+++ /dev/null
-/*
- * trace-collection.c
- *
- * Babeltrace Library
- *
- * Copyright 2012 EfficiOS Inc. and Linux Foundation
- *
- * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-#include <babeltrace/babeltrace.h>
-#include <babeltrace/format.h>
-#include <babeltrace/context.h>
-#include <babeltrace/ctf/types.h>
-#include <babeltrace/ctf-text/types.h>
-#include <babeltrace/trace-collection.h>
-#include <babeltrace/ctf-ir/metadata.h> /* for clocks */
-#include <babeltrace/clock-internal.h>
-
-#include <inttypes.h>
-
-struct clock_match {
- GHashTable *clocks;
- struct ctf_clock *clock_match;
- struct trace_collection *tc;
-};
-
-static void check_clock_match(gpointer key, gpointer value, gpointer user_data)
-{
- struct clock_match *match = user_data;
- struct ctf_clock *clock_a = value, *clock_b;
-
- if (clock_a->absolute) {
- /*
- * Absolute time references, such as NTP, are looked up
- * by clock name.
- */
- clock_b = g_hash_table_lookup(match->clocks,
- GUINT_TO_POINTER(clock_a->name));
- if (clock_b) {
- match->clock_match = clock_b;
- return;
- }
- } else if (clock_a->uuid != 0) {
- /*
- * Lookup the the trace clocks into the collection
- * clocks.
- */
- clock_b = g_hash_table_lookup(match->clocks,
- GUINT_TO_POINTER(clock_a->uuid));
- if (clock_b) {
- match->clock_match = clock_b;
- return;
- }
- }
-}
-
-static void clock_add(gpointer key, gpointer value, gpointer user_data)
-{
- struct clock_match *clock_match = user_data;
- GHashTable *tc_clocks = clock_match->clocks;
- struct ctf_clock *t_clock = value;
- GQuark v;
-
- if (t_clock->absolute)
- v = t_clock->name;
- else
- v = t_clock->uuid;
- if (v) {
- struct ctf_clock *tc_clock;
-
- tc_clock = g_hash_table_lookup(tc_clocks,
- GUINT_TO_POINTER(v));
- if (!tc_clock) {
- /*
- * For now we only support CTF that has one
- * single clock uuid or name (absolute ref) per
- * trace.
- */
- if (g_hash_table_size(tc_clocks) > 0) {
- fprintf(stderr, "[error] Only CTF traces with a single clock description are supported by this babeltrace version.\n");
- }
- if (!clock_match->tc->offset_nr) {
- clock_match->tc->offset_first = clock_offset_ns(t_clock);
- clock_match->tc->delta_offset_first_sum = 0;
- clock_match->tc->offset_nr++;
- clock_match->tc->single_clock_offset_avg =
- clock_match->tc->offset_first;
- }
- g_hash_table_insert(tc_clocks,
- GUINT_TO_POINTER(v),
- value);
- } else if (!t_clock->absolute) {
- int64_t diff_ns;
-
- /*
- * For non-absolute clocks, check that the
- * offsets match. If not, warn the user that we
- * do an arbitrary choice.
- */
- diff_ns = clock_offset_ns(tc_clock) - clock_offset_ns(t_clock);
- printf_debug("Clock \"%s\" offset between traces has a delta of %" PRIu64 " ns.",
- g_quark_to_string(tc_clock->name),
- diff_ns < 0 ? -diff_ns : diff_ns);
- if (diff_ns > 10000 || diff_ns < -10000) {
- fprintf(stderr, "[warning] Clock \"%s\" offset differs between traces (delta %" PRIu64 " ns). Using average.\n",
- g_quark_to_string(tc_clock->name),
- diff_ns < 0 ? -diff_ns : diff_ns);
- }
- /* Compute average */
- clock_match->tc->delta_offset_first_sum +=
- clock_offset_ns(t_clock) - clock_match->tc->offset_first;
- clock_match->tc->offset_nr++;
- clock_match->tc->single_clock_offset_avg =
- clock_match->tc->offset_first
- + (clock_match->tc->delta_offset_first_sum / clock_match->tc->offset_nr);
- /* Time need to use offset average */
- clock_match->tc->clock_use_offset_avg = 1;
- }
- }
-}
-
-/*
- * Whenever we add a trace to the trace collection, check that we can
- * correlate this trace with at least one other clock in the trace and
- * convert the index from cycles to real time.
- */
-int bt_trace_collection_add(struct trace_collection *tc,
- struct bt_trace_descriptor *trace)
-{
- if (!tc || !trace)
- return -EINVAL;
-
- if (!trace->clocks)
- return 0;
-
- if (tc->array->len > 1) {
- struct clock_match clock_match = {
- .clocks = tc->clocks,
- .clock_match = NULL,
- .tc = NULL,
- };
-
- /*
- * With two or more traces, we need correlation info
- * avalable.
- */
- g_hash_table_foreach(trace->clocks,
- check_clock_match,
- &clock_match);
- if (!clock_match.clock_match) {
- fprintf(stderr, "[error] No clocks can be correlated and multiple traces are added to the collection. If you are certain those traces can be correlated, try using \"--clock-force-correlate\".\n");
- goto error;
- }
- }
-
- g_ptr_array_add(tc->array, trace);
- trace->collection = tc;
-
- {
- struct clock_match clock_match = {
- .clocks = tc->clocks,
- .clock_match = NULL,
- .tc = tc,
- };
-
- /*
- * Add each clock from the trace clocks into the trace
- * collection clocks.
- */
- g_hash_table_foreach(trace->clocks,
- clock_add,
- &clock_match);
- }
-
- return 0;
-error:
- return -EPERM;
-}
-
-int bt_trace_collection_remove(struct trace_collection *tc,
- struct bt_trace_descriptor *td)
-{
- if (!tc || !td)
- return -EINVAL;
-
- if (g_ptr_array_remove(tc->array, td)) {
- return 0;
- } else {
- return -1;
- }
-
-}
-
-void bt_init_trace_collection(struct trace_collection *tc)
-{
- assert(tc);
- tc->array = g_ptr_array_new();
- tc->clocks = g_hash_table_new(g_direct_hash, g_direct_equal);
- tc->single_clock_offset_avg = 0;
- tc->offset_first = 0;
- tc->delta_offset_first_sum = 0;
- tc->offset_nr = 0;
-}
-
-/*
- * bt_finalize_trace_collection() closes the opened traces for read
- * and free the memory allocated for trace collection
- */
-void bt_finalize_trace_collection(struct trace_collection *tc)
-{
- assert(tc);
- g_ptr_array_free(tc->array, TRUE);
- g_hash_table_destroy(tc->clocks);
-}
projects / babeltrace.git / blobdiff