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Message-ID: <Zx+fQOiPc91A4mlq@BLRRASHENOY1.amd.com>
Date: Mon, 28 Oct 2024 19:57:12 +0530
From: "Gautham R. Shenoy" <gautham.shenoy@....com>
To: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
Cc: peterz@...radead.org, mingo@...hat.com, rui.zhang@...el.com,
acme@...nel.org, namhyung@...nel.org, mark.rutland@....com,
alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
irogers@...gle.com, adrian.hunter@...el.com,
kan.liang@...ux.intel.com, tglx@...utronix.de, bp@...en8.de,
dave.hansen@...ux.intel.com, ananth.narayan@....com,
kprateek.nayak@....com, ravi.bangoria@....com, x86@...nel.org,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 07/10] perf/x86/rapl: Modify the generic variable
names to *_pkg*
On Fri, Oct 25, 2024 at 11:13:45AM +0000, Dhananjay Ugwekar wrote:
> Prepare for the addition of RAPL core energy counter support.
>
> Replace the generic names with *_pkg*, to later on differentiate between
> the scopes of the two different PMUs and their variables.
>
> No functional change.
>
> Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
Looks good to me, even though rapl_pkg_pmu_is_pkg_scope() is a bit
mouthful. But I cannot think of an alternative.
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@....com>
--
Thanks and Regards
gautham.
> ---
> arch/x86/events/rapl.c | 118 ++++++++++++++++++++---------------------
> 1 file changed, 59 insertions(+), 59 deletions(-)
>
> diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
> index bf6fee114294..ae8b450caa9b 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",
> @@ -112,7 +112,7 @@ static struct perf_pmu_events_attr event_attr_##v = { \
> * considered as either pkg-scope or die-scope, and we are considering
> * them as die-scope.
> */
> -#define rapl_pmu_is_pkg_scope() \
> +#define rapl_pkg_pmu_is_pkg_scope() \
> (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || \
> boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
>
> @@ -139,16 +139,16 @@ 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;
> @@ -159,7 +159,7 @@ static struct rapl_model *rapl_model;
> */
> static inline unsigned int get_rapl_pmu_idx(int cpu)
> {
> - return rapl_pmu_is_pkg_scope() ? topology_logical_package_id(cpu) :
> + return rapl_pkg_pmu_is_pkg_scope() ? topology_logical_package_id(cpu) :
> topology_logical_die_id(cpu);
> }
>
> @@ -172,7 +172,7 @@ 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;
> }
> @@ -182,7 +182,7 @@ 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)
> @@ -342,7 +342,7 @@ 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 */
> @@ -352,14 +352,14 @@ static int rapl_pmu_event_init(struct perf_event *event)
> if (event->cpu < 0)
> return -EINVAL;
>
> - 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 */
> @@ -367,11 +367,11 @@ static int rapl_pmu_event_init(struct perf_event *event)
> return -EINVAL;
>
> rapl_pmu_idx = get_rapl_pmu_idx(event->cpu);
> - if (rapl_pmu_idx >= rapl_pmus->nr_rapl_pmu)
> + if (rapl_pmu_idx >= rapl_pmus_pkg->nr_rapl_pmu)
> return -EINVAL;
>
> /* must be done before validate_group */
> - rapl_pmu = rapl_pmus->rapl_pmu[rapl_pmu_idx];
> + rapl_pmu = rapl_pmus_pkg->rapl_pmu[rapl_pmu_idx];
> if (!rapl_pmu)
> return -EINVAL;
>
> @@ -525,11 +525,11 @@ 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 },
> @@ -545,8 +545,8 @@ 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) {
> /*
> @@ -556,11 +556,11 @@ 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;
> @@ -575,9 +575,9 @@ 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;
> }
> @@ -587,12 +587,12 @@ 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]);
> }
> }
> }
> @@ -673,71 +673,71 @@ static int __init init_rapl_pmus(struct rapl_pmus **rapl_pmus_ptr, int rapl_pmu_
> }
>
> 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 = {
> @@ -793,11 +793,11 @@ MODULE_DEVICE_TABLE(x86cpu, rapl_model_match);
> static int __init rapl_pmu_init(void)
> {
> const struct x86_cpu_id *id;
> - int rapl_pmu_scope = PERF_PMU_SCOPE_DIE;
> + int rapl_pkg_pmu_scope = PERF_PMU_SCOPE_DIE;
> int ret;
>
> - if (rapl_pmu_is_pkg_scope())
> - rapl_pmu_scope = PERF_PMU_SCOPE_PKG;
> + if (rapl_pkg_pmu_is_pkg_scope())
> + rapl_pkg_pmu_scope = PERF_PMU_SCOPE_PKG;
>
> id = x86_match_cpu(rapl_model_match);
> if (!id)
> @@ -805,20 +805,20 @@ 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, rapl_pmu_scope);
> + ret = init_rapl_pmus(&rapl_pmus_pkg, rapl_pkg_pmu_scope);
> if (ret)
> return ret;
>
> - ret = perf_pmu_register(&rapl_pmus->pmu, "power", -1);
> + ret = perf_pmu_register(&rapl_pmus_pkg->pmu, "power", -1);
> if (ret)
> goto out;
>
> @@ -827,14 +827,14 @@ static int __init rapl_pmu_init(void)
>
> 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);
>
> static void __exit intel_rapl_exit(void)
> {
> - 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);
> --
> 2.34.1
>
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