b2108839b0
Stopwatch (in the way it is used) must be able to measure the wall clock time with high resolution but used clock() which is not appropriate for this purpose: On POSIX systems clock() returns the processor time used by the program. On Windows clock() does measure the wall clock time but has only a resolution of 1ms (if at all). This also renders the freerdp profiler unusable. This commit changes stopwatch to use the performance counters on Windows and gettimeofday() for the rest. Also added a warning about invalid profiling results to the RemoteFX codec if rfxcontext->priv->UseThreads is enabled because stopwatch is currently not used in a thread safe way. Also see GitHub Issue #1325
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Stopwatch Utils
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*
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* Copyright 2011 Stephen Erisman
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <freerdp/utils/stopwatch.h>
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#ifdef _WIN32
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LARGE_INTEGER stopwatch_freq = { 0, 0 };
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#else
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#include <sys/time.h>
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#endif
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void stopwatch_set_time(UINT64* usecs)
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{
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#ifdef _WIN32
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LARGE_INTEGER perfcount;
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QueryPerformanceCounter(&perfcount);
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*usecs = (perfcount.QuadPart * 1000000) / stopwatch_freq.QuadPart;
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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*usecs = tv.tv_sec * 1000000 + tv.tv_usec;
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#endif
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}
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STOPWATCH* stopwatch_create()
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{
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STOPWATCH* sw;
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#ifdef _WIN32
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if (stopwatch_freq.QuadPart == 0) {
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QueryPerformanceFrequency(&stopwatch_freq);
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}
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#endif
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sw = (STOPWATCH*) malloc(sizeof(STOPWATCH));
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stopwatch_reset(sw);
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return sw;
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}
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void stopwatch_free(STOPWATCH* stopwatch)
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{
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free(stopwatch);
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}
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void stopwatch_start(STOPWATCH* stopwatch)
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{
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stopwatch_set_time(&stopwatch->start);
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stopwatch->count++;
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}
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void stopwatch_stop(STOPWATCH* stopwatch)
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{
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stopwatch_set_time(&stopwatch->end);
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stopwatch->elapsed += (stopwatch->end - stopwatch->start);
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}
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void stopwatch_reset(STOPWATCH* stopwatch)
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{
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stopwatch->start = 0;
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stopwatch->end = 0;
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stopwatch->elapsed = 0;
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stopwatch->count = 0;
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}
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double stopwatch_get_elapsed_time_in_seconds(STOPWATCH* stopwatch)
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{
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return (stopwatch->elapsed/1000000.0);
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}
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void stopwatch_get_elapsed_time_in_useconds(STOPWATCH* stopwatch, UINT32* sec, UINT32* usec)
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{
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*sec = stopwatch->elapsed / 1000000;
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*usec = stopwatch->elapsed % 1000000;
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}
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