From patchwork Fri Nov 11 07:26:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Feifei Wang X-Patchwork-Id: 119768 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id E0E87A0542; Fri, 11 Nov 2022 08:27:06 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 92A2141181; Fri, 11 Nov 2022 08:27:02 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id 5E37342D0D for ; Fri, 11 Nov 2022 08:27:01 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0197C23A; Thu, 10 Nov 2022 23:27:07 -0800 (PST) Received: from net-x86-dell-8268.shanghai.arm.com (net-x86-dell-8268.shanghai.arm.com [10.169.210.116]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0DCC43F534; Thu, 10 Nov 2022 23:26:57 -0800 (PST) From: Feifei Wang To: Ruifeng Wang Cc: dev@dpdk.org, david.hunt@intel.com, david.marchand@redhat.com, thomas@monjalon.net, stephen@networkplumber.org, nd@arm.com, Feifei Wang Subject: [PATCH v3 1/3] eal: add 8 bits case for wait scheme Date: Fri, 11 Nov 2022 15:26:47 +0800 Message-Id: <20221111072649.3304429-2-feifei.wang2@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221111072649.3304429-1-feifei.wang2@arm.com> References: <20220825064251.2637274-1-feifei.wang2@arm.com> <20221111072649.3304429-1-feifei.wang2@arm.com> MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org For wait scheme generic helper, add 8 bits case. Signed-off-by: Feifei Wang Reviewed-by: Ruifeng Wang --- lib/eal/arm/include/rte_pause_64.h | 27 ++++++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) diff --git a/lib/eal/arm/include/rte_pause_64.h b/lib/eal/arm/include/rte_pause_64.h index fe4d42b1ea..c21600ca96 100644 --- a/lib/eal/arm/include/rte_pause_64.h +++ b/lib/eal/arm/include/rte_pause_64.h @@ -31,6 +31,25 @@ static inline void rte_pause(void) /* Put processor into low power WFE(Wait For Event) state. */ #define __RTE_ARM_WFE() { asm volatile("wfe" : : : "memory"); } +/* + * Atomic exclusive load from addr, it returns the 8-bit content of + * *addr while making it 'monitored', when it is written by someone + * else, the 'monitored' state is cleared and an event is generated + * implicitly to exit WFE. + */ +#define __RTE_ARM_LOAD_EXC_8(src, dst, memorder) { \ + if (memorder == __ATOMIC_RELAXED) { \ + asm volatile("ldxrb %w[tmp], [%x[addr]]" \ + : [tmp] "=&r" (dst) \ + : [addr] "r" (src) \ + : "memory"); \ + } else { \ + asm volatile("ldaxrb %w[tmp], [%x[addr]]" \ + : [tmp] "=&r" (dst) \ + : [addr] "r" (src) \ + : "memory"); \ + } } + /* * Atomic exclusive load from addr, it returns the 16-bit content of * *addr while making it 'monitored', when it is written by someone @@ -111,9 +130,11 @@ static inline void rte_pause(void) } } \ #define __RTE_ARM_LOAD_EXC(src, dst, memorder, size) { \ - RTE_BUILD_BUG_ON(size != 16 && size != 32 && \ - size != 64 && size != 128); \ - if (size == 16) \ + RTE_BUILD_BUG_ON(size != 8 && size != 16 && \ + size != 32 && size != 64 && size != 128); \ + if (size == 8) \ + __RTE_ARM_LOAD_EXC_8(src, dst, memorder) \ + else if (size == 16) \ __RTE_ARM_LOAD_EXC_16(src, dst, memorder) \ else if (size == 32) \ __RTE_ARM_LOAD_EXC_32(src, dst, memorder) \ From patchwork Fri Nov 11 07:26:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Feifei Wang X-Patchwork-Id: 119769 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 5C976A0542; Fri, 11 Nov 2022 08:27:11 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 5A6FE40F16; Fri, 11 Nov 2022 08:27:06 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id 5140942D14 for ; Fri, 11 Nov 2022 08:27:04 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 068F51FB; Thu, 10 Nov 2022 23:27:10 -0800 (PST) Received: from net-x86-dell-8268.shanghai.arm.com (net-x86-dell-8268.shanghai.arm.com [10.169.210.116]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3A4773F534; Thu, 10 Nov 2022 23:27:00 -0800 (PST) From: Feifei Wang To: Ruifeng Wang Cc: dev@dpdk.org, david.hunt@intel.com, david.marchand@redhat.com, thomas@monjalon.net, stephen@networkplumber.org, nd@arm.com, Feifei Wang Subject: [PATCH v3 2/3] eal: add power mgmt support on Arm Date: Fri, 11 Nov 2022 15:26:48 +0800 Message-Id: <20221111072649.3304429-3-feifei.wang2@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221111072649.3304429-1-feifei.wang2@arm.com> References: <20220825064251.2637274-1-feifei.wang2@arm.com> <20221111072649.3304429-1-feifei.wang2@arm.com> MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org For Arm aarch, use WFE instruction to enable power monitor API, and use SEV instruction to enable wake up API. Signed-off-by: Feifei Wang Reviewed-by: Ruifeng Wang --- lib/eal/arm/include/rte_pause_64.h | 5 ++- lib/eal/arm/rte_cpuflags.c | 5 +++ lib/eal/arm/rte_power_intrinsics.c | 72 ++++++++++++++++++++++++++++-- 3 files changed, 78 insertions(+), 4 deletions(-) diff --git a/lib/eal/arm/include/rte_pause_64.h b/lib/eal/arm/include/rte_pause_64.h index c21600ca96..5f70e97481 100644 --- a/lib/eal/arm/include/rte_pause_64.h +++ b/lib/eal/arm/include/rte_pause_64.h @@ -25,9 +25,12 @@ static inline void rte_pause(void) #ifdef RTE_WAIT_UNTIL_EQUAL_ARCH_DEFINED -/* Send an event to quit WFE. */ +/* Send a local event to quit WFE. */ #define __RTE_ARM_SEVL() { asm volatile("sevl" : : : "memory"); } +/* Send a global event to quit WFE for all cores. */ +#define __RTE_ARM_SEV() { asm volatile("sev" : : : "memory"); } + /* Put processor into low power WFE(Wait For Event) state. */ #define __RTE_ARM_WFE() { asm volatile("wfe" : : : "memory"); } diff --git a/lib/eal/arm/rte_cpuflags.c b/lib/eal/arm/rte_cpuflags.c index 93461191c7..90b80709fd 100644 --- a/lib/eal/arm/rte_cpuflags.c +++ b/lib/eal/arm/rte_cpuflags.c @@ -163,4 +163,9 @@ void rte_cpu_get_intrinsics_support(struct rte_cpu_intrinsics *intrinsics) { memset(intrinsics, 0, sizeof(*intrinsics)); + +#ifdef RTE_ARM_USE_WFE + intrinsics->power_monitor = 1; +#endif + } diff --git a/lib/eal/arm/rte_power_intrinsics.c b/lib/eal/arm/rte_power_intrinsics.c index 13f6a3264d..d7d8d7af2f 100644 --- a/lib/eal/arm/rte_power_intrinsics.c +++ b/lib/eal/arm/rte_power_intrinsics.c @@ -6,17 +6,75 @@ #include "rte_power_intrinsics.h" +#ifdef RTE_ARM_USE_WFE +static inline int +__check_val_size(const uint8_t sz) +{ + switch (sz) { + case sizeof(uint8_t): /* fall-through */ + case sizeof(uint16_t): /* fall-through */ + case sizeof(uint32_t): /* fall-through */ + case sizeof(uint64_t): /* fall-through */ + return 0; + default: + /* unexpected size */ + return -1; + } +} +#endif + /** - * This function is not supported on ARM. + * This function uses WFE instruction to make lcore suspend + * execution on ARM. + * Note that timestamp based timeout is not supported yet. */ int rte_power_monitor(const struct rte_power_monitor_cond *pmc, const uint64_t tsc_timestamp) { - RTE_SET_USED(pmc); RTE_SET_USED(tsc_timestamp); +#ifdef RTE_ARM_USE_WFE + const unsigned int lcore_id = rte_lcore_id(); + uint64_t cur_value; + + /* prevent non-EAL thread from using this API */ + if (lcore_id >= RTE_MAX_LCORE) + return -EINVAL; + + if (pmc == NULL) + return -EINVAL; + + if (__check_val_size(pmc->size) < 0) + return -EINVAL; + + if (pmc->fn == NULL) + return -EINVAL; + + switch (pmc->size) { + case sizeof(uint8_t): + __RTE_ARM_LOAD_EXC_8(pmc->addr, cur_value, __ATOMIC_RELAXED); + __RTE_ARM_WFE() + break; + case sizeof(uint16_t): + __RTE_ARM_LOAD_EXC_16(pmc->addr, cur_value, __ATOMIC_RELAXED); + __RTE_ARM_WFE() + break; + case sizeof(uint32_t): + __RTE_ARM_LOAD_EXC_32(pmc->addr, cur_value, __ATOMIC_RELAXED); + __RTE_ARM_WFE() + break; + case sizeof(uint64_t): + __RTE_ARM_LOAD_EXC_64(pmc->addr, cur_value, __ATOMIC_RELAXED); + __RTE_ARM_WFE() + } + + return 0; +#else + RTE_SET_USED(pmc); + return -ENOTSUP; +#endif } /** @@ -31,14 +89,22 @@ rte_power_pause(const uint64_t tsc_timestamp) } /** - * This function is not supported on ARM. + * This function uses SEV instruction to wake up all cores + * on ARM. + * Note that lcore_id is not used here. */ int rte_power_monitor_wakeup(const unsigned int lcore_id) { RTE_SET_USED(lcore_id); +#ifdef RTE_ARM_USE_WFE + __RTE_ARM_SEV() + + return 0; +#else return -ENOTSUP; +#endif } int From patchwork Fri Nov 11 07:26:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Feifei Wang X-Patchwork-Id: 119770 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 034ACA0542; Fri, 11 Nov 2022 08:27:16 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 1B3B942D1D; Fri, 11 Nov 2022 08:27:09 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id CBC3942D1A for ; Fri, 11 Nov 2022 08:27:07 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 305F61FB; Thu, 10 Nov 2022 23:27:13 -0800 (PST) Received: from net-x86-dell-8268.shanghai.arm.com (net-x86-dell-8268.shanghai.arm.com [10.169.210.116]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 642583F534; Thu, 10 Nov 2022 23:27:04 -0800 (PST) From: Feifei Wang To: David Hunt Cc: dev@dpdk.org, david.marchand@redhat.com, thomas@monjalon.net, stephen@networkplumber.org, nd@arm.com, Feifei Wang , Ruifeng Wang Subject: [PATCH v3 3/3] examples/l3fwd-power: enable PMD power monitor on Arm Date: Fri, 11 Nov 2022 15:26:49 +0800 Message-Id: <20221111072649.3304429-4-feifei.wang2@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221111072649.3304429-1-feifei.wang2@arm.com> References: <20220825064251.2637274-1-feifei.wang2@arm.com> <20221111072649.3304429-1-feifei.wang2@arm.com> MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org For Arm aarch, power monitor uses WFE instruction to enable, which can not exit automatically within the time limit. This means 'rte_power_monitor_wakeup' API needs to be called to wake up sleep cores if there is no store operation to monitored address. Furthermore, we disable power monitor feature on the main core so that it can be used to wake up other sleeping cores after it exit from loop. Signed-off-by: Feifei Wang Reviewed-by: Ruifeng Wang Acked-by: David Hunt --- examples/l3fwd-power/main.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c index fd3ade330f..7c41159c43 100644 --- a/examples/l3fwd-power/main.c +++ b/examples/l3fwd-power/main.c @@ -3006,6 +3006,18 @@ main(int argc, char **argv) "Error setting scaling freq max: err=%d, lcore %d\n", ret, lcore_id); +#if defined(RTE_ARCH_ARM64) + /* Ensure the main lcore does not enter the power-monitor state, + * so that it can be used to wake up other lcores on ARM. + * This is due to WFE instruction has no timeout wake-up mechanism, + * and if users want to exit actively, the main lcore is needed + * to send SEV instruction to wake up other lcores. + */ + unsigned int main_lcore = rte_get_main_lcore(); + if (lcore_id == main_lcore && + pmgmt_type == RTE_POWER_MGMT_TYPE_MONITOR) + continue; +#endif ret = rte_power_ethdev_pmgmt_queue_enable( lcore_id, portid, queueid, pmgmt_type); @@ -3113,6 +3125,19 @@ main(int argc, char **argv) if (app_mode == APP_MODE_EMPTY_POLL || app_mode == APP_MODE_TELEMETRY) launch_timer(rte_lcore_id()); + /* wake up all worker cores from sleeping state */ + if (pmgmt_type == RTE_POWER_MGMT_TYPE_MONITOR) { + for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) { + if (rte_lcore_is_enabled(lcore_id) == 0) + continue; + + if (lcore_id == rte_get_main_lcore()) + continue; + + rte_power_monitor_wakeup(lcore_id); + } + } + RTE_LCORE_FOREACH_WORKER(lcore_id) { if (rte_eal_wait_lcore(lcore_id) < 0) return -1;