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author | Keir Fraser <keir.fraser@citrix.com> | 2009-03-31 11:19:56 +0100 |
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committer | Keir Fraser <keir.fraser@citrix.com> | 2009-03-31 11:19:56 +0100 |
commit | c8432f0b5929a6d77cc17cfbc754035c3d86ea1a (patch) | |
tree | 8d6a56fecbf3113f30fd3e9d4e5694431a0672e6 /tools/misc | |
parent | fd598342a0befbbe36a446934e8d291b751b1175 (diff) | |
download | xen-c8432f0b5929a6d77cc17cfbc754035c3d86ea1a.tar.gz xen-c8432f0b5929a6d77cc17cfbc754035c3d86ea1a.tar.bz2 xen-c8432f0b5929a6d77cc17cfbc754035c3d86ea1a.zip |
xenpm: add cmd set-max-cstate
Signed-off-by: Wei Gang <gang.wei@intel.com>
Diffstat (limited to 'tools/misc')
-rw-r--r-- | tools/misc/xenpm.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c index 39eef6517f..1d65393706 100644 --- a/tools/misc/xenpm.c +++ b/tools/misc/xenpm.c @@ -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, int cpuid, struct xc_cx_stat *cxstat) 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; @@ -148,6 +161,8 @@ void cxstat_func(int argc, char *argv[]) if ( cpuid >= max_cpu_nr ) cpuid = -1; + show_max_cstate(xc_fd); + if ( cpuid < 0 ) { /* show cxstates on all cpus */ @@ -864,7 +879,24 @@ void set_sched_smt_func(int argc, char *argv[]) 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[]) |