From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- tools/perf/tests/sw-clock.c | 152 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 tools/perf/tests/sw-clock.c (limited to 'tools/perf/tests/sw-clock.c') diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c new file mode 100644 index 000000000..b6e469753 --- /dev/null +++ b/tools/perf/tests/sw-clock.c @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include + +#include "tests.h" +#include "util/debug.h" +#include "util/evsel.h" +#include "util/evlist.h" +#include "util/cpumap.h" +#include "util/mmap.h" +#include "util/sample.h" +#include "util/thread_map.h" +#include +#include + +#define NR_LOOPS 10000000 + +/* + * This test will open software clock events (cpu-clock, task-clock) + * then check their frequency -> period conversion has no artifact of + * setting period to 1 forcefully. + */ +static int __test__sw_clock_freq(enum perf_sw_ids clock_id) +{ + int i, err = -1; + volatile int tmp __maybe_unused = 0; + u64 total_periods = 0; + int nr_samples = 0; + char sbuf[STRERR_BUFSIZE]; + union perf_event *event; + struct evsel *evsel; + struct evlist *evlist; + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .config = clock_id, + .sample_type = PERF_SAMPLE_PERIOD, + .exclude_kernel = 1, + .disabled = 1, + .freq = 1, + }; + struct perf_cpu_map *cpus = NULL; + struct perf_thread_map *threads = NULL; + struct mmap *md; + + attr.sample_freq = 500; + + evlist = evlist__new(); + if (evlist == NULL) { + pr_debug("evlist__new\n"); + return -1; + } + + evsel = evsel__new(&attr); + if (evsel == NULL) { + pr_debug("evsel__new\n"); + goto out_delete_evlist; + } + evlist__add(evlist, evsel); + + cpus = perf_cpu_map__new_any_cpu(); + threads = thread_map__new_by_tid(getpid()); + if (!cpus || !threads) { + err = -ENOMEM; + pr_debug("Not enough memory to create thread/cpu maps\n"); + goto out_delete_evlist; + } + + perf_evlist__set_maps(&evlist->core, cpus, threads); + + if (evlist__open(evlist)) { + const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate"; + + err = -errno; + pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n", + str_error_r(errno, sbuf, sizeof(sbuf)), + knob, (u64)attr.sample_freq); + goto out_delete_evlist; + } + + err = evlist__mmap(evlist, 128); + if (err < 0) { + pr_debug("failed to mmap event: %d (%s)\n", errno, + str_error_r(errno, sbuf, sizeof(sbuf))); + goto out_delete_evlist; + } + + evlist__enable(evlist); + + /* collect samples */ + for (i = 0; i < NR_LOOPS; i++) + tmp++; + + evlist__disable(evlist); + + md = &evlist->mmap[0]; + if (perf_mmap__read_init(&md->core) < 0) + goto out_init; + + while ((event = perf_mmap__read_event(&md->core)) != NULL) { + struct perf_sample sample; + + perf_sample__init(&sample, /*all=*/false); + if (event->header.type != PERF_RECORD_SAMPLE) + goto next_event; + + err = evlist__parse_sample(evlist, event, &sample); + if (err < 0) { + pr_debug("Error during parse sample\n"); + perf_sample__exit(&sample); + goto out_delete_evlist; + } + + total_periods += sample.period; + nr_samples++; +next_event: + perf_mmap__consume(&md->core); + perf_sample__exit(&sample); + } + perf_mmap__read_done(&md->core); + +out_init: + if ((u64) nr_samples == total_periods) { + pr_debug("All (%d) samples have period value of 1!\n", + nr_samples); + err = -1; + } + +out_delete_evlist: + perf_cpu_map__put(cpus); + perf_thread_map__put(threads); + evlist__delete(evlist); + return err; +} + +static int test__sw_clock_freq(struct test_suite *test __maybe_unused, int subtest __maybe_unused) +{ + int ret; + + ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK); + if (!ret) + ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK); + + return ret; +} + +DEFINE_SUITE("Software clock events period values", sw_clock_freq); -- cgit v1.3.1