src/os/linux/vm/os_linux.cpp

Print this page
rev 6352 : imported patch 8031126-threadusertime

*** 5269,5279 **** // // -1 on error. // static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { - static bool proc_task_unchecked = true; pid_t tid = thread->osthread()->thread_id(); char *s; char stat[2048]; int statlen; char proc_name[64]; --- 5269,5278 ----
*** 5282,5309 **** char cdummy; int idummy; long ldummy; FILE *fp; - snprintf(proc_name, 64, "/proc/%d/stat", tid); - - // The /proc/<tid>/stat aggregates per-process usage on - // new Linux kernels 2.6+ where NPTL is supported. - // The /proc/self/task/<tid>/stat still has the per-thread usage. - // See bug 6328462. - // There possibly can be cases where there is no directory - // /proc/self/task, so we check its availability. - if (proc_task_unchecked && os::Linux::is_NPTL()) { - // This is executed only once - proc_task_unchecked = false; - fp = fopen("/proc/self/task", "r"); - if (fp != NULL) { snprintf(proc_name, 64, "/proc/self/task/%d/stat", tid); - fclose(fp); - } - } - fp = fopen(proc_name, "r"); if ( fp == NULL ) return -1; statlen = fread(stat, 1, 2047, fp); stat[statlen] = '\0'; fclose(fp); --- 5281,5291 ----