mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-03 00:54:09 +08:00
721a1f53df
Some tests have sub-tests we want to run, so allow passing this.
Wang tried to avoid having to touch all tests, but then, having the
test.func in an anonymous union makes the build fail on older compilers,
like the one in RHEL6, where:
test a = {
.func = foo,
};
fails.
To fix it leave the func pointer in the main structure and pass the subtest
index to all tests, end result function is the same, but we have just one
function pointer, not two, with and without the subtest index as an argument.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-5genj0ficwdmelpoqlds0u4y@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
#include "tests/tests.h"
|
|
#include "perf.h"
|
|
#include "cloexec.h"
|
|
#include "debug.h"
|
|
#include "evlist.h"
|
|
#include "evsel.h"
|
|
#include "arch-tests.h"
|
|
|
|
#include <sys/mman.h>
|
|
#include <string.h>
|
|
|
|
static pid_t spawn(void)
|
|
{
|
|
pid_t pid;
|
|
|
|
pid = fork();
|
|
if (pid)
|
|
return pid;
|
|
|
|
while(1);
|
|
sleep(5);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Create an event group that contains both a sampled hardware
|
|
* (cpu-cycles) and software (intel_cqm/llc_occupancy/) event. We then
|
|
* wait for the hardware perf counter to overflow and generate a PMI,
|
|
* which triggers an event read for both of the events in the group.
|
|
*
|
|
* Since reading Intel CQM event counters requires sending SMP IPIs, the
|
|
* CQM pmu needs to handle the above situation gracefully, and return
|
|
* the last read counter value to avoid triggering a WARN_ON_ONCE() in
|
|
* smp_call_function_many() caused by sending IPIs from NMI context.
|
|
*/
|
|
int test__intel_cqm_count_nmi_context(int subtest __maybe_unused)
|
|
{
|
|
struct perf_evlist *evlist = NULL;
|
|
struct perf_evsel *evsel = NULL;
|
|
struct perf_event_attr pe;
|
|
int i, fd[2], flag, ret;
|
|
size_t mmap_len;
|
|
void *event;
|
|
pid_t pid;
|
|
int err = TEST_FAIL;
|
|
|
|
flag = perf_event_open_cloexec_flag();
|
|
|
|
evlist = perf_evlist__new();
|
|
if (!evlist) {
|
|
pr_debug("perf_evlist__new failed\n");
|
|
return TEST_FAIL;
|
|
}
|
|
|
|
ret = parse_events(evlist, "intel_cqm/llc_occupancy/", NULL);
|
|
if (ret) {
|
|
pr_debug("parse_events failed\n");
|
|
err = TEST_SKIP;
|
|
goto out;
|
|
}
|
|
|
|
evsel = perf_evlist__first(evlist);
|
|
if (!evsel) {
|
|
pr_debug("perf_evlist__first failed\n");
|
|
goto out;
|
|
}
|
|
|
|
memset(&pe, 0, sizeof(pe));
|
|
pe.size = sizeof(pe);
|
|
|
|
pe.type = PERF_TYPE_HARDWARE;
|
|
pe.config = PERF_COUNT_HW_CPU_CYCLES;
|
|
pe.read_format = PERF_FORMAT_GROUP;
|
|
|
|
pe.sample_period = 128;
|
|
pe.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_READ;
|
|
|
|
pid = spawn();
|
|
|
|
fd[0] = sys_perf_event_open(&pe, pid, -1, -1, flag);
|
|
if (fd[0] < 0) {
|
|
pr_debug("failed to open event\n");
|
|
goto out;
|
|
}
|
|
|
|
memset(&pe, 0, sizeof(pe));
|
|
pe.size = sizeof(pe);
|
|
|
|
pe.type = evsel->attr.type;
|
|
pe.config = evsel->attr.config;
|
|
|
|
fd[1] = sys_perf_event_open(&pe, pid, -1, fd[0], flag);
|
|
if (fd[1] < 0) {
|
|
pr_debug("failed to open event\n");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Pick a power-of-two number of pages + 1 for the meta-data
|
|
* page (struct perf_event_mmap_page). See tools/perf/design.txt.
|
|
*/
|
|
mmap_len = page_size * 65;
|
|
|
|
event = mmap(NULL, mmap_len, PROT_READ, MAP_SHARED, fd[0], 0);
|
|
if (event == (void *)(-1)) {
|
|
pr_debug("failed to mmap %d\n", errno);
|
|
goto out;
|
|
}
|
|
|
|
sleep(1);
|
|
|
|
err = TEST_OK;
|
|
|
|
munmap(event, mmap_len);
|
|
|
|
for (i = 0; i < 2; i++)
|
|
close(fd[i]);
|
|
|
|
kill(pid, SIGKILL);
|
|
wait(NULL);
|
|
out:
|
|
perf_evlist__delete(evlist);
|
|
return err;
|
|
}
|