![]() ![]() Monitor system resources on Oracle Linux Introduction When completing your lab, substitute these values with ones specific to your cloud environment. It uses example values for Oracle Cloud Infrastructure credentials, tenancy, and compartments.This tutorial is available in an Oracle-provided free lab environment.Usage size_t currentSize = getCurrentRSS( ) įor more discussion, check the web site, it also provides a function to get the physical memory size of a system. * AIX, BSD, Solaris, and Unknown OS - */ Return (size_t)rss * (size_t)sysconf( _SC_PAGESIZE) If ( (fp = fopen( "/proc/self/statm", "r" )) = NULL ) (task_info_t)&info, &infoCount ) != KERN_SUCCESS ) If ( task_info( mach_task_self( ), MACH_TASK_BASIC_INFO, Mach_msg_type_number_t infoCount = MACH_TASK_BASIC_INFO_COUNT * in bytes, or zero if the value cannot be determined on this OS. * Returns the current resident set size (physical memory use) measured Return (size_t)(psinfo.pr_rssize * 1024L) If ( read( fd, &psinfo, sizeof(psinfo) ) != sizeof(psinfo) ) If ( (fd = open( "/proc/self/psinfo", O_RDONLY )) = -1 ) GetProcessMemoryInfo( GetCurrentProcess( ), &info, sizeof(info) ) * memory use) measured in bytes, or zero if the value cannot be * Returns the peak (maximum so far) resident set size (physical #error "Cannot define getPeakRSS( ) or getCurrentRSS( ) for an unknown OS." #elif defined(_linux_) || defined(_linux) || defined(linux) || defined(_gnu_linux_) #elif defined(_unix_) || defined(_unix) || defined(unix) || (defined(_APPLE_) & defined(_MACH_)) ![]() * License: Creative Commons Attribution 3.0 Unported License Long page_size_kb = sysconf(_SC_PAGE_SIZE) / 1024 // in case x86-64 is configured to use 2MB pagesĬout << "VM: " << vm << " RSS: " << rss << endl ĭavid Robert Nadeau has put a good self contained multi-platform C function to get the process resident set size (physical memory use) in his website: /* ![]() > O > itrealvalue > starttime > vsize > rss // don't care about the rest > utime > stime > cutime > cstime > priority > nice > tpgid > flags > minflt > cminflt > majflt > cmajflt Stat_stream > pid > comm > state > ppid > pgrp > session > tty_nr String utime, stime, cutime, cstime, priority, nice String tpgid, flags, minflt, cminflt, majflt, cmajflt String pid, comm, state, ppid, pgrp, session, tty_nr dummy vars for leading entries in stat that we don't care about Ifstream stat_stream("/proc/self/stat",ios_base::in) 'file' stat seems to give the most reliable results Void process_mem_usage(double& vm_usage, double& resident_set) size and resident set size, and return the results in KB. attempts to read the system-dependent data for a process' virtual memory process_mem_usage(double &, double &) - takes two doubles by reference, Here's the one we settled on (the question was tagged C++, and we handled I/O using C++ constructs, but it should be easily adaptable to C i/o routines if you need to): #include There are a number of these files which give differing results. For our applications, we coded a general utility routine based on reading files in /proc/pid. On Linux, I've never found an ioctl() solution.
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