diff mbox series

tools/power/turbostat: Fix uncore frequency file string

Message ID 20240308204957.2007212-1-justin.ernst@hpe.com (mailing list archive)
State Accepted, archived
Delegated to: Len Brown
Headers show
Series tools/power/turbostat: Fix uncore frequency file string | expand

Commit Message

Ernst, Justin March 8, 2024, 8:49 p.m. UTC
Running turbostat on a 16 socket HPE Scale-up Compute 3200 (SapphireRapids) fails with:
turbostat: /sys/devices/system/cpu/intel_uncore_frequency/package_010_die_00/current_freq_khz: open failed: No such file or directory

We observe the sysfs uncore frequency directories named:
...
package_09_die_00/
package_10_die_00/
package_11_die_00/
...
package_15_die_00/

The culprit is an incorrect sprintf format string "package_0%d_die_0%d" used
with each instance of reading uncore frequency files. uncore-frequency-common.c
creates the sysfs directory with the format "package_%02d_die_%02d". Once the
package value reaches double digits, the formats diverge.

Change each instance of "package_0%d_die_0%d" to "package_%02d_die_%02d".

Signed-off-by: Justin Ernst <justin.ernst@hpe.com>
---
 tools/power/x86/turbostat/turbostat.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

Comments

Thomas Renninger March 22, 2024, 12:38 p.m. UTC | #1
On Freitag, 8. März 2024 21:49:57 CET Justin Ernst wrote:
> Running turbostat on a 16 socket HPE Scale-up Compute 3200 (SapphireRapids)
> fails with: turbostat:
> /sys/devices/system/cpu/intel_uncore_frequency/package_010_die_00/current_f
> req_khz: open failed: No such file or directory
> 
> We observe the sysfs uncore frequency directories named:
> ...
> package_09_die_00/
> package_10_die_00/
> package_11_die_00/
> ...
> package_15_die_00/
> 
> The culprit is an incorrect sprintf format string "package_0%d_die_0%d" used
> with each instance of reading uncore frequency files.
> uncore-frequency-common.c creates the sysfs directory with the format
> "package_%02d_die_%02d". Once the package value reaches double digits, the
> formats diverge.
Yep, currently in:
drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
line 238.

Looks like the proper bugfix.
 
> Change each instance of "package_0%d_die_0%d" to "package_%02d_die_%02d".
> 
> Signed-off-by: Justin Ernst <justin.ernst@hpe.com>

Reviewed-by: Thomas Renninger <trenn@suse.de>

       Thomas
Len Brown April 2, 2024, 5:45 p.m. UTC | #2
Thanks for the patch, Justin,

Looks like the probe part of this was already fixed in my git tree, so
I lopped off that hunk and kept your 1st hunk.

Let me know if it works, or if I screwed it up.

latest is in this tree:
https://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git/

thanks,
-Len

On Fri, Mar 8, 2024 at 3:50 PM Justin Ernst <justin.ernst@hpe.com> wrote:
>
> Running turbostat on a 16 socket HPE Scale-up Compute 3200 (SapphireRapids) fails with:
> turbostat: /sys/devices/system/cpu/intel_uncore_frequency/package_010_die_00/current_freq_khz: open failed: No such file or directory
>
> We observe the sysfs uncore frequency directories named:
> ...
> package_09_die_00/
> package_10_die_00/
> package_11_die_00/
> ...
> package_15_die_00/
>
> The culprit is an incorrect sprintf format string "package_0%d_die_0%d" used
> with each instance of reading uncore frequency files. uncore-frequency-common.c
> creates the sysfs directory with the format "package_%02d_die_%02d". Once the
> package value reaches double digits, the formats diverge.
>
> Change each instance of "package_0%d_die_0%d" to "package_%02d_die_%02d".
>
> Signed-off-by: Justin Ernst <justin.ernst@hpe.com>
> ---
>  tools/power/x86/turbostat/turbostat.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
> index 7a334377f92b..2a15a23cb726 100644
> --- a/tools/power/x86/turbostat/turbostat.c
> +++ b/tools/power/x86/turbostat/turbostat.c
> @@ -2599,7 +2599,7 @@ unsigned long long get_uncore_mhz(int package, int die)
>  {
>         char path[128];
>
> -       sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/current_freq_khz", package,
> +       sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/current_freq_khz", package,
>                 die);
>
>         return (snapshot_sysfs_counter(path) / 1000);
> @@ -4589,20 +4589,20 @@ static void probe_intel_uncore_frequency(void)
>                 for (j = 0; j < topo.num_die; ++j) {
>                         int k, l;
>
> -                       sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/min_freq_khz",
> +                       sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/min_freq_khz",
>                                 i, j);
>                         k = read_sysfs_int(path);
> -                       sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/max_freq_khz",
> +                       sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/max_freq_khz",
>                                 i, j);
>                         l = read_sysfs_int(path);
>                         fprintf(outf, "Uncore Frequency pkg%d die%d: %d - %d MHz ", i, j, k / 1000, l / 1000);
>
>                         sprintf(path,
> -                               "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_min_freq_khz",
> +                               "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/initial_min_freq_khz",
>                                 i, j);
>                         k = read_sysfs_int(path);
>                         sprintf(path,
> -                               "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_max_freq_khz",
> +                               "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/initial_max_freq_khz",
>                                 i, j);
>                         l = read_sysfs_int(path);
>                         fprintf(outf, "(%d - %d MHz)\n", k / 1000, l / 1000);
> --
> 2.26.2
>
Ernst, Justin April 2, 2024, 6:57 p.m. UTC | #3
> From: Len Brown <lenb@kernel.org>
> Sent: Tuesday, April 2, 2024 12:46 PM
> 
> Thanks for the patch, Justin,
> 
> Looks like the probe part of this was already fixed in my git tree, so
> I lopped off that hunk and kept your 1st hunk.
> 
> Let me know if it works, or if I screwed it up.

It works! I tested on a 16-socket system with "..., package_10_die_00/, package_11_die_00/, etc" directories present.

Thanks for the link to your latest tree. It made it very easy to build and test your patch.

Cheers,
-Justin

> 
> latest is in this tree:
> https://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git/
> 
> thanks,
> -Len
> 
> On Fri, Mar 8, 2024 at 3:50 PM Justin Ernst <justin.ernst@hpe.com> wrote:
> >
> > Running turbostat on a 16 socket HPE Scale-up Compute 3200 (SapphireRapids) fails with:
> > turbostat: /sys/devices/system/cpu/intel_uncore_frequency/package_010_die_00/current_freq_khz: open
> failed: No such file or directory
> >
> > We observe the sysfs uncore frequency directories named:
> > ...
> > package_09_die_00/
> > package_10_die_00/
> > package_11_die_00/
> > ...
> > package_15_die_00/
> >
> > The culprit is an incorrect sprintf format string "package_0%d_die_0%d" used
> > with each instance of reading uncore frequency files. uncore-frequency-common.c
> > creates the sysfs directory with the format "package_%02d_die_%02d". Once the
> > package value reaches double digits, the formats diverge.
> >
> > Change each instance of "package_0%d_die_0%d" to "package_%02d_die_%02d".
> >
> > Signed-off-by: Justin Ernst <justin.ernst@hpe.com>
> > ---
> >  tools/power/x86/turbostat/turbostat.c | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
> > index 7a334377f92b..2a15a23cb726 100644
> > --- a/tools/power/x86/turbostat/turbostat.c
> > +++ b/tools/power/x86/turbostat/turbostat.c
> > @@ -2599,7 +2599,7 @@ unsigned long long get_uncore_mhz(int package, int die)
> >  {
> >         char path[128];
> >
> > -       sprintf(path,
> "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/current_freq_khz", package,
> > +       sprintf(path,
> "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/current_freq_khz", package,
> >                 die);
> >
> >         return (snapshot_sysfs_counter(path) / 1000);
> > @@ -4589,20 +4589,20 @@ static void probe_intel_uncore_frequency(void)
> >                 for (j = 0; j < topo.num_die; ++j) {
> >                         int k, l;
> >
> > -                       sprintf(path,
> "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/min_freq_khz",
> > +                       sprintf(path,
> "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/min_freq_khz",
> >                                 i, j);
> >                         k = read_sysfs_int(path);
> > -                       sprintf(path,
> "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/max_freq_khz",
> > +                       sprintf(path,
> "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/max_freq_khz",
> >                                 i, j);
> >                         l = read_sysfs_int(path);
> >                         fprintf(outf, "Uncore Frequency pkg%d die%d: %d - %d MHz ", i, j, k / 1000,
> l / 1000);
> >
> >                         sprintf(path,
> > -
> "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_min_freq_khz",
> > +
> "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/initial_min_freq_khz",
> >                                 i, j);
> >                         k = read_sysfs_int(path);
> >                         sprintf(path,
> > -
> "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_max_freq_khz",
> > +
> "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/initial_max_freq_khz",
> >                                 i, j);
> >                         l = read_sysfs_int(path);
> >                         fprintf(outf, "(%d - %d MHz)\n", k / 1000, l / 1000);
> > --
> > 2.26.2
> >
> 
> 
> --
> Len Brown, Intel
diff mbox series

Patch

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 7a334377f92b..2a15a23cb726 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -2599,7 +2599,7 @@  unsigned long long get_uncore_mhz(int package, int die)
 {
 	char path[128];
 
-	sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/current_freq_khz", package,
+	sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/current_freq_khz", package,
 		die);
 
 	return (snapshot_sysfs_counter(path) / 1000);
@@ -4589,20 +4589,20 @@  static void probe_intel_uncore_frequency(void)
 		for (j = 0; j < topo.num_die; ++j) {
 			int k, l;
 
-			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/min_freq_khz",
+			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/min_freq_khz",
 				i, j);
 			k = read_sysfs_int(path);
-			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/max_freq_khz",
+			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/max_freq_khz",
 				i, j);
 			l = read_sysfs_int(path);
 			fprintf(outf, "Uncore Frequency pkg%d die%d: %d - %d MHz ", i, j, k / 1000, l / 1000);
 
 			sprintf(path,
-				"/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_min_freq_khz",
+				"/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/initial_min_freq_khz",
 				i, j);
 			k = read_sysfs_int(path);
 			sprintf(path,
-				"/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_max_freq_khz",
+				"/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/initial_max_freq_khz",
 				i, j);
 			l = read_sysfs_int(path);
 			fprintf(outf, "(%d - %d MHz)\n", k / 1000, l / 1000);