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Sat, 16 Mar 2019 19:01:54 +0000 Received: from CY4PR1801MB1863.namprd18.prod.outlook.com ([fe80::286d:5e93:974e:8bfa]) by CY4PR1801MB1863.namprd18.prod.outlook.com ([fe80::286d:5e93:974e:8bfa%2]) with mapi id 15.20.1709.011; Sat, 16 Mar 2019 19:01:54 +0000 From: Pavan Nikhilesh Bhagavatula To: Jerin Jacob Kollanukkaran , "keith.wiles@intel.com" , "stephen@networkplumber.org" , "thomas@monjalon.net" CC: "dev@dpdk.org" , Pavan Nikhilesh Bhagavatula Thread-Topic: [dpdk-dev] [PATCH v3 2/2] eal: roundup tsc frequency when estimating Thread-Index: AQHU3Cq4h55QmGkhokGXfqu7l8ONFA== Date: Sat, 16 Mar 2019 19:01:54 +0000 Message-ID: <20190316190119.6142-2-pbhagavatula@marvell.com> References: <20181129083138.23029-1-pbhagavatula@caviumnetworks.com> <20190316190119.6142-1-pbhagavatula@marvell.com> In-Reply-To: <20190316190119.6142-1-pbhagavatula@marvell.com> Accept-Language: en-IN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BM1PR01CA0160.INDPRD01.PROD.OUTLOOK.COM (2603:1096:b00:68::30) To CY4PR1801MB1863.namprd18.prod.outlook.com (2603:10b6:910:7a::14) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.21.0 x-originating-ip: [115.113.156.3] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 864fa42b-6c10-41ee-ccc0-08d6aa41da95 x-microsoft-antispam: BCL:0; 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FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: marvell.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: vgZ1rL9B3/mUyUPGmtDrWoJr3hkIj+K2M3Z1b46Ha0En7Kxch1N1OUDnI8zEm0+3/BKcGsxD65kSCmzLVV3FEdBRGyiIR/D3NgsaNJyjvKz9WU3tgTh1YVGGut3K8eJRpmWGDEE8d2NGCclxN5+Uk0Fr6lpCnXfTr7M5BMoC4EZ7yDb/fjhlpt4l3KkJg4718xzoU/JUFBpLqBU3D47AfzuPYKVsJQ4YidZn5AcKcFhlSq5oB5jFb2H3Y39sCry1NJEORppGNdNm/PHrIXs0YCB5rcvWess0o0scW4CdgLzq5095GrXt6VoiQkyHAPRutxp/AXI4Kh/h99tpvdJRlj5OPjxilAsCQHHCX4Eyzrk/Xmh1XtiR3roUAymfdgOmLzH4Lgv4smBkVumjBHImfVKL6J1uFHREQNLa5aVE1gQ= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 864fa42b-6c10-41ee-ccc0-08d6aa41da95 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Mar 2019 19:01:54.1814 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR1801MB1879 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-03-16_15:, , signatures=0 Subject: [dpdk-dev] [PATCH v3 2/2] eal: roundup tsc frequency when estimating X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 16 Mar 2019 19:02:09 -0000 From: Pavan Nikhilesh When estimating tsc frequency using sleep/gettime round it up to the nearest multiple of 10Mhz for more accuracy. Signed-off-by: Pavan Nikhilesh Reviewed-by: Keith Wiles --- Useful in case of ARM64 if we enable RTE_ARM_EAL_RDTSC_USE_PMU, get_tsc_freq_arch() will return 0 as there is no instruction to determine the clk of PMU and eal falls back to sleep(1). lib/librte_eal/common/eal_common_timer.c | 4 +++- lib/librte_eal/linux/eal/eal_timer.c | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/librte_eal/common/eal_common_timer.c b/lib/librte_eal/comm= on/eal_common_timer.c index dcf26bfea..68d67e684 100644 --- a/lib/librte_eal/common/eal_common_timer.c +++ b/lib/librte_eal/common/eal_common_timer.c @@ -64,12 +64,14 @@ rte_get_tsc_hz(void) static uint64_t estimate_tsc_freq(void) { +#define CYC_PER_10MHZ 1E7 RTE_LOG(WARNING, EAL, "WARNING: TSC frequency estimated roughly" " - clock timings may be less accurate.\n"); /* assume that the sleep(1) will sleep for 1 second */ uint64_t start =3D rte_rdtsc(); sleep(1); - return rte_rdtsc() - start; + /* Round up to 10Mhz. 1E7 ~ 10Mhz */ + return RTE_ALIGN_MUL_NEAR(rte_rdtsc() - start, CYC_PER_10MHZ); } void diff --git a/lib/librte_eal/linux/eal/eal_timer.c b/lib/librte_eal/linux/ea= l/eal_timer.c index bc8f05199..76ec17034 100644 --- a/lib/librte_eal/linux/eal/eal_timer.c +++ b/lib/librte_eal/linux/eal/eal_timer.c @@ -232,6 +232,7 @@ get_tsc_freq(void) { #ifdef CLOCK_MONOTONIC_RAW #define NS_PER_SEC 1E9 +#define CYC_PER_10MHZ 1E7 struct timespec sleeptime =3D {.tv_nsec =3D NS_PER_SEC / 10 }; /* 1/10 se= cond */ @@ -248,7 +249,8 @@ get_tsc_freq(void) double secs =3D (double)ns/NS_PER_SEC; tsc_hz =3D (uint64_t)((end - start)/secs); - return tsc_hz; + /* Round up to 10Mhz. 1E7 ~ 10Mhz */ + return RTE_ALIGN_MUL_NEAR(tsc_hz, CYC_PER_10MHZ); } #endif return 0; -- 2.21.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 8F135A0096 for ; Sat, 16 Mar 2019 20:02:10 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 54F63375B; Sat, 16 Mar 2019 20:02:10 +0100 (CET) Received: from mx0b-0016f401.pphosted.com (mx0b-0016f401.pphosted.com [67.231.156.173]) by dpdk.org (Postfix) with ESMTP id 379A711A4 for ; 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Sat, 16 Mar 2019 19:01:54 +0000 Received: from CY4PR1801MB1863.namprd18.prod.outlook.com ([fe80::286d:5e93:974e:8bfa]) by CY4PR1801MB1863.namprd18.prod.outlook.com ([fe80::286d:5e93:974e:8bfa%2]) with mapi id 15.20.1709.011; Sat, 16 Mar 2019 19:01:54 +0000 From: Pavan Nikhilesh Bhagavatula To: Jerin Jacob Kollanukkaran , "keith.wiles@intel.com" , "stephen@networkplumber.org" , "thomas@monjalon.net" CC: "dev@dpdk.org" , Pavan Nikhilesh Bhagavatula Thread-Topic: [dpdk-dev] [PATCH v3 2/2] eal: roundup tsc frequency when estimating Thread-Index: AQHU3Cq4h55QmGkhokGXfqu7l8ONFA== Date: Sat, 16 Mar 2019 19:01:54 +0000 Message-ID: <20190316190119.6142-2-pbhagavatula@marvell.com> References: <20181129083138.23029-1-pbhagavatula@caviumnetworks.com> <20190316190119.6142-1-pbhagavatula@marvell.com> In-Reply-To: <20190316190119.6142-1-pbhagavatula@marvell.com> Accept-Language: en-IN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BM1PR01CA0160.INDPRD01.PROD.OUTLOOK.COM (2603:1096:b00:68::30) To CY4PR1801MB1863.namprd18.prod.outlook.com (2603:10b6:910:7a::14) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.21.0 x-originating-ip: [115.113.156.3] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 864fa42b-6c10-41ee-ccc0-08d6aa41da95 x-microsoft-antispam: BCL:0; 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FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: marvell.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: vgZ1rL9B3/mUyUPGmtDrWoJr3hkIj+K2M3Z1b46Ha0En7Kxch1N1OUDnI8zEm0+3/BKcGsxD65kSCmzLVV3FEdBRGyiIR/D3NgsaNJyjvKz9WU3tgTh1YVGGut3K8eJRpmWGDEE8d2NGCclxN5+Uk0Fr6lpCnXfTr7M5BMoC4EZ7yDb/fjhlpt4l3KkJg4718xzoU/JUFBpLqBU3D47AfzuPYKVsJQ4YidZn5AcKcFhlSq5oB5jFb2H3Y39sCry1NJEORppGNdNm/PHrIXs0YCB5rcvWess0o0scW4CdgLzq5095GrXt6VoiQkyHAPRutxp/AXI4Kh/h99tpvdJRlj5OPjxilAsCQHHCX4Eyzrk/Xmh1XtiR3roUAymfdgOmLzH4Lgv4smBkVumjBHImfVKL6J1uFHREQNLa5aVE1gQ= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 864fa42b-6c10-41ee-ccc0-08d6aa41da95 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Mar 2019 19:01:54.1814 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR1801MB1879 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-03-16_15:, , signatures=0 Subject: [dpdk-dev] [PATCH v3 2/2] eal: roundup tsc frequency when estimating X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Message-ID: <20190316190154.eyBReGQCPTN3OkSRdFsGktAjGjW74FGg8IkZ5RdUXfY@z> From: Pavan Nikhilesh When estimating tsc frequency using sleep/gettime round it up to the nearest multiple of 10Mhz for more accuracy. Signed-off-by: Pavan Nikhilesh Reviewed-by: Keith Wiles --- Useful in case of ARM64 if we enable RTE_ARM_EAL_RDTSC_USE_PMU, get_tsc_freq_arch() will return 0 as there is no instruction to determine the clk of PMU and eal falls back to sleep(1). lib/librte_eal/common/eal_common_timer.c | 4 +++- lib/librte_eal/linux/eal/eal_timer.c | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/librte_eal/common/eal_common_timer.c b/lib/librte_eal/comm= on/eal_common_timer.c index dcf26bfea..68d67e684 100644 --- a/lib/librte_eal/common/eal_common_timer.c +++ b/lib/librte_eal/common/eal_common_timer.c @@ -64,12 +64,14 @@ rte_get_tsc_hz(void) static uint64_t estimate_tsc_freq(void) { +#define CYC_PER_10MHZ 1E7 RTE_LOG(WARNING, EAL, "WARNING: TSC frequency estimated roughly" " - clock timings may be less accurate.\n"); /* assume that the sleep(1) will sleep for 1 second */ uint64_t start =3D rte_rdtsc(); sleep(1); - return rte_rdtsc() - start; + /* Round up to 10Mhz. 1E7 ~ 10Mhz */ + return RTE_ALIGN_MUL_NEAR(rte_rdtsc() - start, CYC_PER_10MHZ); } void diff --git a/lib/librte_eal/linux/eal/eal_timer.c b/lib/librte_eal/linux/ea= l/eal_timer.c index bc8f05199..76ec17034 100644 --- a/lib/librte_eal/linux/eal/eal_timer.c +++ b/lib/librte_eal/linux/eal/eal_timer.c @@ -232,6 +232,7 @@ get_tsc_freq(void) { #ifdef CLOCK_MONOTONIC_RAW #define NS_PER_SEC 1E9 +#define CYC_PER_10MHZ 1E7 struct timespec sleeptime =3D {.tv_nsec =3D NS_PER_SEC / 10 }; /* 1/10 se= cond */ @@ -248,7 +249,8 @@ get_tsc_freq(void) double secs =3D (double)ns/NS_PER_SEC; tsc_hz =3D (uint64_t)((end - start)/secs); - return tsc_hz; + /* Round up to 10Mhz. 1E7 ~ 10Mhz */ + return RTE_ALIGN_MUL_NEAR(tsc_hz, CYC_PER_10MHZ); } #endif return 0; -- 2.21.0