trace_osnoise.c (498627b4ac85780b9962ed9b5c5abbefd884ef8e) trace_osnoise.c (19c3eaa72288ce161441dd6b74b765a094d73488)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * OS Noise Tracer: computes the OS Noise suffered by a running thread.
4 * Timerlat Tracer: measures the wakeup latency of a timer triggered IRQ and thread.
5 *
6 * Based on "hwlat_detector" tracer by:
7 * Copyright (C) 2008-2009 Jon Masters, Red Hat, Inc. <jcm@redhat.com>
8 * Copyright (C) 2013-2016 Steven Rostedt, Red Hat, Inc. <srostedt@redhat.com>

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1037 * Used to capture the time, looking for potential osnoise latency repeatedly.
1038 * Different from hwlat_detector, it is called with preemption and interrupts
1039 * enabled. This allows irqs, softirqs and threads to run, interfering on the
1040 * osnoise sampling thread, as they would do with a regular thread.
1041 */
1042static int run_osnoise(void)
1043{
1044 struct osnoise_variables *osn_var = this_cpu_osn_var();
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * OS Noise Tracer: computes the OS Noise suffered by a running thread.
4 * Timerlat Tracer: measures the wakeup latency of a timer triggered IRQ and thread.
5 *
6 * Based on "hwlat_detector" tracer by:
7 * Copyright (C) 2008-2009 Jon Masters, Red Hat, Inc. <jcm@redhat.com>
8 * Copyright (C) 2013-2016 Steven Rostedt, Red Hat, Inc. <srostedt@redhat.com>

--- 1028 unchanged lines hidden (view full) ---

1037 * Used to capture the time, looking for potential osnoise latency repeatedly.
1038 * Different from hwlat_detector, it is called with preemption and interrupts
1039 * enabled. This allows irqs, softirqs and threads to run, interfering on the
1040 * osnoise sampling thread, as they would do with a regular thread.
1041 */
1042static int run_osnoise(void)
1043{
1044 struct osnoise_variables *osn_var = this_cpu_osn_var();
1045 u64 noise = 0, sum_noise = 0, max_noise = 0;
1046 struct trace_array *tr = osnoise_trace;
1047 u64 start, sample, last_sample;
1048 u64 last_int_count, int_count;
1045 struct trace_array *tr = osnoise_trace;
1046 u64 start, sample, last_sample;
1047 u64 last_int_count, int_count;
1048 s64 noise = 0, max_noise = 0;
1049 s64 total, last_total = 0;
1050 struct osnoise_sample s;
1051 unsigned int threshold;
1049 s64 total, last_total = 0;
1050 struct osnoise_sample s;
1051 unsigned int threshold;
1052 int hw_count = 0;
1053 u64 runtime, stop_in;
1052 u64 runtime, stop_in;
1053 u64 sum_noise = 0;
1054 int hw_count = 0;
1054 int ret = -1;
1055
1056 /*
1057 * Considers the current thread as the workload.
1058 */
1059 osn_var->pid = current->pid;
1060
1061 /*

--- 997 unchanged lines hidden --- 		1055 int ret = -1;
1056
1057 /*
1058 * Considers the current thread as the workload.
1059 */
1060 osn_var->pid = current->pid;
1061
1062 /*

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