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Message-ID: <08bf6e5979467a392395b2cae65b4b7b5aca039b.camel@intel.com>
Date: Fri, 12 Jul 2024 03:28:37 +0000
From: "Zhang, Rui" <rui.zhang@...el.com>
To: "alexander.shishkin@...ux.intel.com" <alexander.shishkin@...ux.intel.com>,
"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>, "Hunter, Adrian"
<adrian.hunter@...el.com>, "mingo@...hat.com" <mingo@...hat.com>,
"irogers@...gle.com" <irogers@...gle.com>, "tglx@...utronix.de"
<tglx@...utronix.de>, "gustavoars@...nel.org" <gustavoars@...nel.org>,
"kan.liang@...ux.intel.com" <kan.liang@...ux.intel.com>, "kees@...nel.org"
<kees@...nel.org>, "mark.rutland@....com" <mark.rutland@....com>,
"peterz@...radead.org" <peterz@...radead.org>, "Dhananjay.Ugwekar@....com"
<Dhananjay.Ugwekar@....com>, "bp@...en8.de" <bp@...en8.de>, "acme@...nel.org"
<acme@...nel.org>, "oleksandr@...alenko.name" <oleksandr@...alenko.name>,
"jolsa@...nel.org" <jolsa@...nel.org>, "x86@...nel.org" <x86@...nel.org>,
"namhyung@...nel.org" <namhyung@...nel.org>
CC: "ravi.bangoria@....com" <ravi.bangoria@....com>, "kprateek.nayak@....com"
<kprateek.nayak@....com>, "gautham.shenoy@....com" <gautham.shenoy@....com>,
"linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>,
"sandipan.das@....com" <sandipan.das@....com>, "ananth.narayan@....com"
<ananth.narayan@....com>, "linux-pm@...r.kernel.org"
<linux-pm@...r.kernel.org>
Subject: Re: [PATCH v4 08/11] perf/x86/rapl: Modify the generic variable names
to *_pkg*
On Thu, 2024-07-11 at 10:24 +0000, Dhananjay Ugwekar wrote:
> Prep for addition of power_per_core PMU to handle core scope energy
> consumption for AMD CPUs.
>
> Replace the generic names with *_pkg*, to differentiate between the
> scopes of the two different PMUs and their variables.
>
> No functional change.
>
> Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
Reviewed-by: Zhang Rui <rui.zhang@...el.com>
-rui
> ---
> Changes in v4:
> * Move some renaming code from patch 10 to here (Rui)
> ---
> arch/x86/events/rapl.c | 113 +++++++++++++++++++++------------------
> --
> 1 file changed, 57 insertions(+), 56 deletions(-)
>
> diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
> index 362e82284ccb..9beded3d4a14 100644
> --- a/arch/x86/events/rapl.c
> +++ b/arch/x86/events/rapl.c
> @@ -70,18 +70,18 @@ MODULE_LICENSE("GPL");
> /*
> * RAPL energy status counters
> */
> -enum perf_rapl_events {
> +enum perf_rapl_pkg_events {
> PERF_RAPL_PP0 = 0, /* all cores */
> PERF_RAPL_PKG, /* entire package */
> PERF_RAPL_RAM, /* DRAM */
> PERF_RAPL_PP1, /* gpu */
> PERF_RAPL_PSYS, /* psys */
>
> - PERF_RAPL_MAX,
> - NR_RAPL_DOMAINS = PERF_RAPL_MAX,
> + PERF_RAPL_PKG_EVENTS_MAX,
> + NR_RAPL_PKG_DOMAINS = PERF_RAPL_PKG_EVENTS_MAX,
> };
>
> -static const char *const rapl_domain_names[NR_RAPL_DOMAINS]
> __initconst = {
> +static const char *const rapl_pkg_domain_names[NR_RAPL_PKG_DOMAINS]
> __initconst = {
> "pp0-core",
> "package",
> "dram",
> @@ -134,16 +134,16 @@ enum rapl_unit_quirk {
> };
>
> struct rapl_model {
> - struct perf_msr *rapl_msrs;
> - unsigned long events;
> + struct perf_msr *rapl_pkg_msrs;
> + unsigned long pkg_events;
> unsigned int msr_power_unit;
> enum rapl_unit_quirk unit_quirk;
> };
>
> /* 1/2^hw_unit Joule */
> -static int rapl_hw_unit[NR_RAPL_DOMAINS] __read_mostly;
> -static struct rapl_pmus *rapl_pmus;
> -static unsigned int rapl_cntr_mask;
> +static int rapl_pkg_hw_unit[NR_RAPL_PKG_DOMAINS] __read_mostly;
> +static struct rapl_pmus *rapl_pmus_pkg;
> +static unsigned int rapl_pkg_cntr_mask;
> static u64 rapl_timer_ms;
> static struct perf_msr *rapl_msrs;
> static struct rapl_model *rapl_model;
> @@ -172,7 +172,8 @@ static inline struct rapl_pmu
> *cpu_to_rapl_pmu(unsigned int cpu)
> * The unsigned check also catches the '-1' return value for
> non
> * existent mappings in the topology map.
> */
> - return rapl_pmu_idx < rapl_pmus->nr_rapl_pmu ? rapl_pmus-
> >rapl_pmu[rapl_pmu_idx] : NULL;
> + return rapl_pmu_idx < rapl_pmus_pkg->nr_rapl_pmu ?
> + rapl_pmus_pkg->rapl_pmu[rapl_pmu_idx] : NULL;
> }
>
> static inline u64 rapl_read_counter(struct perf_event *event)
> @@ -184,7 +185,7 @@ static inline u64 rapl_read_counter(struct
> perf_event *event)
>
> static inline u64 rapl_scale(u64 v, int cfg)
> {
> - if (cfg > NR_RAPL_DOMAINS) {
> + if (cfg > NR_RAPL_PKG_DOMAINS) {
> pr_warn("Invalid domain %d, failed to scale data\n",
> cfg);
> return v;
> }
> @@ -194,7 +195,7 @@ static inline u64 rapl_scale(u64 v, int cfg)
> * or use ldexp(count, -32).
> * Watts = Joules/Time delta
> */
> - return v << (32 - rapl_hw_unit[cfg - 1]);
> + return v << (32 - rapl_pkg_hw_unit[cfg - 1]);
> }
>
> static u64 rapl_event_update(struct perf_event *event)
> @@ -354,7 +355,7 @@ static int rapl_pmu_event_init(struct perf_event
> *event)
> struct rapl_pmu *rapl_pmu;
>
> /* only look at RAPL events */
> - if (event->attr.type != rapl_pmus->pmu.type)
> + if (event->attr.type != rapl_pmus_pkg->pmu.type)
> return -ENOENT;
>
> /* check only supported bits are set */
> @@ -366,14 +367,14 @@ static int rapl_pmu_event_init(struct
> perf_event *event)
>
> event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG;
>
> - if (!cfg || cfg >= NR_RAPL_DOMAINS + 1)
> + if (!cfg || cfg >= NR_RAPL_PKG_DOMAINS + 1)
> return -EINVAL;
>
> - cfg = array_index_nospec((long)cfg, NR_RAPL_DOMAINS + 1);
> + cfg = array_index_nospec((long)cfg, NR_RAPL_PKG_DOMAINS + 1);
> bit = cfg - 1;
>
> /* check event supported */
> - if (!(rapl_cntr_mask & (1 << bit)))
> + if (!(rapl_pkg_cntr_mask & (1 << bit)))
> return -EINVAL;
>
> /* unsupported modes and filters */
> @@ -401,7 +402,7 @@ static void rapl_pmu_event_read(struct perf_event
> *event)
> static ssize_t rapl_get_attr_cpumask(struct device *dev,
> struct device_attribute *attr, char
> *buf)
> {
> - return cpumap_print_to_pagebuf(true, buf, rapl_pmus-
> >cpumask);
> + return cpumap_print_to_pagebuf(true, buf, rapl_pmus_pkg-
> >cpumask);
> }
>
> static DEVICE_ATTR(cpumask, S_IRUGO, rapl_get_attr_cpumask, NULL);
> @@ -553,11 +554,11 @@ static struct perf_msr intel_rapl_spr_msrs[] =
> {
> };
>
> /*
> - * Force to PERF_RAPL_MAX size due to:
> - * - perf_msr_probe(PERF_RAPL_MAX)
> + * Force to PERF_RAPL_PKG_EVENTS_MAX size due to:
> + * - perf_msr_probe(PERF_RAPL_PKG_EVENTS_MAX)
> * - want to use same event codes across both architectures
> */
> -static struct perf_msr amd_rapl_msrs[] = {
> +static struct perf_msr amd_rapl_pkg_msrs[] = {
> [PERF_RAPL_PP0] = { 0, &rapl_events_cores_group, NULL,
> false, 0 },
> [PERF_RAPL_PKG] = { MSR_AMD_PKG_ENERGY_STATUS,
> &rapl_events_pkg_group, test_msr, false, RAPL_MSR_MASK },
> [PERF_RAPL_RAM] = { 0, &rapl_events_ram_group, NULL,
> false, 0 },
> @@ -590,7 +591,7 @@ static int __rapl_cpu_offline(struct rapl_pmus
> *rapl_pmus, unsigned int rapl_pmu
>
> static int rapl_cpu_offline(unsigned int cpu)
> {
> - return __rapl_cpu_offline(rapl_pmus, get_rapl_pmu_idx(cpu),
> + return __rapl_cpu_offline(rapl_pmus_pkg,
> get_rapl_pmu_idx(cpu),
> get_rapl_pmu_cpumask(cpu), cpu);
> }
>
> @@ -629,7 +630,7 @@ static int __rapl_cpu_online(struct rapl_pmus
> *rapl_pmus, unsigned int rapl_pmu_
>
> static int rapl_cpu_online(unsigned int cpu)
> {
> - return __rapl_cpu_online(rapl_pmus, get_rapl_pmu_idx(cpu),
> + return __rapl_cpu_online(rapl_pmus_pkg,
> get_rapl_pmu_idx(cpu),
> get_rapl_pmu_cpumask(cpu), cpu);
> }
>
> @@ -642,8 +643,8 @@ static int rapl_check_hw_unit(void)
> /* protect rdmsrl() to handle virtualization */
> if (rdmsrl_safe(rapl_model->msr_power_unit,
> &msr_rapl_power_unit_bits))
> return -1;
> - for (i = 0; i < NR_RAPL_DOMAINS; i++)
> - rapl_hw_unit[i] = (msr_rapl_power_unit_bits >> 8) &
> 0x1FULL;
> + for (i = 0; i < NR_RAPL_PKG_DOMAINS; i++)
> + rapl_pkg_hw_unit[i] = (msr_rapl_power_unit_bits >> 8)
> & 0x1FULL;
>
> switch (rapl_model->unit_quirk) {
> /*
> @@ -653,11 +654,11 @@ static int rapl_check_hw_unit(void)
> * of 2. Datasheet, September 2014, Reference Number: 330784-
> 001 "
> */
> case RAPL_UNIT_QUIRK_INTEL_HSW:
> - rapl_hw_unit[PERF_RAPL_RAM] = 16;
> + rapl_pkg_hw_unit[PERF_RAPL_RAM] = 16;
> break;
> /* SPR uses a fixed energy unit for Psys domain. */
> case RAPL_UNIT_QUIRK_INTEL_SPR:
> - rapl_hw_unit[PERF_RAPL_PSYS] = 0;
> + rapl_pkg_hw_unit[PERF_RAPL_PSYS] = 0;
> break;
> default:
> break;
> @@ -672,9 +673,9 @@ static int rapl_check_hw_unit(void)
> * if hw unit is 32, then we use 2 ms 1/200/2
> */
> rapl_timer_ms = 2;
> - if (rapl_hw_unit[0] < 32) {
> + if (rapl_pkg_hw_unit[0] < 32) {
> rapl_timer_ms = (1000 / (2 * 100));
> - rapl_timer_ms *= (1ULL << (32 - rapl_hw_unit[0] -
> 1));
> + rapl_timer_ms *= (1ULL << (32 - rapl_pkg_hw_unit[0] -
> 1));
> }
> return 0;
> }
> @@ -684,12 +685,12 @@ static void __init rapl_advertise(void)
> int i;
>
> pr_info("API unit is 2^-32 Joules, %d fixed counters, %llu ms
> ovfl timer\n",
> - hweight32(rapl_cntr_mask), rapl_timer_ms);
> + hweight32(rapl_pkg_cntr_mask), rapl_timer_ms);
>
> - for (i = 0; i < NR_RAPL_DOMAINS; i++) {
> - if (rapl_cntr_mask & (1 << i)) {
> + for (i = 0; i < NR_RAPL_PKG_DOMAINS; i++) {
> + if (rapl_pkg_cntr_mask & (1 << i)) {
> pr_info("hw unit of domain %s 2^-%d
> Joules\n",
> - rapl_domain_names[i],
> rapl_hw_unit[i]);
> + rapl_pkg_domain_names[i],
> rapl_pkg_hw_unit[i]);
> }
> }
> }
> @@ -746,71 +747,71 @@ static int __init init_rapl_pmus(struct
> rapl_pmus **rapl_pmus_ptr)
> }
>
> static struct rapl_model model_snb = {
> - .events = BIT(PERF_RAPL_PP0) |
> + .pkg_events = BIT(PERF_RAPL_PP0) |
> BIT(PERF_RAPL_PKG) |
> BIT(PERF_RAPL_PP1),
> .msr_power_unit = MSR_RAPL_POWER_UNIT,
> - .rapl_msrs = intel_rapl_msrs,
> + .rapl_pkg_msrs = intel_rapl_msrs,
> };
>
> static struct rapl_model model_snbep = {
> - .events = BIT(PERF_RAPL_PP0) |
> + .pkg_events = BIT(PERF_RAPL_PP0) |
> BIT(PERF_RAPL_PKG) |
> BIT(PERF_RAPL_RAM),
> .msr_power_unit = MSR_RAPL_POWER_UNIT,
> - .rapl_msrs = intel_rapl_msrs,
> + .rapl_pkg_msrs = intel_rapl_msrs,
> };
>
> static struct rapl_model model_hsw = {
> - .events = BIT(PERF_RAPL_PP0) |
> + .pkg_events = BIT(PERF_RAPL_PP0) |
> BIT(PERF_RAPL_PKG) |
> BIT(PERF_RAPL_RAM) |
> BIT(PERF_RAPL_PP1),
> .msr_power_unit = MSR_RAPL_POWER_UNIT,
> - .rapl_msrs = intel_rapl_msrs,
> + .rapl_pkg_msrs = intel_rapl_msrs,
> };
>
> static struct rapl_model model_hsx = {
> - .events = BIT(PERF_RAPL_PP0) |
> + .pkg_events = BIT(PERF_RAPL_PP0) |
> BIT(PERF_RAPL_PKG) |
> BIT(PERF_RAPL_RAM),
> .unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW,
> .msr_power_unit = MSR_RAPL_POWER_UNIT,
> - .rapl_msrs = intel_rapl_msrs,
> + .rapl_pkg_msrs = intel_rapl_msrs,
> };
>
> static struct rapl_model model_knl = {
> - .events = BIT(PERF_RAPL_PKG) |
> + .pkg_events = BIT(PERF_RAPL_PKG) |
> BIT(PERF_RAPL_RAM),
> .unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW,
> .msr_power_unit = MSR_RAPL_POWER_UNIT,
> - .rapl_msrs = intel_rapl_msrs,
> + .rapl_pkg_msrs = intel_rapl_msrs,
> };
>
> static struct rapl_model model_skl = {
> - .events = BIT(PERF_RAPL_PP0) |
> + .pkg_events = BIT(PERF_RAPL_PP0) |
> BIT(PERF_RAPL_PKG) |
> BIT(PERF_RAPL_RAM) |
> BIT(PERF_RAPL_PP1) |
> BIT(PERF_RAPL_PSYS),
> .msr_power_unit = MSR_RAPL_POWER_UNIT,
> - .rapl_msrs = intel_rapl_msrs,
> + .rapl_pkg_msrs = intel_rapl_msrs,
> };
>
> static struct rapl_model model_spr = {
> - .events = BIT(PERF_RAPL_PP0) |
> + .pkg_events = BIT(PERF_RAPL_PP0) |
> BIT(PERF_RAPL_PKG) |
> BIT(PERF_RAPL_RAM) |
> BIT(PERF_RAPL_PSYS),
> .unit_quirk = RAPL_UNIT_QUIRK_INTEL_SPR,
> .msr_power_unit = MSR_RAPL_POWER_UNIT,
> - .rapl_msrs = intel_rapl_spr_msrs,
> + .rapl_pkg_msrs = intel_rapl_spr_msrs,
> };
>
> static struct rapl_model model_amd_hygon = {
> - .events = BIT(PERF_RAPL_PKG),
> + .pkg_events = BIT(PERF_RAPL_PKG),
> .msr_power_unit = MSR_AMD_RAPL_POWER_UNIT,
> - .rapl_msrs = amd_rapl_msrs,
> + .rapl_pkg_msrs = amd_rapl_pkg_msrs,
> };
>
> static const struct x86_cpu_id rapl_model_match[] __initconst = {
> @@ -874,16 +875,16 @@ static int __init rapl_pmu_init(void)
>
> rapl_model = (struct rapl_model *) id->driver_data;
>
> - rapl_msrs = rapl_model->rapl_msrs;
> + rapl_msrs = rapl_model->rapl_pkg_msrs;
>
> - rapl_cntr_mask = perf_msr_probe(rapl_msrs, PERF_RAPL_MAX,
> - false, (void *) &rapl_model-
> >events);
> + rapl_pkg_cntr_mask = perf_msr_probe(rapl_msrs,
> PERF_RAPL_PKG_EVENTS_MAX,
> + false, (void *) &rapl_model-
> >pkg_events);
>
> ret = rapl_check_hw_unit();
> if (ret)
> return ret;
>
> - ret = init_rapl_pmus(&rapl_pmus);
> + ret = init_rapl_pmus(&rapl_pmus_pkg);
> if (ret)
> return ret;
>
> @@ -896,7 +897,7 @@ static int __init rapl_pmu_init(void)
> if (ret)
> goto out;
>
> - ret = perf_pmu_register(&rapl_pmus->pmu, "power", -1);
> + ret = perf_pmu_register(&rapl_pmus_pkg->pmu, "power", -1);
> if (ret)
> goto out1;
>
> @@ -907,7 +908,7 @@ static int __init rapl_pmu_init(void)
> cpuhp_remove_state(CPUHP_AP_PERF_X86_RAPL_ONLINE);
> out:
> pr_warn("Initialization failed (%d), disabled\n", ret);
> - cleanup_rapl_pmus(rapl_pmus);
> + cleanup_rapl_pmus(rapl_pmus_pkg);
> return ret;
> }
> module_init(rapl_pmu_init);
> @@ -915,7 +916,7 @@ module_init(rapl_pmu_init);
> static void __exit intel_rapl_exit(void)
> {
> cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_RAPL_ONLINE);
> - perf_pmu_unregister(&rapl_pmus->pmu);
> - cleanup_rapl_pmus(rapl_pmus);
> + perf_pmu_unregister(&rapl_pmus_pkg->pmu);
> + cleanup_rapl_pmus(rapl_pmus_pkg);
> }
> module_exit(intel_rapl_exit);
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