diff options
Diffstat (limited to 'src/os/linux/vm/os_linux.cpp')
| -rw-r--r-- | src/os/linux/vm/os_linux.cpp | 28 |
1 files changed, 2 insertions, 26 deletions
diff --git a/src/os/linux/vm/os_linux.cpp b/src/os/linux/vm/os_linux.cpp index 74c237fdf..9f09507e6 100644 --- a/src/os/linux/vm/os_linux.cpp +++ b/src/os/linux/vm/os_linux.cpp @@ -4743,49 +4743,26 @@ jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { // static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { - static bool proc_pid_cpu_avail = true; static bool proc_task_unchecked = true; static const char *proc_stat_path = "/proc/%d/stat"; pid_t tid = thread->osthread()->thread_id(); - int i; char *s; char stat[2048]; int statlen; char proc_name[64]; int count; long sys_time, user_time; - char string[64]; char cdummy; int idummy; long ldummy; FILE *fp; - // We first try accessing /proc/<pid>/cpu since this is faster to - // process. If this file is not present (linux kernels 2.5 and above) - // then we open /proc/<pid>/stat. - if ( proc_pid_cpu_avail ) { - sprintf(proc_name, "/proc/%d/cpu", tid); - fp = fopen(proc_name, "r"); - if ( fp != NULL ) { - count = fscanf( fp, "%s %lu %lu\n", string, &user_time, &sys_time); - fclose(fp); - if ( count != 3 ) return -1; - - if (user_sys_cpu_time) { - return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); - } else { - return (jlong)user_time * (1000000000 / clock_tics_per_sec); - } - } - else proc_pid_cpu_avail = false; - } - // 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 can be no directory /proc/self/task on kernels 2.4 with NPTL - // and possibly in some other cases, so we check its availability. + // 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; @@ -4810,7 +4787,6 @@ static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { // We don't really need to know the command string, just find the last // occurrence of ")" and then start parsing from there. See bug 4726580. s = strrchr(stat, ')'); - i = 0; if (s == NULL ) return -1; // Skip blank chars |