aiphs: adaptive profiling hardware sub-system
TRANSCRIPT
--> Local Memory Bus
--> Fast Simplex Link
--> AMBA APB, AHB, AXI
--> Fast Simplex Link
--> AMBA APB, AXI
--> Event Monitor
--> Time Monitor
GM InterfaceLibrary
NucleusLibrary
LIBRARY
Target Bus Adapter Library
GM InterfaceLibrary
NucleusLibrary
Target Bus Adapter Library
LEON3 LEON3
EthernetMAC LEON3 AHB/APB
Bridge
MemoryController
PHY
AMBA AHB
AMBA APB
UART
UART - USB
SDRAMS1 S2 S3
LEON3
ARM
ARM MemoryController
UARTController
MicroBlaze
USB
SDRAM
ARM
ARM
MemoryController
S2 S3
S5 S4MicroBlaze
S1
S6AXI
Controller mailb
oxS0
Target Bus Adapter
GM Interface Nucleus
SNIFFER
LEON3 PLATFORM
MICROBLAZE PLATFORM
SYSTEM BEHAVIOUR
Actual implementation of AIPHS library, that contains elements to target reconfigurable platforms based on Xilinx IP-Cores and Gaisler IP-Cores.
Proposed profiling technique follows the approach of runtime bus sampling.
Event monitor: strobe generation (ld_ac_event) during access on specified address range (delimited by sig_out_inf and sig_out_sup).
Time monitor: counter activated by read operation (during_read) and stopped by write operation (during_write), both on specified address (0x808).
SYSTEM DESCRIPTION
OVERVIEW
Monitoring a system during its life cycle can provide useful information to trace profiles of
behavior at different level of granularity.
This operation can be the starting point to drive different actions, such as the reconfiguration
of the platform or a change in the scheduling policy.
In the area of Embedded SoC a monitoring system should be customizable, since different
behaviors can be required to be analyzed. Profiling systems on reconfigurable logic offer an
interesting perspective to look for this characteristic.
1)
2)
3)
This demo presents AIPHS, a library of hardware elements oriented to support the develop-
ment of customized monitoring solutions. The use of AIPHS will be shown by illustrating:
--> a customization for stalls identification in a message passing scenario
--> a customization for bus utilization monitoring in a symmetric multi-processing system
scenario (based on four Leon3 running a custom Linux kernel)
PROPOSED WORKMOTIVATIONS
AIPHS IS A LIBRARY OF HARDWARE ELEMENTS FOR RECONFIGURABLE PLATFORMS TO SUPPORT THE DEVELOPMENT OF MONITORING SOLUTIONS CUSTOMIZED TO PROFILE THE RUNTIME BEHAVIOUR OF A SYSTEM, WITHOUT INTRODUCING SOFTWARE OVERHEAD.
AIPHS AdaptIve Profiling Hardware Sub-system
G. Valente, A. Bufalino, V. Muttillo, M. Santic, L. Pomante, M. Faccio, F. Federici
Main Contacts: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected],
UNIVERSITA’ degli STUDI dell’AQUILA - CENTER of EXCELLENCE DEWS (ITALY)http://dews.univaq.it