97 lines
2.8 KiB
Diff
97 lines
2.8 KiB
Diff
--- cpuspeed-1.5/cpuspeed.cc.orig 2008-10-08 14:59:29.000000000 -0400
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+++ cpuspeed-1.5/cpuspeed.cc 2008-10-08 19:22:33.000000000 -0400
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@@ -159,6 +159,8 @@ unsigned last_step; // lowest speed step
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// which CPU cores are we controlling
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unsigned tied_cpu_cores[MAX_TIED_CORES];
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unsigned num_tied_cores = 0;
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+unsigned cpu = 0;
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+bool no_affected_cpus_attr = false;
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// display an error message and exit the program
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void
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@@ -485,12 +487,16 @@ get_times(
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if (nice_counts_as_idle)
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{
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idle_time += nice_time;
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+ } else {
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+ user_time += nice_time;
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}
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// count IO wait time as idle time
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if (io_counts_as_idle)
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{
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idle_time += wait_time;
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+ } else {
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+ user_time += wait_time;
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}
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unsigned long total_time = user_time + system_time + idle_time;
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@@ -711,6 +717,7 @@ unsigned num_cores = 0; // how many CPU
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// restore initial speed on program exit
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unsigned saved_speed = 0;
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char saved_governor[32];
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+pid_t * saved_pids;
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void
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term_handler(int which)
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@@ -721,6 +728,12 @@ term_handler(int which)
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write_line(GOVERNOR_FILE, "%s\n", saved_governor);
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}
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+ if (cpu == 0 && no_affected_cpus_attr)
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+ {
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+ for (unsigned i = 1; i < num_cores; i++)
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+ kill(saved_pids[i], which);
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+ }
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+
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raise(which);
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}
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@@ -1036,6 +1049,7 @@ main(int argc, char * argv[])
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// iterate through all cpu cores in main process
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for (unsigned i = 0, forked = 0; i < num_cores && !forked; i++)
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{
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+ int n;
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// does this core do cpufreq?
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char cpufreq_dir[256];
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snprintf(cpufreq_dir, sizeof cpufreq_dir, SYSFS_CPUFREQ_DIR, i);
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@@ -1067,7 +1081,14 @@ main(int argc, char * argv[])
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}
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#endif
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unsigned cores[MAX_TIED_CORES];
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- int n = read_values(acfn, cores, MAX_TIED_CORES);
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+ if (access(acfn, F_OK) != 0)
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+ {
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+ // fall back to the old 1.2.x method of forking for each core
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+ no_affected_cpus_attr = true;
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+ n = 1;
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+ }
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+ else
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+ n = read_values(acfn, cores, MAX_TIED_CORES);
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// if we can't figure out the affected cores
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if (n == 0)
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@@ -1102,8 +1123,22 @@ main(int argc, char * argv[])
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i, cores[0]
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);
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#endif
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+ if (no_affected_cpus_attr)
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+ break;
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}
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}
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+
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+ if (no_affected_cpus_attr)
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+ {
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+ saved_pids = (pid_t *)calloc(num_cores, sizeof(pid_t));
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+
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+ // fork() a process to handle each core
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+ for (unsigned i = 1; i < num_cores; i++)
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+ if ( !(saved_pids[i] = fork())) {
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+ cpu = i;
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+ break;
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+ }
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+ }
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}
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