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/*
* Copyright (C) 2017 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ResourceUsageThread.h"
#if ENABLE(RESOURCE_USAGE) && OS(LINUX)
#include <errno.h>
#include <fcntl.h>
#include <heap/GCActivityCallback.h>
#include <runtime/VM.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <wtf/linux/CurrentProcessMemoryStatus.h>
namespace WebCore {
static float cpuPeriod()
{
FILE* file = fopen("/proc/stat", "r");
if (!file)
return 0;
static const unsigned statMaxLineLength = 512;
char buffer[statMaxLineLength + 1];
char* line = fgets(buffer, statMaxLineLength, file);
if (!line) {
fclose(file);
return 0;
}
unsigned long long userTime, niceTime, systemTime, idleTime;
unsigned long long ioWait, irq, softIrq, steal, guest, guestnice;
ioWait = irq = softIrq = steal = guest = guestnice = 0;
sscanf(buffer, "cpu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu",
&userTime, &niceTime, &systemTime, &idleTime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
// Keep parsing if we still don't know cpuCount.
static unsigned cpuCount = 0;
if (!cpuCount) {
while ((line = fgets(buffer, statMaxLineLength, file))) {
if (strlen(line) > 4 && line[0] == 'c' && line[1] == 'p' && line[2] == 'u')
cpuCount++;
else
break;
}
}
fclose(file);
if (!cpuCount)
return 0;
static unsigned long long previousTotalTime = 0;
unsigned long long totalTime = userTime + niceTime + systemTime + irq + softIrq + idleTime + ioWait + steal;
unsigned long long period = totalTime > previousTotalTime ? totalTime - previousTotalTime : 0;
previousTotalTime = totalTime;
return static_cast<float>(period) / cpuCount;
}
static float cpuUsage()
{
float period = cpuPeriod();
if (!period)
return -1;
int fd = open("/proc/self/stat", O_RDONLY);
if (fd < 0)
return -1;
static const ssize_t maxBufferLength = BUFSIZ - 1;
char buffer[BUFSIZ];
buffer[0] = '\0';
ssize_t totalBytesRead = 0;
while (totalBytesRead < maxBufferLength) {
ssize_t bytesRead = read(fd, buffer + totalBytesRead, maxBufferLength - totalBytesRead);
if (bytesRead < 0) {
if (errno != EINTR) {
close(fd);
return -1;
}
continue;
}
if (!bytesRead)
break;
totalBytesRead += bytesRead;
}
close(fd);
buffer[totalBytesRead] = '\0';
// Skip pid and process name.
char* position = strrchr(buffer, ')');
if (!position)
return -1;
// Move after state.
position += 4;
// Skip ppid, pgrp, sid, tty_nr, tty_pgrp, flags, min_flt, cmin_flt, maj_flt, cmaj_flt.
unsigned tokensToSkip = 10;
while (tokensToSkip--) {
while (!isASCIISpace(position[0]))
position++;
position++;
}
static unsigned long long previousUtime = 0;
static unsigned long long previousStime = 0;
unsigned long long utime = strtoull(position, &position, 10);
unsigned long long stime = strtoull(position, &position, 10);
float usage = (utime + stime - (previousUtime + previousStime)) / period * 100.0;
previousUtime = utime;
previousStime = stime;
return clampTo<float>(usage, 0, 100);
}
void ResourceUsageThread::platformThreadBody(JSC::VM* vm, ResourceUsageData& data)
{
data.cpu = cpuUsage();
ProcessMemoryStatus memoryStatus;
currentProcessMemoryStatus(memoryStatus);
data.totalDirtySize = memoryStatus.resident - memoryStatus.shared;
size_t currentGCHeapCapacity = vm->heap.blockBytesAllocated();
size_t currentGCOwnedExtra = vm->heap.extraMemorySize();
size_t currentGCOwnedExternal = vm->heap.externalMemorySize();
RELEASE_ASSERT(currentGCOwnedExternal <= currentGCOwnedExtra);
data.categories[MemoryCategory::GCHeap].dirtySize = currentGCHeapCapacity;
data.categories[MemoryCategory::GCOwned].dirtySize = currentGCOwnedExtra - currentGCOwnedExternal;
data.categories[MemoryCategory::GCOwned].externalSize = currentGCOwnedExternal;
data.totalExternalSize = currentGCOwnedExternal;
data.timeOfNextEdenCollection = vm->heap.edenActivityCallback()->nextFireTime();
data.timeOfNextFullCollection = vm->heap.fullActivityCallback()->nextFireTime();
}
} // namespace WebCore
#endif // ENABLE(RESOURCE_USAGE) && OS(LINUX)
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