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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 9/9] x86/intel_pstate: enable xenpm to control the intel_pstate driver
The intel_pstate driver receives percentage values to set the
performance limits. This patch adds interfaces to support the
input of percentage values to control the intel_pstate driver.
Also, the "get-cpufreq-para" is modified to show percentage
based feedback info.
Signed-off-by: Wei Wang <wei.w.wang@xxxxxxxxx>
---
tools/libxc/include/xenctrl.h | 20 +++++++--
tools/libxc/xc_pm.c | 26 ++++++-----
tools/misc/xenpm.c | 101 ++++++++++++++++++++++++++++++++----------
3 files changed, 110 insertions(+), 37 deletions(-)
diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 02d0db8..e390a77 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2200,9 +2200,13 @@ typedef xen_ondemand_t xc_ondemand_t;
struct xc_get_cpufreq_para {
/* IN/OUT variable */
uint32_t cpu_num;
- uint32_t freq_num;
uint32_t gov_num;
+ union {
+ uint32_t freq_num;
+ uint32_t pstates_num;
+ } num;
+
/* for all governors */
/* OUT variable */
uint32_t *affected_cpus;
@@ -2216,8 +2220,18 @@ struct xc_get_cpufreq_para {
uint32_t scaling_cur_freq;
char scaling_governor[CPUFREQ_NAME_LEN];
- uint32_t scaling_max_freq;
- uint32_t scaling_min_freq;
+
+ union {
+ uint32_t max_freq;
+ int32_t max_perf_pct;
+ } scaling_max;
+
+ union {
+ uint32_t min_freq;
+ int32_t min_perf_pct;
+ } scaling_min;
+
+ int32_t scaling_turbo_pct;
/* for specific governor */
union {
diff --git a/tools/libxc/xc_pm.c b/tools/libxc/xc_pm.c
index d116c36..24e8779 100644
--- a/tools/libxc/xc_pm.c
+++ b/tools/libxc/xc_pm.c
@@ -207,13 +207,13 @@ int xc_get_cpufreq_para(xc_interface *xch, int cpuid,
user_para->cpu_num * sizeof(uint32_t),
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
DECLARE_NAMED_HYPERCALL_BOUNCE(scaling_available_frequencies,
user_para->scaling_available_frequencies,
- user_para->freq_num * sizeof(uint32_t),
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+ user_para->num.freq_num * sizeof(uint32_t),
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
DECLARE_NAMED_HYPERCALL_BOUNCE(scaling_available_governors,
user_para->scaling_available_governors,
user_para->gov_num * CPUFREQ_NAME_LEN * sizeof(char),
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
bool has_num = user_para->cpu_num &&
- user_para->freq_num &&
+ user_para->num.freq_num &&
user_para->gov_num;
if ( has_num )
@@ -241,7 +241,7 @@ int xc_get_cpufreq_para(xc_interface *xch, int cpuid,
sysctl.u.pm_op.cmd = GET_CPUFREQ_PARA;
sysctl.u.pm_op.cpuid = cpuid;
sys_para->cpu_num = user_para->cpu_num;
- sys_para->num.freq_num = user_para->freq_num;
+ sys_para->num.freq_num = user_para->num.freq_num;
sys_para->gov_num = user_para->gov_num;
ret = xc_sysctl(xch, &sysctl);
@@ -250,7 +250,7 @@ int xc_get_cpufreq_para(xc_interface *xch, int cpuid,
if ( errno == EAGAIN )
{
user_para->cpu_num = sys_para->cpu_num;
- user_para->freq_num = sys_para->num.freq_num;
+ user_para->num.freq_num = sys_para->num.freq_num;
user_para->gov_num = sys_para->gov_num;
ret = -errno;
}
@@ -261,13 +261,17 @@ int xc_get_cpufreq_para(xc_interface *xch, int cpuid,
}
else
{
- user_para->cpuinfo_cur_freq = sys_para->cpuinfo_cur_freq;
- user_para->cpuinfo_max_freq = sys_para->cpuinfo_max_freq;
- user_para->cpuinfo_min_freq = sys_para->cpuinfo_min_freq;
- user_para->scaling_cur_freq = sys_para->scaling_cur_freq;
- user_para->scaling_max_freq = sys_para->scaling_max.max_freq;
- user_para->scaling_min_freq = sys_para->scaling_min.min_freq;
- user_para->turbo_enabled = sys_para->turbo_enabled;
+ user_para->cpuinfo_cur_freq = sys_para->cpuinfo_cur_freq;
+ user_para->cpuinfo_max_freq = sys_para->cpuinfo_max_freq;
+ user_para->cpuinfo_min_freq = sys_para->cpuinfo_min_freq;
+ user_para->scaling_cur_freq = sys_para->scaling_cur_freq;
+ user_para->scaling_max.max_freq =
sys_para->scaling_max.max_freq;
+ user_para->scaling_min.min_freq =
sys_para->scaling_min.min_freq;
+ user_para->scaling_max.max_perf_pct =
sys_para->scaling_max.max_perf_pct;
+ user_para->scaling_min.min_perf_pct =
sys_para->scaling_min.min_perf_pct;
+ user_para->num.pstates_num = sys_para->num.pstates_num;
+ user_para->scaling_turbo_pct = sys_para->scaling_turbo_pct;
+ user_para->turbo_enabled = sys_para->turbo_enabled;
memcpy(user_para->scaling_driver,
sys_para->scaling_driver, CPUFREQ_NAME_LEN);
diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c
index a5d07de..58c1b16 100644
--- a/tools/misc/xenpm.c
+++ b/tools/misc/xenpm.c
@@ -47,6 +47,8 @@ void show_help(void)
" get-cpuidle-states [cpuid] list cpu idle info of CPU
<cpuid> or all\n"
" get-cpufreq-states [cpuid] list cpu freq info of CPU
<cpuid> or all\n"
" get-cpufreq-para [cpuid] list cpu freq parameter of
CPU <cpuid> or all\n"
+ " set-scaling-max-pct [cpuid] <num> set max performance limit in
percentage\n"
+ " set-scaling-min-pct [cpuid] <num> set min performance limit in
percentage\n"
" set-scaling-maxfreq [cpuid] <HZ> set max cpu frequency <HZ>
on CPU <cpuid>\n"
" or all CPUs\n"
" set-scaling-minfreq [cpuid] <HZ> set min cpu frequency <HZ>
on CPU <cpuid>\n"
@@ -60,10 +62,10 @@ void show_help(void)
" set-up-threshold [cpuid] <num> set up threshold on CPU
<cpuid> or all\n"
" it is used in ondemand
governor.\n"
" get-cpu-topology get thread/core/socket
topology info\n"
- " set-sched-smt enable|disable enable/disable scheduler
smt power saving\n"
+ " set-sched-smt enable|disable
enable/disable scheduler smt power saving\n"
" set-vcpu-migration-delay <num> set scheduler vcpu migration
delay in us\n"
" get-vcpu-migration-delay get scheduler vcpu migration
delay\n"
- " set-max-cstate <num> set the C-State limitation
(<num> >= 0)\n"
+ " set-max-cstate <num> set the C-State limitation
(<num> >= 0)\n"
" start [seconds] start collect Cx/Px
statistics,\n"
" output after CTRL-C or
SIGINT or several seconds.\n"
" enable-turbo-mode [cpuid] enable Turbo Mode for
processors that support it.\n"
@@ -685,36 +687,42 @@ static void print_cpufreq_para(int cpuid, struct
xc_get_cpufreq_para *p_cpufreq)
if ( !strncmp(p_cpufreq->scaling_governor,
"userspace", CPUFREQ_NAME_LEN) )
{
- printf(" userspace specific :\n");
- printf(" scaling_setspeed : %u\n",
+ printf("userspace specific :\n");
+ printf("scaling_setspeed : %u\n",
p_cpufreq->u.userspace.scaling_setspeed);
}
else if ( !strncmp(p_cpufreq->scaling_governor,
"ondemand", CPUFREQ_NAME_LEN) )
{
- printf(" ondemand specific :\n");
- printf(" sampling_rate : max [%u] min [%u] cur [%u]\n",
+ printf("ondemand specific :\n");
+ printf("sampling_rate : max [%u] min [%u] cur [%u]\n",
p_cpufreq->u.ondemand.sampling_rate_max,
p_cpufreq->u.ondemand.sampling_rate_min,
p_cpufreq->u.ondemand.sampling_rate);
- printf(" up_threshold : %u\n",
+ printf("up_threshold : %u\n",
p_cpufreq->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->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->scaling_max_freq,
- p_cpufreq->scaling_min_freq,
- p_cpufreq->scaling_cur_freq);
-
+ if (!strncmp(p_cpufreq->scaling_driver,
+ "intel_pstate", CPUFREQ_NAME_LEN) ) {
+ printf("num_pstates : %d\n", p_cpufreq->num.pstates_num);
+ printf("max_perf_pct : %d\n",
p_cpufreq->scaling_max.max_perf_pct);
+ printf("min_perf_pct : %d\n",
p_cpufreq->scaling_min.min_perf_pct);
+ printf("turbo_pct : %d\n", p_cpufreq->scaling_turbo_pct);
+ } else {
+ printf("scaling_avail_freq :");
+ for ( i = 0; i < p_cpufreq->num.freq_num; i++ )
+ if ( p_cpufreq->scaling_available_frequencies[i] ==
+ p_cpufreq->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->scaling_max.max_freq,
+ p_cpufreq->scaling_min.min_freq,
+ p_cpufreq->scaling_cur_freq);
+ }
printf("turbo mode : %s\n",
p_cpufreq->turbo_enabled ? "enabled" : "disabled or n/a");
printf("\n");
@@ -727,7 +735,8 @@ static int show_cpufreq_para_by_cpuid(xc_interface
*xc_handle, int cpuid)
struct xc_get_cpufreq_para cpufreq_para, *p_cpufreq = &cpufreq_para;
p_cpufreq->cpu_num = 0;
- p_cpufreq->freq_num = 0;
+ p_cpufreq->num.freq_num = 0;
+ p_cpufreq->num.pstates_num = 0;
p_cpufreq->gov_num = 0;
p_cpufreq->affected_cpus = NULL;
p_cpufreq->scaling_available_frequencies = NULL;
@@ -754,7 +763,7 @@ static int show_cpufreq_para_by_cpuid(xc_interface
*xc_handle, int cpuid)
goto out;
}
if (!(p_cpufreq->scaling_available_frequencies =
- malloc(p_cpufreq->freq_num * sizeof(uint32_t))))
+ malloc(p_cpufreq->num.freq_num * sizeof(uint32_t))))
{
fprintf(stderr,
"[CPU%d] failed to malloc for
scaling_available_frequencies\n",
@@ -860,6 +869,50 @@ void scaling_min_freq_func(int argc, char *argv[])
}
}
+void scaling_max_pct_func(int argc, char *argv[]) {
+ int cpuid = -1, pct = -1;
+
+ parse_cpuid_and_int(argc, argv, &cpuid, &pct, "percentage");
+
+ if ( cpuid < 0 )
+ {
+ int i;
+ for ( i = 0; i < max_cpu_nr; i++ )
+ if ( xc_set_cpufreq_para(xc_handle, i, SCALING_MAX_PCT, pct) )
+ fprintf(stderr,
+ "[CPU%d] failed to set scaling max freq (%d - %s)\n",
+ i, errno, strerror(errno));
+ }
+ else
+ {
+ if ( xc_set_cpufreq_para(xc_handle, cpuid, SCALING_MAX_PCT, pct) )
+ fprintf(stderr, "failed to set scaling max freq (%d - %s)\n",
+ errno, strerror(errno));
+ }
+}
+
+void scaling_min_pct_func(int argc, char *argv[]) {
+ int cpuid = -1, pct = -1;
+
+ parse_cpuid_and_int(argc, argv, &cpuid, &pct, "percentage");
+
+ if ( cpuid < 0 )
+ {
+ int i;
+ for ( i = 0; i < max_cpu_nr; i++ )
+ if ( xc_set_cpufreq_para(xc_handle, i, SCALING_MIN_PCT, pct) )
+ fprintf(stderr,
+ "[CPU%d] failed to set scaling max pct (%d - %s)\n",
+ i, errno, strerror(errno));
+ }
+ else
+ {
+ if ( xc_set_cpufreq_para(xc_handle, cpuid, SCALING_MIN_PCT, pct) )
+ fprintf(stderr, "failed to set scaling min pct (%d - %s)\n",
+ errno, strerror(errno));
+ }
+}
+
void scaling_speed_func(int argc, char *argv[])
{
int cpuid = -1, speed = -1;
@@ -1141,6 +1194,8 @@ struct {
{ "get-cpufreq-para", cpufreq_para_func },
{ "set-scaling-maxfreq", scaling_max_freq_func },
{ "set-scaling-minfreq", scaling_min_freq_func },
+ { "set-scaling-max-pct", scaling_max_pct_func},
+ { "set-scaling-min-pct", scaling_min_pct_func},
{ "set-scaling-governor", scaling_governor_func },
{ "set-scaling-speed", scaling_speed_func },
{ "set-sampling-rate", scaling_sampling_rate_func },
--
1.9.1
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