ef503831d8
Most uses of the evsel constructor are followed by a call to perf_evlist__add with an idex of evlist->nr_entries, so make rename the current constructor to perf_evsel__new_idx and remove the need for passing the constructor for the common case. We still need the new_idx variant because the way groups are handled, with evsel->nr_members holding the number of entries in an evlist, partitioning the evlist into sublists inside a single linked list. This asks for a clarifying refactoring, but for now simplify the non parser cases, so that tool writers don't have to bother with evsel idx setting. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-zy9tskx6jqm2rmw7468zze2a@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
#include "evsel.h"
|
|
#include "tests.h"
|
|
#include "thread_map.h"
|
|
#include "cpumap.h"
|
|
#include "debug.h"
|
|
|
|
int test__open_syscall_event_on_all_cpus(void)
|
|
{
|
|
int err = -1, fd, cpu;
|
|
struct cpu_map *cpus;
|
|
struct perf_evsel *evsel;
|
|
unsigned int nr_open_calls = 111, i;
|
|
cpu_set_t cpu_set;
|
|
struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
|
|
|
|
if (threads == NULL) {
|
|
pr_debug("thread_map__new\n");
|
|
return -1;
|
|
}
|
|
|
|
cpus = cpu_map__new(NULL);
|
|
if (cpus == NULL) {
|
|
pr_debug("cpu_map__new\n");
|
|
goto out_thread_map_delete;
|
|
}
|
|
|
|
CPU_ZERO(&cpu_set);
|
|
|
|
evsel = perf_evsel__newtp("syscalls", "sys_enter_open");
|
|
if (evsel == NULL) {
|
|
pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
|
|
goto out_thread_map_delete;
|
|
}
|
|
|
|
if (perf_evsel__open(evsel, cpus, threads) < 0) {
|
|
pr_debug("failed to open counter: %s, "
|
|
"tweak /proc/sys/kernel/perf_event_paranoid?\n",
|
|
strerror(errno));
|
|
goto out_evsel_delete;
|
|
}
|
|
|
|
for (cpu = 0; cpu < cpus->nr; ++cpu) {
|
|
unsigned int ncalls = nr_open_calls + cpu;
|
|
/*
|
|
* XXX eventually lift this restriction in a way that
|
|
* keeps perf building on older glibc installations
|
|
* without CPU_ALLOC. 1024 cpus in 2010 still seems
|
|
* a reasonable upper limit tho :-)
|
|
*/
|
|
if (cpus->map[cpu] >= CPU_SETSIZE) {
|
|
pr_debug("Ignoring CPU %d\n", cpus->map[cpu]);
|
|
continue;
|
|
}
|
|
|
|
CPU_SET(cpus->map[cpu], &cpu_set);
|
|
if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
|
|
pr_debug("sched_setaffinity() failed on CPU %d: %s ",
|
|
cpus->map[cpu],
|
|
strerror(errno));
|
|
goto out_close_fd;
|
|
}
|
|
for (i = 0; i < ncalls; ++i) {
|
|
fd = open("/etc/passwd", O_RDONLY);
|
|
close(fd);
|
|
}
|
|
CPU_CLR(cpus->map[cpu], &cpu_set);
|
|
}
|
|
|
|
/*
|
|
* Here we need to explicitely preallocate the counts, as if
|
|
* we use the auto allocation it will allocate just for 1 cpu,
|
|
* as we start by cpu 0.
|
|
*/
|
|
if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) {
|
|
pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr);
|
|
goto out_close_fd;
|
|
}
|
|
|
|
err = 0;
|
|
|
|
for (cpu = 0; cpu < cpus->nr; ++cpu) {
|
|
unsigned int expected;
|
|
|
|
if (cpus->map[cpu] >= CPU_SETSIZE)
|
|
continue;
|
|
|
|
if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) {
|
|
pr_debug("perf_evsel__read_on_cpu\n");
|
|
err = -1;
|
|
break;
|
|
}
|
|
|
|
expected = nr_open_calls + cpu;
|
|
if (evsel->counts->cpu[cpu].val != expected) {
|
|
pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
|
|
expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
|
|
err = -1;
|
|
}
|
|
}
|
|
|
|
perf_evsel__free_counts(evsel);
|
|
out_close_fd:
|
|
perf_evsel__close_fd(evsel, 1, threads->nr);
|
|
out_evsel_delete:
|
|
perf_evsel__delete(evsel);
|
|
out_thread_map_delete:
|
|
thread_map__delete(threads);
|
|
return err;
|
|
}
|