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plasma: do not enlarge the pixmap cache size

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this needs a config knob like the theme cache size

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2023-07-04 17:51:13 +03:00
parent 547ccac0f8
commit 2f5c1e72ef
1 changed files with 0 additions and 86 deletions
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86
plasma/shells/plasma-desktop/plasmaapp.cpp
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@ -20,24 +20,8 @@
#include "plasmaapp.h"
#include <unistd.h>
#ifndef _SC_PHYS_PAGES
#if defined(Q_OS_FREEBSD) || defined(Q_OS_DRAGONFLY)
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
#ifdef Q_OS_NETBSD
#include <sys/param.h>
#include <sys/sysctl.h>
#endif
#endif
#include <QApplication>
#include <QDesktopWidget>
#include <QPixmapCache>
#include <QtDBus/QtDBus>
#include <QElapsedTimer>
#include <QTimer>
@ -156,76 +140,6 @@ PlasmaApp::PlasmaApp()
new PlasmaAppAdaptor(this);
QDBusConnection::sessionBus().registerObject("/App", this);
// Enlarge application pixmap cache
// Calculate the size required to hold background pixmaps for all screens.
// Add 10% so that other (smaller) pixmaps can also be cached.
int cacheSize = 0;
if (KGlobalSettings::isMultiHead()) {
int id = 0;
#ifdef Q_WS_X11
Display *dpy = XOpenDisplay(NULL);
if (dpy) {
id = DefaultScreen(dpy);
XCloseDisplay(dpy);
}
#endif
const QSize size = QApplication::desktop()->screenGeometry(id).size();
cacheSize += 4 * size.width() * size.height() / 1024;
} else {
for (int i = 0; i < QApplication::desktop()->screenCount(); i++) {
QSize size = QApplication::desktop()->screenGeometry(i).size();
cacheSize += 4 * size.width() * size.height() / 1024;
}
}
cacheSize += cacheSize / 10;
// Calculate the size of physical system memory; _SC_PHYS_PAGES *
// _SC_PAGESIZE is documented to be able to overflow 32-bit integers,
// so apply a 10-bit shift. FreeBSD 6-STABLE doesn't have _SC_PHYS_PAGES
// (it is documented in FreeBSD 7-STABLE as "Solaris and Linux extension")
// so use sysctl in those cases.
#if defined(_SC_PHYS_PAGES)
int memorySize = sysconf(_SC_PHYS_PAGES);
memorySize *= sysconf(_SC_PAGESIZE) / 1024;
#else
#ifdef Q_OS_FREEBSD || defined(Q_OS_DRAGONFLY)
int sysctlbuf[2];
size_t size = sizeof(sysctlbuf);
int memorySize;
// This could actually use hw.physmem instead, but I can't find
// reliable documentation on how to read the value (which may
// not fit in a 32 bit integer).
if (!sysctlbyname("vm.stats.vm.v_page_size", sysctlbuf, &size, NULL, 0)) {
memorySize = sysctlbuf[0] / 1024;
size = sizeof(sysctlbuf);
if (!sysctlbyname("vm.stats.vm.v_page_count", sysctlbuf, &size, NULL, 0)) {
memorySize *= sysctlbuf[0];
}
}
#endif
#ifdef Q_OS_NETBSD
size_t memorySize;
size_t len;
static int mib[] = { CTL_HW, HW_PHYSMEM };
len = sizeof(memorySize);
sysctl(mib, 2, &memorySize, &len, NULL, 0);
memorySize /= 1024;
#endif
// If you have no suitable sysconf() interface and are not FreeBSD,
// then you are out of luck and get a compile error.
#endif
// Increase the pixmap cache size to 1% of system memory if it isn't already
// larger so as to maximize cache usage. 1% of 1GB ~= 10MB.
if (cacheSize < memorySize / 100) {
cacheSize = memorySize / 100;
}
kDebug() << "Setting the pixmap cache size to" << cacheSize << "kilobytes";
QPixmapCache::setCacheLimit(cacheSize);
KGlobal::setAllowQuit(true);
KGlobal::ref();