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Diffstat (limited to 'tools/power/x86/turbostat/turbostat.c')
-rw-r--r--tools/power/x86/turbostat/turbostat.c107
1 files changed, 38 insertions, 69 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index de634c8228b..c8cce5dcc82 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -23,6 +23,7 @@
#include MSRHEADER
#include <stdarg.h>
#include <stdio.h>
+#include <err.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
@@ -624,12 +625,10 @@ delta_thread(struct thread_data *new, struct thread_data *old,
old->tsc = new->tsc - old->tsc;
/* check for TSC < 1 Mcycles over interval */
- if (old->tsc < (1000 * 1000)) {
- fprintf(stderr, "Insanely slow TSC rate, TSC stops in idle?\n");
- fprintf(stderr, "You can disable all c-states by booting with \"idle=poll\"\n");
- fprintf(stderr, "or just the deep ones with \"processor.max_cstate=1\"\n");
- exit(-3);
- }
+ if (old->tsc < (1000 * 1000))
+ errx(-3, "Insanely slow TSC rate, TSC stops in idle?\n"
+ "You can disable all c-states by booting with \"idle=poll\"\n"
+ "or just the deep ones with \"processor.max_cstate=1\"");
old->c1 = new->c1 - old->c1;
@@ -1180,10 +1179,8 @@ void free_all_buffers(void)
FILE *fopen_or_die(const char *path, const char *mode)
{
FILE *filep = fopen(path, "r");
- if (!filep) {
- perror(path);
- exit(1);
- }
+ if (!filep)
+ err(1, "%s: open failed", path);
return filep;
}
@@ -1201,10 +1198,8 @@ int parse_int_file(const char *fmt, ...)
vsnprintf(path, sizeof(path), fmt, args);
va_end(args);
filep = fopen_or_die(path, "r");
- if (fscanf(filep, "%d", &value) != 1) {
- perror(path);
- exit(1);
- }
+ if (fscanf(filep, "%d", &value) != 1)
+ err(1, "%s: failed to parse number from file", path);
fclose(filep);
return value;
}
@@ -1319,10 +1314,8 @@ int for_all_proc_cpus(int (func)(int))
fp = fopen_or_die(proc_stat, "r");
retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n");
- if (retval != 0) {
- perror("/proc/stat format");
- exit(1);
- }
+ if (retval != 0)
+ err(1, "%s: failed to parse format", proc_stat);
while (1) {
retval = fscanf(fp, "cpu%u %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n", &cpu_num);
@@ -1426,19 +1419,15 @@ void check_dev_msr()
{
struct stat sb;
- if (stat("/dev/cpu/0/msr", &sb)) {
- fprintf(stderr, "no /dev/cpu/0/msr\n");
- fprintf(stderr, "Try \"# modprobe msr\"\n");
- exit(-5);
- }
+ if (stat("/dev/cpu/0/msr", &sb))
+ err(-5, "no /dev/cpu/0/msr\n"
+ "Try \"# modprobe msr\"");
}
void check_super_user()
{
- if (getuid() != 0) {
- fprintf(stderr, "must be root\n");
- exit(-6);
- }
+ if (getuid() != 0)
+ errx(-6, "must be root");
}
int has_nehalem_turbo_ratio_limit(unsigned int family, unsigned int model)
@@ -1979,10 +1968,8 @@ void check_cpuid()
fprintf(stderr, "%d CPUID levels; family:model:stepping 0x%x:%x:%x (%d:%d:%d)\n",
max_level, family, model, stepping, family, model, stepping);
- if (!(edx & (1 << 5))) {
- fprintf(stderr, "CPUID: no MSR\n");
- exit(1);
- }
+ if (!(edx & (1 << 5)))
+ errx(1, "CPUID: no MSR");
/*
* check max extended function levels of CPUID.
@@ -1992,10 +1979,8 @@ void check_cpuid()
ebx = ecx = edx = 0;
__get_cpuid(0x80000000, &max_level, &ebx, &ecx, &edx);
- if (max_level < 0x80000007) {
- fprintf(stderr, "CPUID: no invariant TSC (max_level 0x%x)\n", max_level);
- exit(1);
- }
+ if (max_level < 0x80000007)
+ errx(1, "CPUID: no invariant TSC (max_level 0x%x)", max_level);
/*
* Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8
@@ -2004,10 +1989,8 @@ void check_cpuid()
__get_cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
has_invariant_tsc = edx & (1 << 8);
- if (!has_invariant_tsc) {
- fprintf(stderr, "No invariant TSC\n");
- exit(1);
- }
+ if (!has_invariant_tsc)
+ errx(1, "No invariant TSC");
/*
* APERF/MPERF is advertised by CPUID.EAX=0x6: ECX.bit0
@@ -2028,7 +2011,7 @@ void check_cpuid()
has_epb ? ", EPB": "");
if (!has_aperf)
- exit(-1);
+ errx(-1, "No APERF");
do_nehalem_platform_info = genuine_intel && has_invariant_tsc;
do_nhm_cstates = genuine_intel; /* all Intel w/ non-stop TSC have NHM counters */
@@ -2048,9 +2031,8 @@ void check_cpuid()
void usage()
{
- fprintf(stderr, "%s: [-v][-R][-T][-p|-P|-S][-c MSR# | -s]][-C MSR#][-m MSR#][-M MSR#][-i interval_sec | command ...]\n",
- progname);
- exit(1);
+ errx(1, "%s: [-v][-R][-T][-p|-P|-S][-c MSR# | -s]][-C MSR#][-m MSR#][-M MSR#][-i interval_sec | command ...]\n",
+ progname);
}
@@ -2093,19 +2075,15 @@ void topology_probe()
fprintf(stderr, "num_cpus %d max_cpu_num %d\n", topo.num_cpus, topo.max_cpu_num);
cpus = calloc(1, (topo.max_cpu_num + 1) * sizeof(struct cpu_topology));
- if (cpus == NULL) {
- perror("calloc cpus");
- exit(1);
- }
+ if (cpus == NULL)
+ err(1, "calloc cpus");
/*
* Allocate and initialize cpu_present_set
*/
cpu_present_set = CPU_ALLOC((topo.max_cpu_num + 1));
- if (cpu_present_set == NULL) {
- perror("CPU_ALLOC");
- exit(3);
- }
+ if (cpu_present_set == NULL)
+ err(3, "CPU_ALLOC");
cpu_present_setsize = CPU_ALLOC_SIZE((topo.max_cpu_num + 1));
CPU_ZERO_S(cpu_present_setsize, cpu_present_set);
for_all_proc_cpus(mark_cpu_present);
@@ -2114,10 +2092,8 @@ void topology_probe()
* Allocate and initialize cpu_affinity_set
*/
cpu_affinity_set = CPU_ALLOC((topo.max_cpu_num + 1));
- if (cpu_affinity_set == NULL) {
- perror("CPU_ALLOC");
- exit(3);
- }
+ if (cpu_affinity_set == NULL)
+ err(3, "CPU_ALLOC");
cpu_affinity_setsize = CPU_ALLOC_SIZE((topo.max_cpu_num + 1));
CPU_ZERO_S(cpu_affinity_setsize, cpu_affinity_set);
@@ -2201,8 +2177,7 @@ allocate_counters(struct thread_data **t, struct core_data **c, struct pkg_data
return;
error:
- perror("calloc counters");
- exit(1);
+ err(1, "calloc counters");
}
/*
* init_counter()
@@ -2259,10 +2234,8 @@ void allocate_output_buffer()
{
output_buffer = calloc(1, (1 + topo.num_cpus) * 256);
outp = output_buffer;
- if (outp == NULL) {
- perror("calloc");
- exit(-1);
- }
+ if (outp == NULL)
+ err(-1, "calloc output buffer");
}
void setup_all_buffers(void)
@@ -2316,17 +2289,13 @@ int fork_it(char **argv)
} else {
/* parent */
- if (child_pid == -1) {
- perror("fork");
- exit(1);
- }
+ if (child_pid == -1)
+ err(1, "fork");
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
- if (waitpid(child_pid, &status, 0) == -1) {
- perror("wait");
- exit(status);
- }
+ if (waitpid(child_pid, &status, 0) == -1)
+ err(status, "waitpid");
}
/*
* n.b. fork_it() does not check for errors from for_all_cpus()
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-22 17:49:15 +0000