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Date: Wed, 1 Mar 2017 00:27:34 -0500
From: Len Brown <lenb@...nel.org>
To: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>
Subject: [PATCH 30/44] tools/power turbostat: extend --add option to accept /sys path
From: Len Brown <len.brown@...el.com>
Previously, the --add option could specify only an MSR.
Here is is extended so an arbitrary /sys attribute,
as specified by an absolute file path name.
sudo ./turbostat --add /sys/devices/system/cpu/cpu0/cpuidle/state5/usage
Signed-off-by: Len Brown <len.brown@...el.com>
---
tools/power/x86/turbostat/turbostat.c | 92 ++++++++++++++++++++++++++---------
1 file changed, 69 insertions(+), 23 deletions(-)
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 334c4c29d4b5..841f837e317f 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -138,6 +138,7 @@ unsigned int has_misc_feature_control;
* Usually truncated to 7 characters, but also handles 18 columns for raw 64-bit counters
*/
#define NAME_BYTES 20
+#define PATH_BYTES 128
int backwards_count;
char *progname;
@@ -213,6 +214,7 @@ enum counter_format {FORMAT_RAW, FORMAT_DELTA, FORMAT_PERCENT};
struct msr_counter {
unsigned int msr_num;
char name[NAME_BYTES];
+ char path[PATH_BYTES];
unsigned int width;
enum counter_type type;
enum counter_format format;
@@ -344,7 +346,7 @@ struct msr_counter bic[] = {
{ 0x0, "Bzy_MHz" },
{ 0x0, "TSC_MHz" },
{ 0x0, "IRQ" },
- { 0x0, "SMI", 32, 0, FORMAT_DELTA, NULL},
+ { 0x0, "SMI", "", 32, 0, FORMAT_DELTA, NULL},
{ 0x0, "Busy%" },
{ 0x0, "CPU%c1" },
{ 0x0, "CPU%c3" },
@@ -1308,6 +1310,51 @@ static unsigned long long rdtsc(void)
}
/*
+ * Open a file, and exit on failure
+ */
+FILE *fopen_or_die(const char *path, const char *mode)
+{
+ FILE *filep = fopen(path, mode);
+
+ if (!filep)
+ err(1, "%s: open failed", path);
+ return filep;
+}
+/*
+ * snapshot_sysfs_counter()
+ *
+ * return snapshot of given counter
+ */
+unsigned long long snapshot_sysfs_counter(char *path)
+{
+ FILE *fp;
+ int retval;
+ unsigned long long counter;
+
+ fp = fopen_or_die(path, "r");
+
+ retval = fscanf(fp, "%lld", &counter);
+ if (retval != 1)
+ err(1, "snapshot_sysfs_counter(%s)", path);
+
+ fclose(fp);
+
+ return counter;
+}
+
+int get_mp(int cpu, struct msr_counter *mp, unsigned long long *counterp)
+{
+ if (mp->msr_num != 0) {
+ if (get_msr(cpu, mp->msr_num, counterp))
+ return -1;
+ } else {
+ *counterp = snapshot_sysfs_counter(mp->path);
+ }
+
+ return 0;
+}
+
+/*
* get_counters(...)
* migrate to cpu
* acquire and record local counters for that cpu
@@ -1397,11 +1444,10 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
}
for (i = 0, mp = sys.tp; mp; i++, mp = mp->next) {
- if (get_msr(cpu, mp->msr_num, &t->counter[i]))
+ if (get_mp(cpu, mp, &t->counter[i]))
return -10;
}
-
/* collect core counters only for 1st thread in core */
if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
return 0;
@@ -1434,7 +1480,7 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
}
for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
- if (get_msr(cpu, mp->msr_num, &c->counter[i]))
+ if (get_mp(cpu, mp, &c->counter[i]))
return -10;
}
@@ -1524,7 +1570,7 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
p->gfx_mhz = gfx_cur_mhz;
for (i = 0, mp = sys.pp; mp; i++, mp = mp->next) {
- if (get_msr(cpu, mp->msr_num, &p->counter[i]))
+ if (get_mp(cpu, mp, &p->counter[i]))
return -10;
}
@@ -2013,16 +2059,6 @@ void free_all_buffers(void)
free(irqs_per_cpu);
}
-/*
- * Open a file, and exit on failure
- */
-FILE *fopen_or_die(const char *path, const char *mode)
-{
- FILE *filep = fopen(path, mode);
- if (!filep)
- err(1, "%s: open failed", path);
- return filep;
-}
/*
* Parse a file containing a single int.
@@ -2581,7 +2617,7 @@ int probe_nhm_msrs(unsigned int family, unsigned int model)
return 1;
}
/*
- * SLV client has supporet for unique MSRs:
+ * SLV client has support for unique MSRs:
*
* MSR_CC6_DEMOTION_POLICY_CONFIG
* MSR_MC6_DEMOTION_POLICY_CONFIG
@@ -4342,9 +4378,9 @@ void print_version() {
" - Len Brown <lenb@...nel.org>\n");
}
-int add_counter(unsigned int msr_num, char *name, unsigned int width,
- enum counter_scope scope, enum counter_type type,
- enum counter_format format)
+int add_counter(unsigned int msr_num, char *path, char *name,
+ unsigned int width, enum counter_scope scope,
+ enum counter_type type, enum counter_format format)
{
struct msr_counter *msrp;
@@ -4356,6 +4392,8 @@ int add_counter(unsigned int msr_num, char *name, unsigned int width,
msrp->msr_num = msr_num;
strncpy(msrp->name, name, NAME_BYTES);
+ if (path)
+ strncpy(msrp->path, path, PATH_BYTES);
msrp->width = width;
msrp->type = type;
msrp->format = format;
@@ -4402,6 +4440,7 @@ int add_counter(unsigned int msr_num, char *name, unsigned int width,
void parse_add_command(char *add_command)
{
int msr_num = 0;
+ char *path = NULL;
char name_buffer[NAME_BYTES] = "";
int width = 64;
int fail = 0;
@@ -4417,6 +4456,11 @@ void parse_add_command(char *add_command)
if (sscanf(add_command, "msr%d", &msr_num) == 1)
goto next;
+ if (*add_command == '/') {
+ path = add_command;
+ goto next;
+ }
+
if (sscanf(add_command, "u%d", &width) == 1) {
if ((width == 32) || (width == 64))
goto next;
@@ -4466,12 +4510,14 @@ void parse_add_command(char *add_command)
next:
add_command = strchr(add_command, ',');
- if (add_command)
+ if (add_command) {
+ *add_command = '\0';
add_command++;
+ }
}
- if (msr_num == 0) {
- fprintf(stderr, "--add: (msrDDD | msr0xXXX) required\n");
+ if ((msr_num == 0) && (path == NULL)) {
+ fprintf(stderr, "--add: (msrDDD | msr0xXXX | /path_to_counter ) required\n");
fail++;
}
@@ -4495,7 +4541,7 @@ void parse_add_command(char *add_command)
}
}
- if (add_counter(msr_num, name_buffer, width, scope, type, format))
+ if (add_counter(msr_num, path, name_buffer, width, scope, type, format))
fail++;
if (fail) {
--
2.11.0.161.g6610af872
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