tools/power turbostat: show GFX%rc6

The column "GFX%c6" show the percentage of time the GPU
is in the "render C6" state, rc6.  Deep package C-states on several
systems depend on the GPU being in RC6.

This information comes from the counter
/sys/class/drm/card0/power/rc6_residency_ms,
as read before and after the measurement interval.

Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index d599f91318442230b1172b747946c78be246617e..9896619e4382b456ba01b7b543eeccaa881d5b20 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -90,6 +90,8 @@ char *output_buffer, *outp;
 unsigned int do_rapl;
 unsigned int do_dts;
 unsigned int do_ptm;
+unsigned int do_gfx_rc6_ms;
+unsigned long long  gfx_cur_rc6_ms;
 unsigned int do_gfx_mhz;
 unsigned int gfx_cur_mhz;
 unsigned int tcc_activation_temp;
@@ -185,6 +187,7 @@ struct pkg_data {
        unsigned long long pkg_any_core_c0;
        unsigned long long pkg_any_gfxe_c0;
        unsigned long long pkg_both_core_gfxe_c0;
+       unsigned long long gfx_rc6_ms;
        unsigned int gfx_mhz;
        unsigned int package_id;
        unsigned int energy_pkg;        /* MSR_PKG_ENERGY_STATUS */
@@ -365,6 +368,9 @@ void print_header(void)
        if (do_ptm)
                outp += sprintf(outp, "  PkgTmp");
 
+       if (do_gfx_rc6_ms)
+               outp += sprintf(outp, " GFX%%rc6");
+
        if (do_gfx_mhz)
                outp += sprintf(outp, "  GFXMHz");
 
@@ -614,6 +620,10 @@ int format_counters(struct thread_data *t, struct core_data *c,
        if (do_ptm)
                outp += sprintf(outp, "%8d", p->pkg_temp_c);
 
+       /* GFXrc6 */
+       if (do_gfx_rc6_ms)
+               outp += sprintf(outp, "%8.2f", 100.0 * p->gfx_rc6_ms / 1000.0 / interval_float);
+
        /* GFXMHz */
        if (do_gfx_mhz)
                outp += sprintf(outp, "%8d", p->gfx_mhz);
@@ -756,6 +766,7 @@ delta_package(struct pkg_data *new, struct pkg_data *old)
        old->pc10 = new->pc10 - old->pc10;
        old->pkg_temp_c = new->pkg_temp_c;
 
+       old->gfx_rc6_ms = new->gfx_rc6_ms - old->gfx_rc6_ms;
        old->gfx_mhz = new->gfx_mhz;
 
        DELTA_WRAP32(new->energy_pkg, old->energy_pkg);
@@ -922,6 +933,7 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
        p->rapl_dram_perf_status = 0;
        p->pkg_temp_c = 0;
 
+       p->gfx_rc6_ms = 0;
        p->gfx_mhz = 0;
 }
 int sum_counters(struct thread_data *t, struct core_data *c,
@@ -975,6 +987,7 @@ int sum_counters(struct thread_data *t, struct core_data *c,
        average.packages.energy_cores += p->energy_cores;
        average.packages.energy_gfx += p->energy_gfx;
 
+       average.packages.gfx_rc6_ms = p->gfx_rc6_ms;
        average.packages.gfx_mhz = p->gfx_mhz;
 
        average.packages.pkg_temp_c = MAX(average.packages.pkg_temp_c, p->pkg_temp_c);
@@ -1192,6 +1205,10 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
                        return -17;
                p->pkg_temp_c = tcc_activation_temp - ((msr >> 16) & 0x7F);
        }
+
+       if (do_gfx_rc6_ms)
+               p->gfx_rc6_ms = gfx_cur_rc6_ms;
+
        if (do_gfx_mhz)
                p->gfx_mhz = gfx_cur_mhz;
 
@@ -1844,6 +1861,29 @@ int snapshot_proc_interrupts(void)
        }
        return 0;
 }
+/*
+ * snapshot_gfx_rc6_ms()
+ *
+ * record snapshot of
+ * /sys/class/drm/card0/power/rc6_residency_ms
+ *
+ * return 1 if config change requires a restart, else return 0
+ */
+int snapshot_gfx_rc6_ms(void)
+{
+       FILE *fp;
+       int retval;
+
+       fp = fopen_or_die("/sys/class/drm/card0/power/rc6_residency_ms", "r");
+
+       retval = fscanf(fp, "%lld", &gfx_cur_rc6_ms);
+       if (retval != 1)
+               err(1, "GFX rc6");
+
+       fclose(fp);
+
+       return 0;
+}
 /*
  * snapshot_gfx_mhz()
  *
@@ -1879,6 +1919,9 @@ int snapshot_proc_sysfs_files(void)
        if (snapshot_proc_interrupts())
                return 1;
 
+       if (do_gfx_rc6_ms)
+               snapshot_gfx_rc6_ms();
+
        if (do_gfx_mhz)
                snapshot_gfx_mhz();
 
@@ -3157,6 +3200,8 @@ void process_cpuid()
        if (has_skl_msrs(family, model))
                calculate_tsc_tweak();
 
+       do_gfx_rc6_ms = !access("/sys/class/drm/card0/power/rc6_residency_ms", R_OK);
+
        do_gfx_mhz = !access("/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz", R_OK);
 
        return;