[v4,08/15] xenpm: Change get-cpufreq-para output for hwp

Commit Message

Jason Andryuk June 14, 2023, 6:02 p.m. UTC

When using HWP, some of the returned data is not applicable.  In that
case, we should just omit it to avoid confusing the user.  So switch to
printing the base and max frequencies since those are relevant to HWP.
Similarly, stop printing the CPU frequencies since those do not apply.
The scaling fields are also no longer printed.

Signed-off-by: Jason Andryuk <[e-mail]>
---
v2:
Use full governor name XEN_HWP_GOVERNOR to change output
Style fixes

v4:
s/turbo/max/
Check for XEN_HWP_DRIVER driver instead of "-internal"
---
 tools/misc/xenpm.c | 83 +++++++++++++++++++++++++---------------------
 1 file changed, 46 insertions(+), 37 deletions(-)

Comments

Jan Beulich June 19, 2023, 11:50 a.m. UTC | #1

On 14.06.2023 20:02, Jason Andryuk wrote:
> When using HWP, some of the returned data is not applicable.  In that
> case, we should just omit it to avoid confusing the user.  So switch to
> printing the base and max frequencies since those are relevant to HWP.
> Similarly, stop printing the CPU frequencies since those do not apply.
> The scaling fields are also no longer printed.
> 
> Signed-off-by: Jason Andryuk <[e-mail]>

Acked-by: Jan Beulich <[e-mail]>

Patch

diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c
index 1c474c3b59..4e53e68dc5 100644
--- a/tools/misc/xenpm.c
+++ b/tools/misc/xenpm.c
@@ -711,6 +711,7 @@  void start_gather_func(int argc, char *argv[])
 /* print out parameters about cpu frequency */
 static void print_cpufreq_para(int cpuid, struct xc_get_cpufreq_para *p_cpufreq)
 {
+    bool hwp = strcmp(p_cpufreq->scaling_driver, XEN_HWP_DRIVER) == 0;
     int i;
 
     printf("cpu id               : %d\n", cpuid);
@@ -720,49 +721,57 @@  static void print_cpufreq_para(int cpuid, struct xc_get_cpufreq_para *p_cpufreq)
         printf(" %d", p_cpufreq->affected_cpus[i]);
     printf("\n");
 
-    printf("cpuinfo frequency    : max [%u] min [%u] cur [%u]\n",
-           p_cpufreq->cpuinfo_max_freq,
-           p_cpufreq->cpuinfo_min_freq,
-           p_cpufreq->cpuinfo_cur_freq);
+    if ( hwp )
+        printf("cpuinfo frequency    : base [%u] max [%u]\n",
+               p_cpufreq->cpuinfo_min_freq,
+               p_cpufreq->cpuinfo_max_freq);
+    else
+        printf("cpuinfo frequency    : max [%u] min [%u] cur [%u]\n",
+               p_cpufreq->cpuinfo_max_freq,
+               p_cpufreq->cpuinfo_min_freq,
+               p_cpufreq->cpuinfo_cur_freq);
 
     printf("scaling_driver       : %s\n", p_cpufreq->scaling_driver);
 
-    printf("scaling_avail_gov    : %s\n",
-           p_cpufreq->scaling_available_governors);
-
-    printf("current_governor     : %s\n", p_cpufreq->u.s.scaling_governor);
-    if ( !strncmp(p_cpufreq->u.s.scaling_governor,
-                  "userspace", CPUFREQ_NAME_LEN) )
-    {
-        printf("  userspace specific :\n");
-        printf("    scaling_setspeed : %u\n",
-               p_cpufreq->u.s.u.userspace.scaling_setspeed);
-    }
-    else if ( !strncmp(p_cpufreq->u.s.scaling_governor,
-                       "ondemand", CPUFREQ_NAME_LEN) )
+    if ( !hwp )
     {
-        printf("  ondemand specific  :\n");
-        printf("    sampling_rate    : max [%u] min [%u] cur [%u]\n",
-               p_cpufreq->u.s.u.ondemand.sampling_rate_max,
-               p_cpufreq->u.s.u.ondemand.sampling_rate_min,
-               p_cpufreq->u.s.u.ondemand.sampling_rate);
-        printf("    up_threshold     : %u\n",
-               p_cpufreq->u.s.u.ondemand.up_threshold);
-    }
+        printf("scaling_avail_gov    : %s\n",
+               p_cpufreq->scaling_available_governors);
 
-    printf("scaling_avail_freq   :");
-    for ( i = 0; i < p_cpufreq->freq_num; i++ )
-        if ( p_cpufreq->scaling_available_frequencies[i] ==
-             p_cpufreq->u.s.scaling_cur_freq )
-            printf(" *%d", p_cpufreq->scaling_available_frequencies[i]);
-        else
-            printf(" %d", p_cpufreq->scaling_available_frequencies[i]);
-    printf("\n");
+        printf("current_governor     : %s\n", p_cpufreq->u.s.scaling_governor);
+        if ( !strncmp(p_cpufreq->u.s.scaling_governor,
+                      "userspace", CPUFREQ_NAME_LEN) )
+        {
+            printf("  userspace specific :\n");
+            printf("    scaling_setspeed : %u\n",
+                   p_cpufreq->u.s.u.userspace.scaling_setspeed);
+        }
+        else if ( !strncmp(p_cpufreq->u.s.scaling_governor,
+                           "ondemand", CPUFREQ_NAME_LEN) )
+        {
+            printf("  ondemand specific  :\n");
+            printf("    sampling_rate    : max [%u] min [%u] cur [%u]\n",
+                   p_cpufreq->u.s.u.ondemand.sampling_rate_max,
+                   p_cpufreq->u.s.u.ondemand.sampling_rate_min,
+                   p_cpufreq->u.s.u.ondemand.sampling_rate);
+            printf("    up_threshold     : %u\n",
+                   p_cpufreq->u.s.u.ondemand.up_threshold);
+        }
+
+        printf("scaling_avail_freq   :");
+        for ( i = 0; i < p_cpufreq->freq_num; i++ )
+            if ( p_cpufreq->scaling_available_frequencies[i] ==
+                 p_cpufreq->u.s.scaling_cur_freq )
+                printf(" *%d", p_cpufreq->scaling_available_frequencies[i]);
+            else
+                printf(" %d", p_cpufreq->scaling_available_frequencies[i]);
+        printf("\n");
 
-    printf("scaling frequency    : max [%u] min [%u] cur [%u]\n",
-           p_cpufreq->u.s.scaling_max_freq,
-           p_cpufreq->u.s.scaling_min_freq,
-           p_cpufreq->u.s.scaling_cur_freq);
+        printf("scaling frequency    : max [%u] min [%u] cur [%u]\n",
+               p_cpufreq->u.s.scaling_max_freq,
+               p_cpufreq->u.s.scaling_min_freq,
+               p_cpufreq->u.s.scaling_cur_freq);
+    }
 
     printf("turbo mode           : %s\n",
            p_cpufreq->turbo_enabled ? "enabled" : "disabled or n/a");