From: Jason Andryuk <jandryuk@gmail.com>
To: xen-devel@lists.xenproject.org
Cc: Jason Andryuk <jandryuk@gmail.com>, Wei Liu <wl@xen.org>,
Anthony PERARD <anthony.perard@citrix.com>
Subject: [PATCH v2 08/13] xenpm: Print HWP parameters
Date: Wed, 10 Aug 2022 15:29:39 -0400 [thread overview]
Message-ID: <20220810192944.102135-9-jandryuk@gmail.com> (raw)
In-Reply-To: <20220810192944.102135-1-jandryuk@gmail.com>
Print HWP-specific parameters. Some are always present, but others
depend on hardware support.
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
---
v2:
Style fixes
Declare i outside loop
Replace repearted hardware/configured limits with spaces
Fixup for hw_ removal
Use XEN_HWP_GOVERNOR
Use HWP_ACT_WINDOW_EXPONENT_*
Remove energy_perf hw autonomous - 0 doesn't mean autonomous
---
tools/misc/xenpm.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c
index 179f9f1f96..610a516213 100644
--- a/tools/misc/xenpm.c
+++ b/tools/misc/xenpm.c
@@ -708,6 +708,44 @@ void start_gather_func(int argc, char *argv[])
pause();
}
+static void calculate_hwp_activity_window(const xc_hwp_para_t *hwp,
+ unsigned int *activity_window,
+ const char **units)
+{
+ unsigned int mantissa = hwp->activity_window & HWP_ACT_WINDOW_MANTISSA_MASK;
+ unsigned int exponent =
+ (hwp->activity_window >> HWP_ACT_WINDOW_EXPONENT_SHIFT) &
+ HWP_ACT_WINDOW_EXPONENT_MASK;
+ unsigned int multiplier = 1;
+ unsigned int i;
+
+ if ( hwp->activity_window == 0 )
+ {
+ *units = "hardware selected";
+ *activity_window = 0;
+
+ return;
+ }
+
+ if ( exponent >= 6 )
+ {
+ *units = "s";
+ exponent -= 6;
+ }
+ else if ( exponent >= 3 )
+ {
+ *units = "ms";
+ exponent -= 3;
+ }
+ else
+ *units = "us";
+
+ for ( i = 0; i < exponent; i++ )
+ multiplier *= 10;
+
+ *activity_window = mantissa * multiplier;
+}
+
/* print out parameters about cpu frequency */
static void print_cpufreq_para(int cpuid, struct xc_get_cpufreq_para *p_cpufreq)
{
@@ -773,6 +811,33 @@ static void print_cpufreq_para(int cpuid, struct xc_get_cpufreq_para *p_cpufreq)
p_cpufreq->scaling_cur_freq);
}
+ if ( strcmp(p_cpufreq->scaling_governor, XEN_HWP_GOVERNOR) == 0 )
+ {
+ const xc_hwp_para_t *hwp = &p_cpufreq->u.hwp_para;
+
+ printf("hwp variables :\n");
+ printf(" hardware limits : lowest [%u] most_efficient [%u]\n",
+ hwp->lowest, hwp->most_efficient);
+ printf(" : guaranteed [%u] highest [%u]\n",
+ hwp->guaranteed, hwp->highest);
+ printf(" configured limits : min [%u] max [%u] energy_perf [%u]\n",
+ hwp->minimum, hwp->maximum, hwp->energy_perf);
+
+ if ( hwp->features & XEN_SYSCTL_HWP_FEAT_ACT_WINDOW )
+ {
+ unsigned int activity_window;
+ const char *units;
+
+ calculate_hwp_activity_window(hwp, &activity_window, &units);
+ printf(" : activity_window [%u %s]\n",
+ activity_window, units);
+ }
+
+ printf(" : desired [%u%s]\n",
+ hwp->desired,
+ hwp->desired ? "" : " hw autonomous");
+ }
+
printf("turbo mode : %s\n",
p_cpufreq->turbo_enabled ? "enabled" : "disabled or n/a");
printf("\n");
--
2.37.1
next prev parent reply other threads:[~2022-08-10 19:30 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-10 19:29 [PATCH v2 00/13] Intel Hardware P-States (HWP) support Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 01/13] cpufreq: Allow restricting to internal governors only Jason Andryuk
2022-08-15 14:22 ` Jan Beulich
2022-08-15 14:47 ` Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 02/13] cpufreq: Add perf_freq to cpuinfo Jason Andryuk
2022-08-15 14:29 ` Jan Beulich
2022-08-10 19:29 ` [PATCH v2 03/13] cpufreq: Export intel_feature_detect Jason Andryuk
2022-08-15 14:34 ` Jan Beulich
2022-08-15 14:58 ` Jason Andryuk
2022-08-15 15:23 ` Jan Beulich
2022-08-10 19:29 ` [PATCH v2 04/13] cpufreq: Add Hardware P-State (HWP) driver Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 05/13] xenpm: Change get-cpufreq-para output for internal Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 06/13] cpufreq: Export HWP parameters to userspace Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 07/13] libxc: Include hwp_para in definitions Jason Andryuk
2022-08-10 19:29 ` Jason Andryuk [this message]
2022-08-10 19:29 ` [PATCH v2 09/13] xen: Add SET_CPUFREQ_HWP xen_sysctl_pm_op Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 10/13] libxc: Add xc_set_cpufreq_hwp Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 11/13] xenpm: Factor out a non-fatal cpuid_parse variant Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 12/13] xenpm: Add set-cpufreq-hwp subcommand Jason Andryuk
2022-08-10 19:29 ` [PATCH v2 13/13] CHANGELOG: Add Intel HWP entry Jason Andryuk
2022-08-11 1:56 ` Henry Wang
2022-08-11 6:51 ` Jan Beulich
2022-08-11 11:30 ` Jason Andryuk
2022-08-11 12:16 ` Henry Wang
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