/* For the CLR_() macros */
#include <pthread.h>

#include "evlist.h"
#include "evsel.h"
#include "thread_map.h"
#include "cpumap.h"
#include "tests.h"
#include <linux/err.h>

/*
 * This test will generate random numbers of calls to some getpid syscalls,
 * then establish an mmap for a group of events that are created to monitor
 * the syscalls.
 *
 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
 * sample.id field to map back to its respective perf_evsel instance.
 *
 * Then it checks if the number of syscalls reported as perf events by
 * the kernel corresponds to the number of syscalls made.
 */
int test__basic_mmap(int subtest __maybe_unused)
{
	int err = -1;
	union perf_event *event;
	struct thread_map *threads;
	struct cpu_map *cpus;
	struct perf_evlist *evlist;
	cpu_set_t cpu_set;
	const char *syscall_names[] = { "getsid", "getppid", "getpgid", };
	pid_t (*syscalls[])(void) = { (void *)getsid, getppid, (void*)getpgid };
#define nsyscalls ARRAY_SIZE(syscall_names)
	unsigned int nr_events[nsyscalls],
		     expected_nr_events[nsyscalls], i, j;
	struct perf_evsel *evsels[nsyscalls], *evsel;
	char sbuf[STRERR_BUFSIZE];

	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_free_threads;
	}

	CPU_ZERO(&cpu_set);
	CPU_SET(cpus->map[0], &cpu_set);
	sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
	if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
		pr_debug("sched_setaffinity() failed on CPU %d: %s ",
			 cpus->map[0], str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_free_cpus;
	}

	evlist = perf_evlist__new();
	if (evlist == NULL) {
		pr_debug("perf_evlist__new\n");
		goto out_free_cpus;
	}

	perf_evlist__set_maps(evlist, cpus, threads);

	for (i = 0; i < nsyscalls; ++i) {
		char name[64];

		snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
		evsels[i] = perf_evsel__newtp("syscalls", name);
		if (IS_ERR(evsels[i])) {
			pr_debug("perf_evsel__new\n");
			goto out_delete_evlist;
		}

		evsels[i]->attr.wakeup_events = 1;
		perf_evsel__set_sample_id(evsels[i], false);

		perf_evlist__add(evlist, evsels[i]);

		if (perf_evsel__open(evsels[i], cpus, threads) < 0) {
			pr_debug("failed to open counter: %s, "
				 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
				 str_error_r(errno, sbuf, sizeof(sbuf)));
			goto out_delete_evlist;
		}

		nr_events[i] = 0;
		expected_nr_events[i] = 1 + rand() % 127;
	}

	if (perf_evlist__mmap(evlist, 128, true) < 0) {
		pr_debug("failed to mmap events: %d (%s)\n", errno,
			 str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_delete_evlist;
	}

	for (i = 0; i < nsyscalls; ++i)
		for (j = 0; j < expected_nr_events[i]; ++j) {
			int foo = syscalls[i]();
			++foo;
		}

	while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
		struct perf_sample sample;

		if (event->header.type != PERF_RECORD_SAMPLE) {
			pr_debug("unexpected %s event\n",
				 perf_event__name(event->header.type));
			goto out_delete_evlist;
		}

		err = perf_evlist__parse_sample(evlist, event, &sample);
		if (err) {
			pr_err("Can't parse sample, err = %d\n", err);
			goto out_delete_evlist;
		}

		err = -1;
		evsel = perf_evlist__id2evsel(evlist, sample.id);
		if (evsel == NULL) {
			pr_debug("event with id %" PRIu64
				 " doesn't map to an evsel\n", sample.id);
			goto out_delete_evlist;
		}
		nr_events[evsel->idx]++;
		perf_evlist__mmap_consume(evlist, 0);
	}

	err = 0;
	evlist__for_each_entry(evlist, evsel) {
		if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
			pr_debug("expected %d %s events, got %d\n",
				 expected_nr_events[evsel->idx],
				 perf_evsel__name(evsel), nr_events[evsel->idx]);
			err = -1;
			goto out_delete_evlist;
		}
	}

out_delete_evlist:
	perf_evlist__delete(evlist);
	cpus	= NULL;
	threads = NULL;
out_free_cpus:
	cpu_map__put(cpus);
out_free_threads:
	thread_map__put(threads);
	return err;
}
lected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Markus Mayer &lt;mmayer@broadcom.com&gt;</td><td class='right'>2016-12-19 12:10:28 -0800</td></tr>
<tr><th>committer</th><td>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2017-01-27 11:43:49 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/tegra?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/soc/tegra?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>2d2021f8161db3e9ed38b9a966a225b66dff8e58</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/soc/tegra?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>include/soc/tegra</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/tegra?id=9b02c54bc951fca884ba5719f42a27e8240965bf'>9b02c54bc951fca884ba5719f42a27e8240965bf</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/soc/tegra?id=3c223c19aea85d3dda1416c187915f4a30b04b1f&amp;id2=9b02c54bc951fca884ba5719f42a27e8240965bf'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpufreq: brcmstb-avs-cpufreq: properly retrieve P-state upon suspend</div><div class='commit-msg'>The AVS GET_PMAP command does return a P-state along with the P-map
information. However, that P-state is the initial P-state when the
P-map was first downloaded to AVS. It is *not* the current P-state.

Therefore, we explicitly retrieve the P-state using the GET_PSTATE
command.

Signed-off-by: Markus Mayer &lt;mmayer@broadcom.com&gt;
Acked-by: Viresh Kumar &lt;viresh.kumar@linaro.org&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>Diffstat</a> (limited to 'include/soc/tegra')</div><table summary='diffstat' class='diffstat'>l_on_read()</div><div class='commit-msg'>Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")
added the proper mb(), but removed the test "prev_write_sz &lt; pending_sz"
when making the signal decision.

As a result, the guest can signal the host unnecessarily,
and then the host can throttle the guest because the host
thinks the guest is buggy or malicious; finally the user
running stress test can perceive intermittent freeze of
the guest.

This patch brings back the test, and properly handles the
in-place consumption APIs used by NetVSC (see get_next_pkt_raw(),
put_pkt_raw() and commit_rd_index()).

Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")

Signed-off-by: Dexuan Cui &lt;decui@microsoft.com&gt;
Reported-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Tested-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Cc: "K. Y. Srinivasan" &lt;kys@microsoft.com&gt;
Cc: Haiyang Zhang &lt;haiyangz@microsoft.com&gt;
Cc: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>Diffstat</a> (limited to 'tools/lib/subcmd/help.c')</div><table summary='diffstat' class='diffstat'>