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authorPatryk Wlazlyn <patryk.wlazlyn@linux.intel.com>2024-01-30 23:57:07 +0100
committerLen Brown <len.brown@intel.com>2024-04-02 18:50:14 +0200
commitaed48c48fa65abdd584e14f7d0273711bc10d223 (patch)
tree900adbda3504da7614cf00a96bc8272b765772ac /tools
parenttools/power turbostat: detect and disable unavailable BICs at runtime (diff)
downloadlinux-aed48c48fa65abdd584e14f7d0273711bc10d223.tar.xz
linux-aed48c48fa65abdd584e14f7d0273711bc10d223.zip
tools/power turbostat: add early exits for permission checks
Checking early if the permissions are even needed gets rid of the warnings about some of them missing. Earlier we issued a warning in case of missing MSR and/or perf permissions, even when user never asked for counters that require those. Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/power/x86/turbostat/turbostat.c66
1 files changed, 61 insertions, 5 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 30db6e92193a..e5e01b58992e 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -5818,6 +5818,14 @@ static int has_instr_count_access(void)
return has_access;
}
+bool is_aperf_access_required(void)
+{
+ return BIC_IS_ENABLED(BIC_Avg_MHz)
+ || BIC_IS_ENABLED(BIC_Busy)
+ || BIC_IS_ENABLED(BIC_Bzy_MHz)
+ || BIC_IS_ENABLED(BIC_IPC);
+}
+
/*
* Linux-perf manages the HW instructions-retired counter
* by enabling when requested, and hiding rollover
@@ -5833,8 +5841,7 @@ void linux_perf_init(void)
err(-1, "calloc fd_instr_count_percpu");
}
- const bool aperf_required = BIC_IS_ENABLED(BIC_Avg_MHz) || BIC_IS_ENABLED(BIC_Busy) ||
- BIC_IS_ENABLED(BIC_Bzy_MHz) || BIC_IS_ENABLED(BIC_IPC);
+ const bool aperf_required = is_aperf_access_required();
if (aperf_required && has_aperf && amperf_source == AMPERF_SOURCE_PERF) {
fd_amperf_percpu = calloc(topo.max_cpu_num + 1, sizeof(*fd_amperf_percpu));
if (fd_amperf_percpu == NULL)
@@ -5903,6 +5910,9 @@ static int has_amperf_access_via_perf(void)
/* Check if we can access APERF and MPERF */
static int has_amperf_access(void)
{
+ if (!is_aperf_access_required())
+ return 0;
+
if (!no_msr && has_amperf_access_via_msr())
return 1;
@@ -6581,7 +6591,8 @@ static void set_amperf_source(void)
{
amperf_source = AMPERF_SOURCE_PERF;
- if (no_perf || !has_amperf_access_via_perf())
+ const bool aperf_required = is_aperf_access_required();
+ if (no_perf || !aperf_required || !has_amperf_access_via_perf())
amperf_source = AMPERF_SOURCE_MSR;
if (quiet || !debug)
@@ -6590,8 +6601,51 @@ static void set_amperf_source(void)
fprintf(outf, "aperf/mperf source preference: %s\n", amperf_source == AMPERF_SOURCE_MSR ? "msr" : "perf");
}
+bool is_msr_access_required(void)
+{
+ /* TODO: add detection for dynamic counters from add_counter() */
+ if (no_msr)
+ return false;
+
+ return BIC_IS_ENABLED(BIC_SMI)
+ || BIC_IS_ENABLED(BIC_CPU_c1)
+ || BIC_IS_ENABLED(BIC_CPU_c3)
+ || BIC_IS_ENABLED(BIC_CPU_c6)
+ || BIC_IS_ENABLED(BIC_CPU_c7)
+ || BIC_IS_ENABLED(BIC_Mod_c6)
+ || BIC_IS_ENABLED(BIC_CoreTmp)
+ || BIC_IS_ENABLED(BIC_Totl_c0)
+ || BIC_IS_ENABLED(BIC_Any_c0)
+ || BIC_IS_ENABLED(BIC_GFX_c0)
+ || BIC_IS_ENABLED(BIC_CPUGFX)
+ || BIC_IS_ENABLED(BIC_Pkgpc3)
+ || BIC_IS_ENABLED(BIC_Pkgpc6)
+ || BIC_IS_ENABLED(BIC_Pkgpc2)
+ || BIC_IS_ENABLED(BIC_Pkgpc7)
+ || BIC_IS_ENABLED(BIC_Pkgpc8)
+ || BIC_IS_ENABLED(BIC_Pkgpc9)
+ || BIC_IS_ENABLED(BIC_Pkgpc10)
+ || BIC_IS_ENABLED(BIC_CorWatt)
+ || BIC_IS_ENABLED(BIC_Cor_J)
+ || BIC_IS_ENABLED(BIC_PkgWatt)
+ || BIC_IS_ENABLED(BIC_CorWatt)
+ || BIC_IS_ENABLED(BIC_GFXWatt)
+ || BIC_IS_ENABLED(BIC_RAMWatt)
+ || BIC_IS_ENABLED(BIC_Pkg_J)
+ || BIC_IS_ENABLED(BIC_Cor_J)
+ || BIC_IS_ENABLED(BIC_GFX_J)
+ || BIC_IS_ENABLED(BIC_RAM_J)
+ || BIC_IS_ENABLED(BIC_PKG__)
+ || BIC_IS_ENABLED(BIC_RAM__)
+ || BIC_IS_ENABLED(BIC_PkgTmp)
+ || (is_aperf_access_required() && !has_amperf_access_via_perf());
+}
+
void check_msr_access(void)
{
+ if (!is_msr_access_required())
+ no_msr = 1;
+
check_dev_msr();
check_msr_permission();
@@ -6601,10 +6655,12 @@ void check_msr_access(void)
void check_perf_access(void)
{
- if (no_perf || !has_instr_count_access())
+ const bool intrcount_required = BIC_IS_ENABLED(BIC_IPC);
+ if (no_perf || !intrcount_required || !has_instr_count_access())
bic_enabled &= ~BIC_IPC;
- if (!has_amperf_access()) {
+ const bool aperf_required = is_aperf_access_required();
+ if (!aperf_required || !has_amperf_access()) {
bic_enabled &= ~BIC_Avg_MHz;
bic_enabled &= ~BIC_Busy;
bic_enabled &= ~BIC_Bzy_MHz;