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| ID | Category | Severity | Reproducibility | Date Submitted | Last Update | ||||
| 0001242 | [uClibc] Architecture Specific | major | always | 03-01-07 11:39 | 09-15-07 02:17 | ||||
| Reporter | leochen | View Status | public | ||||||
| Assigned To | uClibc | ||||||||
| Priority | normal | Resolution | fixed | ||||||
| Status | closed | Product Version | 0.9.28 | ||||||
| Summary | 0001242: architecture optimized string function is not included in libc.a and libuClibc-0.9.28.so | ||||||||
| Description |
I build uClibc for ARM/MIPS platform. I've found the performance of "bcopy" in 0.9.28 release is much worse than the "bcopy" in 0.9.26 release. I disassembled the code of libc.a and libUclibc.so in both versions. I've found that a generic "bcopy" is included, instead of the architecture optimized version. A patch to fix that. --- uClibc-0.9.28/libc/Makefile 2007-02-28 14:51:01.019082000 -0800 +++ uClibc-0.9.28/libc/Makefile 2007-02-28 14:33:42.181885000 -0800 @@ -59,7 +59,7 @@ $(AR) dN 2 $(LIBNAME) $$objs && \ $(AR) dN 2 $(LIBNAME) $$objs @for objfile in obj.signal \ - obj.string.generic obj.string.$(TARGET_ARCH) obj.string \ + obj.string.generic obj.string obj.string.$(TARGET_ARCH) \ obj.sysdeps.common obj.sysdeps.$(TARGET_ARCH) ; do \ if [ -e $$objfile ] ; then \ if [ "$(MAKE_IS_SILENT)" = "n" ] ; then \ |
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| Additional Information |
The function included in libc.a ------------ bcopy.o: file format elf32-bigarm Disassembly of section .text: 00000000 <bcopy>: 0: e1a03000 mov r3, r0 4: e1a00001 mov r0, r1 8: e1a01003 mov r1, r3 c: eafffffe b 0 <memmove> The optimized version. -------------- bcopy.o: file format elf32-bigarm Disassembly of section .text: 00000000 <bcopy>: 0: e0210000 eor r0, r1, r0 4: e0201001 eor r1, r0, r1 8: e0210000 eor r0, r1, r0 c: eafffffe b 0 <_memcpy> |
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Notes |
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(0002748) vapier 09-15-07 02:17 |
should be fixed with new build system with 0.9.29 |
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Issue History |
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| Date Modified | Username | Field | Change |
| 03-01-07 11:39 | leochen | New Issue | |
| 03-01-07 11:39 | leochen | Status | new => assigned |
| 03-01-07 11:39 | leochen | Assigned To | => uClibc |
| 09-15-07 02:17 | vapier | Note Added: 0002748 | |
| 09-15-07 02:17 | vapier | Status | assigned => closed |
| 09-15-07 02:17 | vapier | Resolution | open => fixed |
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