[#5234] /proc/maps (/proc/<pid>/maps) does not show SRAM usage

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[#5234] /proc/maps (/proc/<pid>/maps) does not show SRAM usage

Submitted By: Yi Li

Open Date

2009-06-11 04:12:29     Close Date

2010-06-11 04:15:42

Priority:

Medium     Assignee:

Nobody

Status:

Closed     Fixed In Release:

N/A

Found In Release:

snaps     Release:

Category:

N/A     Board:

N/A

Processor:

ALL     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

Rejected

Uboot version or rev.:

    Toolchain version or rev.:

2009R1-RC7

App binary format:

FDPIC     

Summary: /proc/maps (/proc/<pid>/maps) does not show SRAM usage

Details:

 

Can we call it a bug?

 

Run a program (g729ab_testfdpic_so) in FDPIC format, linked with a shared library (/lib/g729ab.so). The shared library put data and code in L1. When the program running:

 

root:/> cat /proc/maps

00192000-00194000 rw-p 00000000 00:00 0

001b9000-001ba000 rw-p 00000000 00:00 0

00200000-00220000 rwxp 00000000 00:00 0

00220000-00228000 rw-p 00000000 00:00 0

00228000-0022b000 r-xp 00000000 00:01 115        /lib/libdl.so.0

00230000-0023c000 r-xp 00000000 00:01 110        /lib/libgcc_s.so.1

00240000-00279000 r-xp 00000000 00:01 20         /lib/libc.so.0

00742000-00743000 rw-p 00000000 00:00 0

00802000-00803000 rw-p 00000000 00:00 0

0080e000-00810000 rw-p 00000000 00:00 0

00812000-00814000 rw-p 00000000 00:00 0

00820000-0082a000 r-xp 00000000 00:01 26         /lib/libpthread.so.0

00840000-0085a000 rwxp 00000000 00:00 0

00874000-00875000 rw-p 00000000 00:00 0

00876000-00877000 rw-p 00000000 00:00 0

00877000-00878000 rw-p 00000000 00:00 0

0087b000-0087c000 r--p 00000000 00:01 1850       /lib/libg729ab.so

0091d000-0091e000 r--p 00008000 00:01 1850       /lib/libg729ab.so

02127000-02128000 rw-p 00000000 00:00 0

02651000-02652000 rw-p 00000000 00:00 0

0268f000-02690000 rw-p 00000000 00:00 0

026c6000-026c7000 rw-p 00000000 00:00 0

02752000-02753000 rw-p 00000000 00:00 0

0281b000-0281c000 rw-p 00000000 00:00 0

02844000-02845000 rw-p 00007000 00:01 112        /lib/ld-uClibc.so.0

028d3000-028d4000 rw-p 00000000 00:00 0

028d4000-028d7000 r-xp 00000000 00:0c 1862       /var/g729ab_testfdpic_so

028d8000-028e0000 r-xp 00000000 00:01 112        /lib/ld-uClibc.so.0

028e0000-02900000 rwxp 00000000 00:00 0

02900000-02905000 rw-p 00000000 00:00 0

02908000-0290d000 rw-p 00000000 00:00 0

02914000-02916000 rw-p 00000000 00:00 0

02916000-02918000 rw-p 00000000 00:00 0

02920000-0292c000 rwxp 00000000 00:00 0

02980000-029ea000 rwxp 00000000 00:00 0

02a00000-02a6a000 rwxp 00000000 00:00 0

03220000-03229000 rwxp 00000000 00:00 0

03238000-03240000 rwxp 00000000 00:00 0

03280000-032ea000 rwxp 00000000 00:00 0

03300000-0336a000 rwxp 00000000 00:00 0

03380000-033ea000 rwxp 00000000 00:00 0

034ed000-034ee000 rw-p 00002000 00:0c 1862       /var/g729ab_testfdpic_so

03785000-03786000 rw-p 00000000 00:00 0

0379a000-0379c000 rw-p 00000000 00:00 0

 

And:

 

root:/> cat /proc/192/maps

00200000-00220000 rwxp 00000000 00:00 0

00220000-00228000 rw-p 00000000 00:00 0

00228000-0022b000 r-xp 00000000 00:01 115        /lib/libdl.so.0

00230000-0023c000 r-xp 00000000 00:01 110        /lib/libgcc_s.so.1

00240000-00279000 r-xp 00000000 00:01 20         /lib/libc.so.0

00812000-00814000 rw-p 00000000 00:00 0

00820000-0082a000 r-xp 00000000 00:01 26         /lib/libpthread.so.0

0087b000-0087c000 r--p 00000000 00:01 1850       /lib/libg729ab.so

0091d000-0091e000 r--p 00008000 00:01 1850       /lib/libg729ab.so

02127000-02128000 rw-p 00000000 00:00 0

02651000-02652000 rw-p 00000000 00:00 0

026c6000-026c7000 rw-p 00000000 00:00 0

02844000-02845000 rw-p 00007000 00:01 112        /lib/ld-uClibc.so.0

028d4000-028d7000 r-xp 00000000 00:0c 1862       /var/g729ab_testfdpic_so

028d8000-028e0000 r-xp 00000000 00:01 112        /lib/ld-uClibc.so.0

02900000-02905000 rw-p 00000000 00:00 0

02908000-0290d000 rw-p 00000000 00:00 0

034ed000-034ee000 rw-p 00002000 00:0c 1862       /var/g729ab_testfdpic_so

0379a000-0379c000 rw-p 00000000 00:00 0

 

 

But we can see the process ( PID = "192") allocated L1 data and L2 instruction mem.

 

root:/> cat /proc/sram

--- SRAM Scratchpad     Size   PID State    

ffb00008-ffb01000       4088     0 FREE     

--- SRAM L1 Data A      Size   PID State    

ff800000-ff803e58      15960   165 ALLOCATED

ff803e58-ff804000        424     0 FREE     

--- SRAM L1 Data B      Size   PID State    

ff900320-ff9032e0      12224   192 ALLOCATED

ff900000-ff900320        800   165 ALLOCATED

ff9032e0-ff904000       3360     0 FREE     

--- SRAM L1 Instruction Size   PID State    

ffa01240-ffa094d0      33424   192 ALLOCATED

ffa094d0-ffa0c000      11056     0 FREE 

 

When the program finished:

 

root:/> cat /proc/sram

--- SRAM Scratchpad     Size   PID State    

ffb00008-ffb01000       4088     0 FREE     

--- SRAM L1 Data A      Size   PID State    

ff800000-ff803e58      15960   165 ALLOCATED

ff803e58-ff804000        424     0 FREE     

--- SRAM L1 Data B      Size   PID State    

ff900000-ff900320        800   165 ALLOCATED

ff900320-ff904000      15584     0 FREE     

--- SRAM L1 Instruction Size   PID State    

ffa01240-ffa0c000      44480     0 FREE

 

Follow-ups

 

--- Mike Frysinger                                           2009-06-11 04:16:21

this is currently by design -- we cannot safely hook into the vma system.  ask

Jie about it as he looked into it last time.

 

--- Sonic Zhang                                              2009-06-12 00:06:59

Not a bug

 

 

 

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