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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/lib/traceevent/plugins/plugin_sched_switch.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/lib/traceevent/plugins/plugin_sched_switch.c')
-rw-r--r-- | tools/lib/traceevent/plugins/plugin_sched_switch.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/tools/lib/traceevent/plugins/plugin_sched_switch.c b/tools/lib/traceevent/plugins/plugin_sched_switch.c new file mode 100644 index 000000000..e12fa1038 --- /dev/null +++ b/tools/lib/traceevent/plugins/plugin_sched_switch.c @@ -0,0 +1,146 @@ +// SPDX-License-Identifier: LGPL-2.1 +/* + * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "event-parse.h" +#include "trace-seq.h" + +static void write_state(struct trace_seq *s, int val) +{ + const char states[] = "SDTtZXxW"; + int found = 0; + int i; + + for (i = 0; i < (sizeof(states) - 1); i++) { + if (!(val & (1 << i))) + continue; + + if (found) + trace_seq_putc(s, '|'); + + found = 1; + trace_seq_putc(s, states[i]); + } + + if (!found) + trace_seq_putc(s, 'R'); +} + +static void write_and_save_comm(struct tep_format_field *field, + struct tep_record *record, + struct trace_seq *s, int pid) +{ + const char *comm; + int len; + + comm = (char *)(record->data + field->offset); + len = s->len; + trace_seq_printf(s, "%.*s", + field->size, comm); + + /* make sure the comm has a \0 at the end. */ + trace_seq_terminate(s); + comm = &s->buffer[len]; + + /* Help out the comm to ids. This will handle dups */ + tep_register_comm(field->event->tep, comm, pid); +} + +static int sched_wakeup_handler(struct trace_seq *s, + struct tep_record *record, + struct tep_event *event, void *context) +{ + struct tep_format_field *field; + unsigned long long val; + + if (tep_get_field_val(s, event, "pid", record, &val, 1)) + return trace_seq_putc(s, '!'); + + field = tep_find_any_field(event, "comm"); + if (field) { + write_and_save_comm(field, record, s, val); + trace_seq_putc(s, ':'); + } + trace_seq_printf(s, "%lld", val); + + if (tep_get_field_val(s, event, "prio", record, &val, 0) == 0) + trace_seq_printf(s, " [%lld]", val); + + if (tep_get_field_val(s, event, "success", record, &val, 1) == 0) + trace_seq_printf(s, " success=%lld", val); + + if (tep_get_field_val(s, event, "target_cpu", record, &val, 0) == 0) + trace_seq_printf(s, " CPU:%03llu", val); + + return 0; +} + +static int sched_switch_handler(struct trace_seq *s, + struct tep_record *record, + struct tep_event *event, void *context) +{ + struct tep_format_field *field; + unsigned long long val; + + if (tep_get_field_val(s, event, "prev_pid", record, &val, 1)) + return trace_seq_putc(s, '!'); + + field = tep_find_any_field(event, "prev_comm"); + if (field) { + write_and_save_comm(field, record, s, val); + trace_seq_putc(s, ':'); + } + trace_seq_printf(s, "%lld ", val); + + if (tep_get_field_val(s, event, "prev_prio", record, &val, 0) == 0) + trace_seq_printf(s, "[%d] ", (int) val); + + if (tep_get_field_val(s, event, "prev_state", record, &val, 0) == 0) + write_state(s, val); + + trace_seq_puts(s, " ==> "); + + if (tep_get_field_val(s, event, "next_pid", record, &val, 1)) + return trace_seq_putc(s, '!'); + + field = tep_find_any_field(event, "next_comm"); + if (field) { + write_and_save_comm(field, record, s, val); + trace_seq_putc(s, ':'); + } + trace_seq_printf(s, "%lld", val); + + if (tep_get_field_val(s, event, "next_prio", record, &val, 0) == 0) + trace_seq_printf(s, " [%d]", (int) val); + + return 0; +} + +int TEP_PLUGIN_LOADER(struct tep_handle *tep) +{ + tep_register_event_handler(tep, -1, "sched", "sched_switch", + sched_switch_handler, NULL); + + tep_register_event_handler(tep, -1, "sched", "sched_wakeup", + sched_wakeup_handler, NULL); + + tep_register_event_handler(tep, -1, "sched", "sched_wakeup_new", + sched_wakeup_handler, NULL); + return 0; +} + +void TEP_PLUGIN_UNLOADER(struct tep_handle *tep) +{ + tep_unregister_event_handler(tep, -1, "sched", "sched_switch", + sched_switch_handler, NULL); + + tep_unregister_event_handler(tep, -1, "sched", "sched_wakeup", + sched_wakeup_handler, NULL); + + tep_unregister_event_handler(tep, -1, "sched", "sched_wakeup_new", + sched_wakeup_handler, NULL); +} |