# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1238494796 -3600
# Node ID 687376c92188bfd2de64bd182fc1be55d14ccbfe
# Parent fa8dc6e43ec8d2870ce12d627c22359e7e47e04e
xenpm: add cmd set-max-cstate
Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>
---
tools/misc/xenpm.c | 35 ++++++++++++++++++++++++++++++++++-
1 files changed, 34 insertions(+), 1 deletion(-)
diff -r fa8dc6e43ec8 -r 687376c92188 tools/misc/xenpm.c
--- a/tools/misc/xenpm.c Tue Mar 31 11:19:26 2009 +0100
+++ b/tools/misc/xenpm.c Tue Mar 31 11:19:56 2009 +0100
@@ -57,6 +57,7 @@ void show_help(void)
" 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-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"
);
@@ -122,6 +123,18 @@ static int get_cxstat_by_cpuid(int xc_fd
return 0;
}
+static int show_max_cstate(int xc_fd)
+{
+ int ret = 0;
+ uint32_t value;
+
+ if ( (ret = xc_get_cpuidle_max_cstate(xc_fd, &value)) )
+ return ret;
+
+ printf("Max C-state: C%d\n\n", value);
+ return 0;
+}
+
static int show_cxstat_by_cpuid(int xc_fd, int cpuid)
{
int ret = 0;
@@ -147,6 +160,8 @@ void cxstat_func(int argc, char *argv[])
if ( cpuid >= max_cpu_nr )
cpuid = -1;
+
+ show_max_cstate(xc_fd);
if ( cpuid < 0 )
{
@@ -864,7 +879,24 @@ void set_sched_smt_func(int argc, char *
rc = xc_set_sched_opt_smt(xc_fd, value);
printf("%s sched_smt_power_savings %s\n", argv[0],
- rc? "failed":"successeed" );
+ rc? "failed":"succeeded" );
+
+ return;
+}
+
+void set_max_cstate_func(int argc, char *argv[])
+{
+ int value, rc;
+
+ if ( argc != 1 || sscanf(argv[0], "%d", &value) != 1 || value < 0 )
+ {
+ show_help();
+ exit(-1);
+ }
+
+ rc = xc_set_cpuidle_max_cstate(xc_fd, (uint32_t)value);
+ printf("set max_cstate to C%d %s\n", value,
+ rc? "failed":"succeeded" );
return;
}
@@ -886,6 +918,7 @@ struct {
{ "set-up-threshold", scaling_up_threshold_func },
{ "get-cpu-topology", cpu_topology_func},
{ "set-sched-smt", set_sched_smt_func},
+ { "set-max-cstate", set_max_cstate_func},
};
int main(int argc, char *argv[])
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