Datasheet

Table of Contents

• Generic Setup details
• Performance Numbers
  • SBL OSPI NOR performance (HS-FS)
  • SBL Fast-xSPI NOR performance (HS-FS)
    • R5FSS0_0 boot time using Fast-xSPI Bootmode
    • C7x audio chime time using Fast-xSPI Bootmode
  • SBL EMMC performance (HS-FS)
  • IPC performance
    • IPC NOTIFY
    • IPC RPMSG
  • EMMC Performance
  • OSPI NOR Flash Performance
  • XIP Benchmark
  • HYPERRAM Performance
  • HYPERRAM XIP benchmark
  • McASP (audio) Latency

This datasheet provides the performance numbers of various device drivers in FreeRTOS SDK for AM275X

Generic Setup details

SOC Details	Values
Core	R5F
Core Operating Speed	1000 MHz
Cache Status	Enabled

SOC Details	Values
Core	C75
Core Operating Speed	1000 MHz
Cache Status	Enabled

Optimization Details	Values
Build Profile	Release
R5F Compiler flags	-mcpu=cortex-r5 -mfloat-abi=hard -mfpu=vfpv3-d16 -Wall -Werror -g -mthumb -Wno-gnu-variable-sized-type-not-at-end -Wno-unused-function
R5F Linker flags	-Wl,–diag_suppress=10063 -Wl,–ram_model -Wl,–reread_libs
Code Placement	MSRAM
Data Placement	MSRAM
C7 Compiler flags	-mv7524 –abi=eabi -q -mo -pden -pds=238 -pds=880 -pds1110 –endian=little –disable_inlining -ea.se71 –emit_warnings_as_errors –diag_suppress=770 –diag_suppress=69 –diag_suppress=70 -Dxdc_target_name__=C71 –opt_level=3 –symdebug:none
C7 Linker flags	–silicon_version=7524 -z –emit_warnings_as_errors –diag_suppress=10063 –ram_model –warn_sections -q -x
Code Placement	MSRAM / L2RAM
Data Placement	MSRAM / L2RAM

Performance Numbers

SBL OSPI NOR performance (HS-FS)

• Software/Application used : sbl_ospi, ipc_rpmsg_echo
• Cores booted by SBL : r5fss0-0 r5fss0-1 r5fss1-0 r5fss1-1 c75ss0-0 c75ss1-0
• Size of images loaded : 462 KB
• Boot Media Clock : 166.667 MHz
• Mode : PHY enabled, DMA enabled
• Protocol : 8D-8D-8D

SBL boot time breakdown	Time (us)
TIFS init	609
System_init	1904
Board_init	7
FreeRtosTask Create	297
Drivers_open	5792
Board_driversOpen	159
sciServer_init	15075
SBL Drivers_open	3213
SBL Board_driversOpen	2977
Sciclient Get Version	10023
R5FSS0_0 Image Load	2169
R5FSS0_1 Image Load	1638
R5FSS1_0 Image Load	1634
R5FSS1_1 Image Load	1618
DSP 0 Image Load	6991
DSP 1 Image Load	6887
------------------------------—	-----------—
SBL Total Time Taken	60999

SBL Fast-xSPI NOR performance (HS-FS)

• Software/Application used : sbl_ospi, ipc_rpmsg_echo
• Cores booted by SBL : r5fss0-0 r5fss0-1 r5fss1-0 r5fss1-1 c75ss0-0 c75ss1-0
• Size of images loaded : 462 KB
• Boot Media Clock : 133.333 MHz
• Mode : PHY enabled, DMA enabled
• Protocol : 8D-8D-8D

SBL boot time breakdown	Time (us)
TIFS init	838
System_init	1902
Board_init	6
FreeRtosTask Create	297
Drivers_open	5792
Board_driversOpen	159
sciServer_init	15082
SBL Drivers_open	3215
SBL Board_driversOpen	192
Sciclient Get Version	10019
R5FSS0_0 Image Load	2129
R5FSS0_1 Image Load	1609
R5FSS1_0 Image Load	1605
R5FSS1_1 Image Load	1590
DSP 0 Image Load	7027
DSP 1 Image Load	6932
------------------------------—	-----------—
SBL Total Time Taken	58402

R5FSS0_0 boot time using Fast-xSPI Bootmode

For how to enable Fast XSPI boot refer Using Fast-xSPI Bootmode

• GPIO toggle time from R5FSS0_0 (Measured from PORz)
  • 47 ms
• Cores booted by SBL : r5fss0-0, r5fss0-1, r5fss1-0, r5fss1-1, c75ss0-0, c75ss1-0
• R5FSS0-0 image size = ~ 1 MB and remaining cores by default ipc rpmsg images

C7x audio chime time using Fast-xSPI Bootmode

For how to enable Fast XSPI boot refer Using Fast-xSPI Bootmode

• C7x audio out time (Measured from PORz)
  • 80 ms
• Cores booted by SBL : r5fss0-0, r5fss0-1, r5fss1-0, r5fss1-1, c75ss0-0, c75ss1-0
• C75SS0-0 image size = ~ 1 MB and remaining cores by default ipc rpmsg images
• Includes DAC configuration time

SBL EMMC performance (HS-FS)

• Software/Application used : sbl_emmc, ipc_rpmsg_echo
• Cores booted by SBL : r5fss0-0 r5fss0-1 r5fss1-0 r5fss1-1 c75ss0-0 c75ss1-0
• Size of images loaded : 462 KB
• Boot Media Clock : 200.00 MHz
• Mode : HS200

SBL boot time breakdown	Time (us)
TIFS init	741
System_init	787
Board_init	3
FreeRtosTask Create	255
Drivers_open	6836
Board_driversOpen	158
sciServer_init	109
SBL Drivers_open	60898
Sciclient Get Version	10038
R5FSS0_0 Image Load	8813
R5FSS0_1 Image Load	6862
R5FSS1_0 Image Load	6860
R5FSS1_1 Image Load	6837
DSP 0 Image Load	12846
DSP 1 Image Load	12868
------------------------------—	-----------—
SBL Total Time Taken	134918

IPC performance

IPC NOTIFY

• 10000 messages are sent and average one way message latency is measured

Local Core	Remote Core	Average Message Latency (us)
c75ss0-0	c75ss1-0	1.500
r5f0-0	r5f0-1	1.135
r5f0-0	r5f1-0	1.266
r5f0-0	r5f1-1	1.121
r5f0-0	c75ss0-0	1.161
r5f0-0	c75ss1-0	1.163

IPC RPMSG

• 1000 messages are sent and average one way message latency is measured

  Local Core	Remote Core	Message Size	Average Message Latency (us)	Max Latency (us)
  r5f0-0	r5f0-1	32	6.980	7
  r5f0-0	r5f0-1	64	8.337	9
  r5f0-0	r5f0-1	112	10.524	11
  r5f0-0	r5f1-0	32	6.815	7
  r5f0-0	r5f1-0	64	8.265	9
  r5f0-0	r5f1-0	112	10.469	11
  r5f0-0	r5f1-1	32	6.969	7
  r5f0-0	r5f1-1	64	8.366	9
  r5f0-0	r5f1-1	112	10.524	11
  r5f0-0	c75ss0-0	32	8.564	10
  r5f0-0	c75ss0-0	64	9.239	10
  r5f0-0	c75ss0-0	112	10.262	11
  r5f0-0	c75ss1-0	32	8.776	10
  r5f0-0	c75ss1-0	64	9.425	10
  r5f0-0	c75ss1-0	112	10.495	11

EMMC Performance

Mode	Data size(MiB)	Write speed(MiBps)	Read speed(MiBps)
SDR50	1	26.20	45.23
DDR50	1	50.49	82.64
HS200	1	79.73	157.23

OSPI NOR Flash Performance

• Flash frequency: 25Mhz
• Flash protocol: FLASH_CFG_PROTO_8D_8D_8D
• Phy Condition: disabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.43	3.09
1	Yes	0.43	48.74

• Flash frequency: 50Mhz
• Flash protocol: FLASH_CFG_PROTO_1S_1S_1S
• Phy Condition: disabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.41	6.24
1	Yes	0.41	6.23

• Flash frequency: 133Mhz
• Flash protocol: FLASH_CFG_PROTO_8D_8D_8D
• Phy Condition: enabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.43	7.63
1	Yes	0.43	234.20

• Flash frequency: 166Mhz
• Flash protocol: FLASH_CFG_PROTO_8D_8D_8D
• Phy Condition: enabled

Data Size(MiB)	DMA Enabled	Write Speed(mbps)	Read Speed(mbps)
1	No	0.43	8.77
1	Yes	0.43	284.07

XIP Benchmark

• Core : R5F
• Core Operating Speed : 800 MHz
• Software/Application used : xip_benchmark
• 1) FIR operation

Caching status	Cycles taken
Code/Data fully cached	23906
Code/Data not cached	52861
Code/Data not cached 1 of 10 iterations	26850

• 2) MEMCPY operation

Caching status	Cycles taken
Code/Data fully cached	1564
Code/Data not cached	3892
Code/Data not cached 1 of 10 iterations	1800

HYPERRAM Performance

Transfer Mode	Write speed(MiBps)	Read speed(MiBps)
CPU	92.92	70.77
BCDMA	144.68	144.46

HYPERRAM XIP benchmark

• Core : R5F
• Core Operating Speed : 800 MHz
• Software/Application used : hyperRam_xip_benchmark
• 1) FIR operation

Caching status	Cycles taken
Code/Data fully cached	23913
Code/Data not cached	47805
Code/Data not cached 1 of 10 iterations	26303

• 2) MEMCPY operation

Caching status	Cycles taken
Code/Data fully cached	1564
Code/Data not cached	4295
Code/Data not cached 1 of 10 iterations	1838

McASP (audio) Latency

• McASP operating at 48KHz, I2C mode
• RX to TX pin to pin latency is measured
• Rx To Tx pin to pin latency ~126us