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

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	800 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 : 461 KB
• Boot Media Clock : 166.667 MHz
• Mode : PHY enabled, DMA enabled
• Protocol : 8D-8D-8D

SBL boot time breakdown	Time (us)
TIFS init	614
System_init	1886
Board_init	2
FreeRtosTask Create	255
Drivers_open	96
Board_driversOpen	0
sciServer_init	15061
SBL Drivers_open	3172
SBL Board_driversOpen	2929
Sciclient Get Version	10014
R5FSS0_0 Image Load	1617
R5FSS0_1 Image Load	1565
R5FSS1_0 Image Load	1569
R5FSS1_1 Image Load	1556
DSP 0 Image Load	6969
DSP 1 Image Load	6794
------------------------------—	-----------—
SBL Total Time Taken	54107

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 : 460 KB
• Boot Media Clock : 133.333 MHz
• Mode : PHY enabled, DMA enabled
• Protocol : 8D-8D-8D

SBL boot time breakdown	Time (us)
TIFS init	765
System_init	1877
Board_init	2
FreeRtosTask Create	256
Drivers_open	98
Board_driversOpen	0
sciServer_init	15070
SBL Drivers_open	3170
SBL Board_driversOpen	112
Sciclient Get Version	10019
R5FSS0_0 Image Load	1656
R5FSS0_1 Image Load	1599
R5FSS1_0 Image Load	1603
R5FSS1_1 Image Load	1585
DSP 0 Image Load	7075
DSP 1 Image Load	6908
------------------------------—	-----------—
SBL Total Time Taken	51801

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)
  • 37.52524 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)
  • 72.69178 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 : 461 KB
• Boot Media Clock : 200.00 MHz
• Mode : HS200

SBL boot time breakdown	Time (us)
TIFS init	500
System_init	700
Board_init	0
FreeRtosTask Create	255
Drivers_open	57
Board_driversOpen	0
sciServer_init	103
SBL Drivers_open	18196
Sciclient Get Version	10047
R5FSS0_0 Image Load	11872
R5FSS0_1 Image Load	11529
R5FSS1_0 Image Load	10814
R5FSS1_1 Image Load	11525
DSP 0 Image Load	18333
DSP 1 Image Load	15761
------------------------------—	-----------—
SBL Total Time Taken	109696

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	1.300
r5f0-0	r5f0-1	1.279
r5f0-0	r5f1-0	1.386
r5f0-0	r5f1-1	1.265
r5f0-0	c75ss0-0	1.174
r5f0-0	c75ss1-0	1.173

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	8.290	9
  r5f0-0	r5f0-1	64	10.049	10
  r5f0-0	r5f0-1	112	12.805	13
  r5f0-0	r5f1-0	32	8.225	9
  r5f0-0	r5f1-0	64	9.982	10
  r5f0-0	r5f1-0	112	12.750	13
  r5f0-0	r5f1-1	32	8.293	9
  r5f0-0	r5f1-1	64	10.048	10
  r5f0-0	r5f1-1	112	12.812	13
  r5f0-0	c75ss0-0	32	9.474	10
  r5f0-0	c75ss0-0	64	10.301	11
  r5f0-0	c75ss0-0	112	11.579	13
  r5f0-0	c75ss1-0	32	9.467	10
  r5f0-0	c75ss1-0	64	10.261	11
  r5f0-0	c75ss1-0	112	11.553	13

EMMC Performance

Mode	Data size(MiB)	Write speed(MiBps)	Read speed(MiBps)
SDR50	1	9.40	45.02
DDR50	1	15.03	82.00
HS200	1	98.67	158.08

OSPI NOR Flash Performance

• Flash protocol: FLASH_CFG_PROTO_8D_8D_8D
• PHY : enabled
• DMA : enabled

Data size(MiB)	Write speed(MiBps)	Read speed(MiBps)
1	0.43	284.09
2	0.43	284.60

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	69957
Code/Data not cached 1 of 10 iterations	28257

• 2) MEMCPY operation

Caching status	Cycles taken
Code/Data fully cached	1564
Code/Data not cached	3661
Code/Data not cached 1 of 10 iterations	1865