From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- tools/perf/tests/task-exit.c | 161 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100644 tools/perf/tests/task-exit.c (limited to 'tools/perf/tests/task-exit.c') diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c new file mode 100644 index 000000000..95393edbf --- /dev/null +++ b/tools/perf/tests/task-exit.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "debug.h" +#include "evlist.h" +#include "evsel.h" +#include "target.h" +#include "thread_map.h" +#include "tests.h" +#include "util/mmap.h" + +#include +#include +#include +#include +#include +#include + +static int exited; +static int nr_exit; + +static void sig_handler(int sig __maybe_unused) +{ + exited = 1; +} + +/* + * evlist__prepare_workload will send a SIGUSR1 if the fork fails, since + * we asked by setting its exec_error to this handler. + */ +static void workload_exec_failed_signal(int signo __maybe_unused, + siginfo_t *info __maybe_unused, + void *ucontext __maybe_unused) +{ + exited = 1; + nr_exit = -1; +} + +/* + * This test will start a workload that does nothing then it checks + * if the number of exit event reported by the kernel is 1 or not + * in order to check the kernel returns correct number of event. + */ +static int test__task_exit(struct test_suite *test __maybe_unused, int subtest __maybe_unused) +{ + int err = -1; + union perf_event *event; + struct evsel *evsel; + struct evlist *evlist; + struct target target = { + .uses_mmap = true, + }; + const char *argv[] = { "true", NULL }; + char sbuf[STRERR_BUFSIZE]; + struct perf_cpu_map *cpus; + struct perf_thread_map *threads; + struct mmap *md; + int retry_count = 0; + + signal(SIGCHLD, sig_handler); + + evlist = evlist__new_dummy(); + if (evlist == NULL) { + pr_debug("evlist__new_dummy\n"); + return -1; + } + + /* + * Create maps of threads and cpus to monitor. In this case + * we start with all threads and cpus (-1, -1) but then in + * evlist__prepare_workload we'll fill in the only thread + * we're monitoring, the one forked there. + */ + cpus = perf_cpu_map__new_any_cpu(); + threads = thread_map__new_by_tid(-1); + if (!cpus || !threads) { + err = -ENOMEM; + pr_debug("Not enough memory to create thread/cpu maps\n"); + goto out_put_evlist; + } + + perf_evlist__set_maps(evlist__core(evlist), cpus, threads); + + err = evlist__prepare_workload(evlist, &target, argv, false, workload_exec_failed_signal); + if (err < 0) { + pr_debug("Couldn't run the workload!\n"); + goto out_put_evlist; + } + + evsel = evlist__first(evlist); + evsel->core.attr.task = 1; +#ifdef __s390x__ + evsel->core.attr.sample_freq = 1000000; +#else + evsel->core.attr.sample_freq = 1; +#endif + evsel->core.attr.inherit = 0; + evsel->core.attr.watermark = 0; + evsel->core.attr.wakeup_events = 1; + evsel->core.attr.exclude_kernel = 1; + + err = evlist__open(evlist); + if (err < 0) { + pr_debug("Couldn't open the evlist: %s\n", + str_error_r(-err, sbuf, sizeof(sbuf))); + goto out_put_evlist; + } + + if (evlist__do_mmap(evlist, 128) < 0) { + pr_debug("failed to mmap events: %d (%s)\n", errno, + str_error_r(errno, sbuf, sizeof(sbuf))); + err = -1; + goto out_put_evlist; + } + + evlist__start_workload(evlist); + +retry: + md = &evlist__mmap(evlist)[0]; + if (perf_mmap__read_init(&md->core) < 0) + goto out_init; + + while ((event = perf_mmap__read_event(&md->core)) != NULL) { + if (event->header.type == PERF_RECORD_EXIT) + nr_exit++; + + perf_mmap__consume(&md->core); + } + perf_mmap__read_done(&md->core); + +out_init: + if (!exited || !nr_exit) { + evlist__poll(evlist, -1); + + if (retry_count++ > 1000) { + pr_debug("Failed after retrying 1000 times\n"); + err = -1; + goto out_put_evlist; + } + + goto retry; + } + + if (nr_exit != 1) { + pr_debug("received %d EXIT records\n", nr_exit); + err = -1; + } + +out_put_evlist: + perf_cpu_map__put(cpus); + perf_thread_map__put(threads); + evlist__put(evlist); + return err; +} + +struct test_case tests__task_exit[] = { + TEST_CASE_EXCLUSIVE("Number of exit events of a simple workload", task_exit), + { .name = NULL, } +}; +struct test_suite suite__task_exit = { + .desc = "Number of exit events of a simple workload", + .test_cases = tests__task_exit, +}; -- cgit v1.3.1