace with /tmp/gvim trace, non-interactively, saving the
statistics into cairo-trace-gvim.log file, and collecting 100 samples per
second.
.PP
Note that idle units are not
displayed, so an entirely idle GPU will only display the ring status and

56
tools/intel_gpu_top.c
View File

@ -33,6 +33,8 @@
#include <err.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <string.h>
#include "intel_gpu_tools.h"
#include "instdone.h"
@ -447,11 +449,16 @@ int main(int argc, char **argv)
FILE *output = stdout;
double elapsed_time=0;
int print_headers=1;
pid_t child_pid=-1;
int child_stat;
char *cmd=NULL;
/* Parse options? */
while ((ch = getopt(argc, argv, "s:o:h")) != -1)
while ((ch = getopt(argc, argv, "s:o:e:h")) != -1)
{
switch (ch) {
case 'e': cmd = strdup(optarg);
break;
case 's': samples_per_sec = atoi(optarg);
if (samples_per_sec < 100) {
fprintf(stderr, "Error: samples per second must be >= 100\n");
@ -479,6 +486,37 @@ int main(int argc, char **argv)
argc -= optind;
argv += optind;
/* Do we have a command to run? */
if (cmd != NULL)
{
if (output != stdout) {
fprintf(output, "# Profiling: %s\n", cmd);
fflush(output);
}
child_pid = fork();
if (child_pid < 0)
{
perror("fork");
exit(1);
}
else if (child_pid == 0) {
int res;
res = system(cmd);
free(cmd);
if (res < 0)
perror("running command");
if (output != stdout) {
fflush(output);
fprintf(output, "# %s exited with status %d\n", cmd, res);
fflush(output);
}
exit(0);
}
else {
free(cmd);
}
}
pci_dev = intel_get_pci_device();
devid = pci_dev->device_id;
intel_get_mmio(pci_dev);
@ -671,7 +709,23 @@ int main(int argc, char **argv)
if (i < STATS_COUNT)
last_stats[i] = stats[i];
}
/* Check if child has gone */
if (child_pid > 0)
{
int res;
if ((res = waitpid(child_pid, &child_stat, WNOHANG)) == -1) {
perror("waitpid");
exit(1);
}
if (res == 0)
continue;
if (WIFEXITED(child_stat))
break;
}
}
fclose(output);
return 0;
}