- linaro-toolchain - lists.linaro.org

by Yvan Roux

One day off this week. == Issues == * None == Progress == * Linaro GCC 4.8, 4.7 and 4. 2013.04 released (with CL and MG) * Boehm-gc AArch64 support backport in GCC: - support committed. * Libunwind AArch64 support: - Resumed ongoing work. == Plan == * Libunwind AArch64 support: - Fix and submit upstream

12 years, 4 months

1
0
0 0

[ACTIVITY] 8 - 12 April 2013

by Omair Javaid

== Progress == * Started investigating dwarf test suite failures on ARM. * Created a new comparison between arm native gdb and arm remote gdb. * More investigation of test cases to figure out causes of test cases that are not run or unsupported. * Experimentation with screens on gateway to speed up remote debugging, didnt work. * 1:1 with Matt. * Took a day off on Friday 12th April 2013 for car checkup in workshop. * Received Invitation letter from Arwen on Friday which means now visa application only needs hotel booking information. *** Still No blue-print available to log work in JIRA. == Plan == * Setup arm gdb to debug itself and debug dwarf problems on arm. * Fill up the arm native vs arm remote comparison sheet. * Submit Ireland visa application after receiving invitation letter and hotel booking details. * Setup screens for remote testing using toolchain cbuild infrastructure.

12 years, 4 months

1
0
0 0

[ACTIVITY] 8-12 April 2013

by Venkataramanan Kumar

== Progress == * gc sections tests Completed upstream of g-c section patches after updating review comments. Closed the card associated with the work. http://cards.linaro.org/browse/TCWG-27 * gprof support work for Aarch64 Read gprof internal documents from sourceware.org. Working on GCC side to support gprof for Aarch64. Misc ------ 11-4-2013 was a local holiday. == Plan == * Continue gprof support work for Aarch64 * Attend internal team meetings on 16 and 17th.

12 years, 4 months

1
0
0 0

[ACTIVITY] 8-12 April 2013

by Kugan

== Summary == - http://cards.linaro.org/browse/TCWG-14 Coremark ARM mode gives about 2% performance improvement with about 1% code size reduction. Thumb2 mode however has performance regression even though code size reduces about 0.6%. Performance regression here is like what we are seeing in EPILOGUE_UESES changes(http://cards.linaro.org/browse/TCWG-13). Spawned spec in CBUILD to see the impact with spec2000. - http://cards.linaro.org/browse/TCWG-13 Thumb2 mode performance regression is due to the percentage of time spent in core_state_transition. Looks like an alignment issue; same asm is generated for this function with the patch. Investigating it. == Plan == - Plan to resolve http://cards.linaro.org/browse/TCWG-13 this week. - Get spec2000 results for http://cards.linaro.org/browse/TCWG-14 to decide on the next step

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 15

by Will Newton

== Progress == * Setting up Chromebook with Ubuntu 13.04. * Developing patch to integrate new memcpy into glibc with IFUNC. * Debugging and submitting a patch for linker issue with IFUNC. == Issues == * None. == Plan == * Get newlib mempcy patch accepted. * Follow up memcpy in bionic. * Submit memcpy IFUNC patch to glibc list. * Get binutils tests into cbuild. -- Will Newton Toolchain Working Group, Linaro

12 years, 4 months

1
0
0 0

[ACTIVITY] report week 15

by Peter Maydell

Progress: * qemu maintenance ** rebased qemu-linaro again ** preparing for upstream softfreeze on 15th ** review virtio patches and anything else that needs attention pre-freeze ** scan of buglist; provided analysis of problem for LP:1090038, closed a few stale bugs ** fixed a bug in an edgecase in fused multiply-accumulate emulation * VIRT-4 [Guest migration support for KVM] ** VIRT-51 *** patches committed upstream, work item complete ** VIRT-73 *** updated Juan's patches to use VMState for ARM CPU migration, fixed a few bugs noted along the way, submitted upstream [work item now just pending review & commit] Plans: * qemu maintenance * VIRT-4 ** VIRT-49 -- PMM

12 years, 4 months

1
0
0 0

[ANNOUNCE] Linaro GCC 4.8, 4.7 and 4.6 2013.04 released

by Yvan Roux

The Linaro Toolchain Working Group is pleased to announce the 2013.04 release of Linaro GCC 4.8, Linaro GCC 4.7 and Linaro GCC 4.6. Linaro GCC 4.8 2013.04 is the first release in the 4.8 series. Based off the latest GCC 4.8.0+svn197294 release, it includes performance improvements and bug fixes. Interesting changes include: * Our first 4.8 based release * Updates to GCC 4.8.0+svn197294 * Initial optimized support for Cortex-A53 for arm*-*-* targets * Improved support for new ARMv8-A instructions for arm*-*-* and aarch64*-*-* targets. * Backport of optimizations concerning whether to use Neon for 64-bit bitops for arm*-*-* targets. Linaro GCC 4.7 2013.04 is the thirteenth and last development release in the 4.7 series before entering maintenance. Based off the latest GCC 4.7.2+svn197188 release, it includes ARM-focused performance improvements and bug fixes. Interesting changes include: * Updates to GCC 4.7.2+svn197188 * Includes arm/aarch64-4.7-branch up to svn revision 196381 * Backport vectorizer cost model * Turn off 64-bit Bitops in Neon Linaro GCC 4.6 2013.04 is the 26th release in the 4.6 series. Based off the latest GCC 4.6.3+svn197511 release, this is the thirteenth release after entering maintenance and the last regular one. Interesting changes include: * Updates to 4.6.3+svn197511 The source tarballs are available from: https://launchpad.net/gcc-linaro/+milestone/4.8-2013.04 https://launchpad.net/gcc-linaro/+milestone/4.7-2013.04 https://launchpad.net/gcc-linaro/+milestone/4.6-2013.04 Downloads are available from the Linaro GCC page on Launchpad: https://launchpad.net/gcc-linaro More information on the features and issues are available from the release pages: https://launchpad.net/gcc-linaro/4.8/4.8-2013.04 https://launchpad.net/gcc-linaro/4.7/4.7-2013.04 https://launchpad.net/gcc-linaro/4.6/4.6-2013.04 Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain Bugs: https://bugs.launchpad.net/gcc-linaro/ Questions? https://ask.linaro.org/ Interested in commercial support? Inquire at support(a)linaro.org

12 years, 4 months

1
0
0 0

cbuild binutils job

by Will Newton

Hi all, Currently the binutils job that gets run via cbuild configures with --enable-gold. I guess this could be useful to ensure the gold build is not broken, but has the downside of slowing down the build and causing make check to fail. I propose we do not enable gold until such a time as we wish to formally support gold and fix the broken make check. Does anybody have any objections to doing that? Thanks, -- Will Newton Toolchain Working Group, Linaro

12 years, 4 months

2
1
0 0

[PATCH] libhadoop: CRC: ARM NEON support.

by Steve Capper

Hello linaro-toolchain, This is a patch to add a NEON optimised buffer folding routine to Hadoop 2.0.2-alpha. It allows for faster CRC32c checksum computation. The code is in the form of NEON intrinsics, and details of the implementation can be found at: https://wiki.linaro.org/LEG/Engineering/CRC This patch is against Hadoop 2.0.2-alpha: https://github.com/apache/hadoop-common/tree/branch-2.0.2-alpha I've sent this to linaro-toolchain because I would like the NEON intrinsic implementation to be scrutinised. I would be particularly interested in any superfluous instructions being identified or any bad practices that could be cleaned up before opening these patches up more. Any comments/critique would really be appreciated. Thanks, -- Steve Signed-off-by: Steve Capper <steve.capper(a)linaro.org> --- .../hadoop-common/src/JNIFlags.cmake | 2 + .../native/src/org/apache/hadoop/util/bulk_crc32.c | 142 +++++++++++++++++++- 2 files changed, 142 insertions(+), 2 deletions(-) diff --git a/hadoop-common-project/hadoop-common/src/JNIFlags.cmake b/hadoop-common-project/hadoop-common/src/JNIFlags.cmake index aba4c18..5c9336a 100644 --- a/hadoop-common-project/hadoop-common/src/JNIFlags.cmake +++ b/hadoop-common-project/hadoop-common/src/JNIFlags.cmake @@ -36,6 +36,8 @@ endif (JVM_ARCH_DATA_MODEL EQUAL 32) # Determine float ABI of JVM on ARM Linux if (CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" AND CMAKE_SYSTEM_NAME STREQUAL "Linux") + message("Enabling NEON support.") + set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon") find_program(READELF readelf) if (READELF MATCHES "NOTFOUND") message(WARNING "readelf not found; JVM float ABI detection disabled") diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32.c index 8822b5c..6282c60 100644 --- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32.c +++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32.c @@ -41,6 +41,16 @@ static inline uint32_t crc_val(uint32_t crc); static uint32_t crc32_zlib_sb8(uint32_t crc, const uint8_t *buf, size_t length); uint32_t crc32c_sb8(uint32_t crc, const uint8_t *buf, size_t length); +#ifdef __ARM_NEON__ +#include <arm_neon.h> +static uint32_t crc32c_neon(uint32_t crc, const uint8_t *buf, size_t length); +#undef USE_PIPELINED +#define CRC32C_FUNC crc32c_neon +#else +#define CRC32C_FUNC crc32c_sb8 +#endif /* __ARM_NEON__ */ + + #ifdef USE_PIPELINED static void pipelined_crc32c(uint32_t *crc1, uint32_t *crc2, uint32_t *crc3, const uint8_t *p_buf, size_t block_size, int num_blocks); #endif @@ -58,7 +68,7 @@ int bulk_calculate_crc(const uint8_t *data, size_t data_len, crc_update_func = crc32_zlib_sb8; break; case CRC32C_POLYNOMIAL: - crc_update_func = crc32c_sb8; + crc_update_func = CRC32C_FUNC; break; default: return -EINVAL; @@ -100,7 +110,7 @@ int bulk_verify_crc(const uint8_t *data, size_t data_len, do_pipelined = 1; #endif } else { - crc_update_func = crc32c_sb8; + crc_update_func = CRC32C_FUNC; } break; default: @@ -256,6 +266,134 @@ static uint32_t crc32_zlib_sb8( return crc; } +#ifdef __ARM_NEON__ + +/* + * Functions to reduce the size of the input buffer (fold) on ARM + * NEON. The smaller buffer has the same CRC32c checksum as the + * original. + * + * Most of the NEON buffer folding work takes place in the function + * below. We do the following: + * 1) 4 sets of vmull.p8's + * 2) Combine these to give a "vmull.p32" (lf3) + * 3) Shift left 1 bit to account for the endianess of multiplication. + * + * The folding and multiplication logic can be found documented at: + * https://wiki.linaro.org/LEG/Engineering/CRC + */ +static inline uint64x1_t crc32c_neon_proc_part(poly8x8_t lhs, poly8x8_t rhs1, + poly8x8_t rhs2, poly8x8_t rhs3, poly8x8_t rhs4) +{ + poly16x8_t lm1, lm2, lm3, lm4; + poly16x4x2_t lz1, lz2; + uint16x4_t le1, le2; + uint32x2_t le3; + uint32x4_t ls1, ls2, lf1, lf2; + uint64x2_t ls3, le4; + uint64x1_t lf3, lf4; + + lm1 = vmull_p8(lhs, rhs1); + lm2 = vmull_p8(lhs, rhs2); + lz1 = vuzp_p16(vget_low_p16(lm2), vget_high_p16(lm2)); + le1 = veor_u16(vreinterpret_u16_p16(lz1.val[0]), + vreinterpret_u16_p16(lz1.val[1])); + ls1 = vshll_n_u16(le1, 8); + lf1 = veorq_u32(ls1, vreinterpretq_u32_p16(lm1)); + + lm3 = vmull_p8(lhs, rhs3); + lm4 = vmull_p8(lhs, rhs4); + lz2 = vuzp_p16(vget_low_p16(lm4), vget_high_p16(lm4)); + le2 = veor_u16(vreinterpret_u16_p16(lz2.val[0]), + vreinterpret_u16_p16(lz2.val[1])); + ls2 = vshll_n_u16(le2, 8); + lf2 = veorq_u32(ls2, vreinterpretq_u32_p16(lm3)); + + le3 = veor_u32(vget_low_u32(lf2), vget_high_u32(lf2)); + ls3 = vshll_n_u32(le3, 16); + le4 = veorq_u64(ls3, vreinterpretq_u64_u32(lf1)); + lf3 = vreinterpret_u64_u32(veor_u32(vget_low_u32(vreinterpretq_u32_u64(le4)), + vget_high_u32(vreinterpretq_u32_u64(le4)))); + lf4 = vshl_n_u64(lf3, 1); + return lf4; +} + +static uint32_t crc32c_neon(uint32_t crc, const uint8_t *buf, size_t length) { + poly8x8_t xor_constant, lhs1, lhs2, lhs3, lhs4, rhs1, rhs2, rhs3, rhs4; + poly8x16_t lhl1, lhl2; + + uint64_t residues[4]; + uint32_t loop; + + if (length % 32) + return crc32c_sb8(crc, buf, length); + + /* + * because crc32c has an initial crc value of 0xffffffff, we need to + * pre-fold the buffer before folding begins proper. + * The following constant is computed by: + * 1) finding a 8x32 bit value that gives a 0xffffffff crc (with initial value 0) + * (this will be 7x32 bit 0s and 1x32 bit constant) + * 2) run a buffer fold (with 0 xor_constant) on this 8x32 bit value to get the + * xor_constant. + */ + xor_constant = vcreate_p8(0x3E43E474A2870290); + + if (crc != 0xffffffff) + return crc32c_sb8(crc, buf, length); + + /* k1 = x^288 mod P(x) - bit reversed */ + /* k2 = x^256 mod P(x) - bit reversed */ + + rhs1 = vcreate_p8(0x510AC59A9C25531D); /* k2:k1 */ + rhs2 = vcreate_p8(0x0A519AC5259C1D53); /* byte swap */ + rhs3 = vcreate_p8(0xC59A510A531D9C25); /* half word swap */ + rhs4 = vcreate_p8(0x9AC50A511D53259C); /* byte swap of half word swap */ + + lhl1 = vld1q_p8((const poly8_t *) buf); + lhl2 = vld1q_p8((const poly8_t *) buf + 16); + + lhs1 = vget_low_p8(lhl1); + lhs2 = vget_high_p8(lhl1); + lhs3 = vget_low_p8(lhl2); + lhs4 = vget_high_p8(lhl2); + + /* pre-fold lhs4 */ + lhs4 = vreinterpret_p8_u16(veor_u16(vreinterpret_u16_p8(lhs4), + vreinterpret_u16_p8(xor_constant))); + + for(loop = 0; loop < (length - 32)/32; ++loop) { + uint64x1_t l1f4, l2f4, l3f4, l4f4; + + l1f4 = crc32c_neon_proc_part(lhs1, rhs1, rhs2, rhs3, rhs4); + l2f4 = crc32c_neon_proc_part(lhs2, rhs1, rhs2, rhs3, rhs4); + l3f4 = crc32c_neon_proc_part(lhs3, rhs1, rhs2, rhs3, rhs4); + l4f4 = crc32c_neon_proc_part(lhs4, rhs1, rhs2, rhs3, rhs4); + + lhl1 = vld1q_p8((const poly8_t *) (buf + 32 * (loop + 1))); + lhl2 = vld1q_p8((const poly8_t *) (buf + 32 * (loop + 1) + 16)); + + __builtin_prefetch(buf + 32 * (loop + 2)); + + lhs1 = vget_low_p8(lhl1); + lhs2 = vget_high_p8(lhl1); + lhs3 = vget_low_p8(lhl2); + lhs4 = vget_high_p8(lhl2); + + lhs1 = vreinterpret_p8_u64(veor_u64(vreinterpret_u64_p8(lhs1), l1f4)); + lhs2 = vreinterpret_p8_u64(veor_u64(vreinterpret_u64_p8(lhs2), l2f4)); + lhs3 = vreinterpret_p8_u64(veor_u64(vreinterpret_u64_p8(lhs3), l3f4)); + lhs4 = vreinterpret_p8_u64(veor_u64(vreinterpret_u64_p8(lhs4), l4f4)); + } + + vst1q_p8((poly8_t *) &residues[0], vcombine_p8(lhs1, lhs2)); + vst1q_p8((poly8_t *) &residues[2], vcombine_p8(lhs3, lhs4)); + + return crc32c_sb8(0, (const uint8_t *)residues, 32); +} + +#endif /*__ARM_NEON__ */ + /////////////////////////////////////////////////////////////////////////// // Begin code for SSE4.2 specific hardware support of CRC32C /////////////////////////////////////////////////////////////////////////// -- 1.7.9.5

12 years, 4 months

1
0
0 0

[ACTIVITY] 1 - 5 April 2013

by Omair Javaid

== Progress == * Investigated gdb test cases that are failing on arm-remote gdbserver configuration. -- Fixed some failures by updating host cross compiler version -- Fixed some failures by fixing environment issue where not being loaded properly. -- All test cases that need to build a shared library and transfer it to remote target FAIL due to problems which seems like dejaganu limitations. * Ran GDB test suite on x86_64 remote gdbserver configuration and compared performance of same configuration on arm. * Got most documentation ready for Ireland Visa application, still waiting on invitation letter and hotel booking details. *** Still No blue-print available to log work in JIRA. == Plan == * Investigate compiler version specific and general failures on arm remote gdbserver configuration. * Start on investigation/fixing of arm specific failures in gdb test suite results. * Submit Ireland visa application after receiving invitation letter and hotel booking details. * Planned Holiday -- Planned Day off on Friday 12th April 2013 for car checkup in workshop.

12 years, 4 months

1
0
0 0

[ACTIVITY] 2 - 5 Apr 2013

by Kugan

== Summary == - benchmarking coremark with VRP based extension elimination * extension elimination in some cases affecting other optimizations * With this improvements are marginal (details below) == Plan == - study crc where extension elimination is resulting in bad code - Find a solution ==Details== If an assignment gimple statement has RHS expression value that can fit in LHS type, truncation is redundant. Zero/sign extensions are redundant in this case and rtl statement can be replaced as from: (insn 12 11 0 (set (reg:SI 110 [ D.4128 ]) (zero_extend:SI (subreg:HI (reg:SI 117) 0))) c5.c:8 -1 (nil)) to: (insn 12 11 0 (set (subreg/s/u:HI (reg:SI 110 [ D.4128 ]) 0) (subreg:HI (reg:SI 117) 0)) c5.c:8 -1 (nil)) With this change, for the following case: short unPack( unsigned char c ) { /* Only want lower four bit nibble */ c = c & (unsigned char)0x0F ; if( c > 7 ) { /* Negative nibble */ return( ( short )( c - 16 ) ) ; } else { /* positive nibble */ return( ( short )c ) ; } } asm without elimination unPack: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 0, uses_anonymous_args = 0 @ link register save eliminated. and r0, r0, #15 cmp r0, #7 subhi r0, r0, #16 uxthhi r0, r0 sxth r0, r0 bx lr .size asm with elimination unPack: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 0, uses_anonymous_args = 0 @ link register save eliminated. and r0, r0, #15 cmp r0, #7 subhi r0, r0, #16 sxth r0, r0 bx lr In some cases, changed rtl statement is not eliminated by later passes and is generated as a mov instruction. Worse, it also seems to affect the other optimization passes and resulting in worse code for crc. Not found the cause for it yet.

12 years, 4 months

1
0
0 0

[ACTIVITY] 1 - 5 Apr 2013

by Venkataramanan Kumar

== Progress == * gc sections tests Completed adding gc-section test cases. 1. TLS and GOT tests. http://sourceware.org/ml/binutils/2013-03/msg00273.html 2. PLT tests. http://sourceware.org/ml/binutils/2013-03/msg00273.html * Evaluate gprof work. There is one function hook "find_call" which is machine dependent and is written for i386.c/sparc Then there are changes in configure.in to add architecture details. * 1-1 with Matt. == Plan == Continue gprof support work for Aarch64

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 14

by Renato Golin

== Progress == * Buildbots - All ARM build-bots GREEN! Hurray!!! :D - Improving sort comparison functions makes output reproducible on all machines - Fixed fpcmp, which fixes sqlite3 report - A bad commit broke lots of tests, reverted - Adding a self-hosting check-all Pandaboard - In theory, it works, but config is not perfect yet * Arndale - Suse image is not stable enough, installed Linaro (325) - Fathi got GCC bootstrapping with it, should work - Installed a heat-sink on the board, should reduce problems - Still got network issues, may be the mac address - Someone could liaise with Dave Pigott to get a new MAC on the DHCP * EuroLLVM 2013 - Badges, finishing touches == Plan == * Holidays next week, then * Check with Galina about Beagle bots * Finish Panda self-host + test-suite A9 bot * Gather info and hardware for 3.3 release tests * Plan for the future!

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 14

by Will Newton

== Progress == * Short week (2 days) * Tested memcpy on big endian. * Updated newlib memcpy patch. * More digging into glibc IFUNC. == Issues == * None. == Plan == * Try and get newlib mempcy patch accepted. * IFUNC... -- Will Newton Toolchain Working Group, Linaro

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 14

by Yvan Roux

== Issues == * None == Progress == * Boehm-gc AArch64 support backport in GCC: - Ping maintainers, no response yet. * Libunwind AArch64 support: - No significant improvements, task preempted by review roster. * Merge request review roster: - Lots of reviews done and ongoing to prepare 4.6, 4.7 en 4.8 releases. == Plan == * Libunwind AArch64 support: - Fix and submit upstream.

12 years, 4 months

1
0
0 0

[ACTIVITY] 2-5 April 2013

by Christophe Lyon

== Progress == * Disable-peeling: - Still waiting for the results from cbuild. Because of many merges (pre-release week), there are a lot of jobs in the queue :-( * Libsanitizer: - tried to understand why isatty(2) returns true when executing the testsuite via qemu. * Neon intrinsics codegen: - benchmarking in bare-machine shows that GCC is actually ~5% faster than RVCT on this sample codec. - to be further discussed internally * Neon intrinsics testsuite: - looking at FP16 support. * Turnoff 64bits ops in Neon: - backport in 4.8 done by Matt during the release merges. * Arndale: a few attempts to use it, but it's still unstable. * Internal support == Next == * Disable-peeling: Analyze bench results when available. * Revert-coalesce-vars: Analyze bench results when available. * Libsanitizer: contine isatty(2) study wrt qemu/expect. * Neon intrinsics: check internally for other codecs

12 years, 4 months

1
0
0 0

[ACTIVITY] report week 14

by Peter Maydell

[short week, two days] Progress: * qemu maintenance ** arm-devs pull request (and associated code review, etc) * VIRT-4 [Guest migration support for KVM] ** VIRT-49: implement cp15 sync with kernel *** some forward motion, but partway through realised some work I thought had been committed last year hadn't been, so: ** VIRT-73 *** new work item, covering updating the migration state for the CPU itself to use VMState structures, by updating, testing and tweaking some patches from Juan Quintela from last year *** have done the 'update' part; tests and tweaks still todo -- PMM

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 14

by Zhenqiang Chen

Summary: * Investigate conditional compare. Details: 1. Expand conditional compare as TRUTH_AND_EXPR/TRUTH_IOR_EXPR for tests. 2. Test tree-level changes for conditional compare. * Fix/workaround most ICE issues in regression tests. * Still some fails which expected VRP can optimize the cases. 3. Try to build Coremark and find that conditional compare does block optimizations, which leads to worse performance. Plan: * Investigate VRP and other optimizations to handle conditional compare. * Raise the propose for upstream discussion. Planned leaves: * April 4-8: Chinese Ching Ming Festival and annual leaves. * April 12: Internal team event. * April 16-17: Internal training. Best Regards! -Zhenqiang

12 years, 4 months

1
0
0 0

[ACTIVITY] 25 - 29 March 2013

by Omair Javaid

== Progress == Started investigating gdb test cases that are failing on arm-remote gdbserver configuration. Completed investigation on all timeout gdb test cases failures in arm-remote gdbserver configuration. Setup a ubuntu test machine for gdb testing on x86_64 in remote gdbserver configuration. Initiated visa process for Ireland and sent requests for required documents to Arwen. *** No blue-print available to log work in JIRA. == Plan == Complete investigation of all failure gdb test cases on arm-remote gdbserver configuration. Run gdb test suite in x86_64 remote gdbserver configuration and compare with all other configurations already tested including arm remote to figure out any similar failures while running test suite remotely on two different machines. Book travel to Ireland and complete visa process.

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 13

by Zhenqiang Chen

Summary: * Investigate how to expand conditional compare. Details: 1. Try to expand conditional compare to RTL * It seams hard to expand conditional compare to just one cond_exec insn during expand, since it has to know the cc (GT, LT, etc) set from previous instruction and tell the later instruction which cc (GT, LT, etc) it set. * Try to add new RTL key-word and insn pattern. 2. Follow up Linaro toolchain binaries bug in Yocto build: 1159392, 1161348 and 1161351. Plan: * Generate asm for conditional compare. Planned leaves: * April 4-8: Chinese Ching Ming Festival and annual leaves. * April 12: Internal team event. * April 16-17: Internal training. Best Regards! -Zhenqiang

12 years, 4 months

2
1
0 0

[ACTIVITY] 25-29 March 2013

by Venkataramanan Kumar

== Progress == - Very short work week. I was on leave last Wednesday and Thursday (27th and 28th). - Posted patch for gc-section tests for TLS and got related relocs. - Discussing with Marcus on patch I wrote for gc section tests on PLT related relocs. == Plan == - Post patch for gc section tests for PLT relocs. - Complete gc section tests for other generic cases. - Understand and evaluate gprof support work for Aarch64

12 years, 4 months

1
0
0 0

[ACTIVITY] 25-28 March 2013

by Kugan

== Progress == working on http://cards.linaro.org/browse/TCWG-14 - All but 2 test cases are passing and extension elimination for the simple cases are eliminated - one of the test failure was due to bug with value range propagation pass. Have to investigate this further. - In one instance even though extensions are removed, 1 more instruction is generated (for crc) - Need to investigate it - Got the chromebook and Set up Ubuntu; boot strapping gcc now == Plan == - Start with the benchmarking - investigate the performance and VRP issue - Also start with http://cards.linaro.org/browse/TCWG-13 in parallel

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 13

by Yvan Roux

== Issues == * None == Progress == * Libunwind AArch64 support: - Most of the testsuite is now fine - but some fixes still needed before upstream submission. == Plan == * Libunwind AArch64 support: - Fix and submit upstream.

12 years, 4 months

1
0
0 0

[ACTIVITY] 25-29 March 2013

by Christophe Lyon

== Progress == * Disable-peeling: - benchmarked locally on snowball. Observed a few regressions in spec2k. To be analyzed and confirmed with the results from cbuild. - patched cbuild to work-around a bzr bug which prevented these jobs from being spawned. * Libsanitizer: sent patch upstream. Discussion about interactions with qemu. * Revert-coalesce: spawned thought-to-be reference jobs for benchmarking. * Neon intrinsics codegen: - First analysis of sample codecs seems to indicate that gcc generates sequences of interdependent instructions where rvct manages to insert some code in between. - To be confirmed by dedicated benchmarking, probably in bare-machine mode. * Neon intrinsics testsuite: - Added support for polynomial variants (*_p8, *_p16) - Identified wrong code generated by gcc-linaro-4.7; did not check with trunk. - Transforming into a dejagnu forms will probably be a lot of work :-( * Internal activities == Next == * Disable-peeling: - analyze bench results from cbuild when available - compare with the results from my snowball * Libsanitizer: - resume investigation about isatty problem when ran under qemu. * Turnoff 64bits ops In Neon: - backport in linaro-4.8 once the process has been clarified. * Revert-coalesce: - check bench results * Neon intrinsics codegen: - perform dedicated benchmarking

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 13

by Will Newton

== Progress == * Booked flight for LCE. * Benchmarked and ran tests on new memcpy implementation. * Attempted but failed to get new memcpy tested on big endian (still todo). * Committed new memcpy implementation to cortex strings. * Passed new memcpy to Android team for bionic. * Submitted newlib patch for new memcpy. * Committed binutils ld-elfvsb testsuite fixes, native testsuite now green! * Further investigation of IFUNC in glibc. == Issues == * Pandaboard ES still a bit flakey, Chromebook hopefully on its way to replace it. == Plan == * Iron out issues with native binutils make check in cbuild/LAVA. * Get newlib memcpy patch committed. * Investigate testing memcpy on big endian (qemu user, models?). * IFUNC... -- Will Newton Toolchain Working Group, Linaro

12 years, 4 months

1
0
0 0

[ACTIVITY] report week 13

by Peter Maydell

Progress: * qemu maintenance ** https://ci.linaro.org/jenkins/job/qemu-ltp/ now shows graphs of LTP test results for linux-user mode ** rebased qemu-linaro and got it working again (omap3 display code needed rework after upstream changes) ** investigated why Christoffer Dall's kernels weren't booting: turns out to be that vexpress now requires CONFIG_REGULATOR but doesn't force it to be set or set it in the vexpress_defconfig ** rebased/resent/pinged various in-flight patches * VIRT-4 [Guest migration support for KVM] ** VIRT-49: implement cp15 sync with kernel *** located my work on this from last year, refreshed my memory on how far I'd got and what I was planning to do -- PMM

12 years, 4 months

1
0
0 0

[ACTIVITY] week 13

by Renato Golin

== Progress == * Re-installed the panda buildbot, using USB drive as bot dir * Reviewing lots of ARM patches (more than usual) * Trying Arndale again, some errors, some passes, cooler might be responsible - Got one internal error, one build error and one pass with Ubuntu kernel + patch - Trying Suse image: - It has a broken serial driver (makes things much harder) - sshd does not start by default (in conjunction with serial bug, it's a killer) - Now running on a precarious mode, hopefully enough for our needs * sqlite3 error due to VMUL.f64 while on x86_64 "long double" is f128 - sqlite3 is the best example on what NEVER to do with floating point values >:| - Sent patch, working around TILE-Gx issues == Issues == * Still a bit ill, productivity reduced * Not having a wired network on my desk wastes a LOT of my time == Plan == * Push the sqlite3 patch though * Continue fixing the 4 remaining broken tests * Continue with Arndale investigation with Christophe and Zhenqiang

12 years, 4 months

1
0
0 0

GCC bootstrap on Arndale

by Renato Golin

Hi folks, I'm trying again the bootstrap of GCC on Arndale and it goes pretty well until it has to install libgcc that it just compiled. When I build first time, I get an error while installing libgcc: make[4]: Entering directory `/home/linaro/devel/gcc/build/objs/armv7l-unknown-linux-gnueabihf/libgcc' /bin/bash /home/linaro/devel/gcc/src/libgcc/../mkinstalldirs ../.././gcc (...) /bin/bash /home/linaro/devel/gcc/src/libgcc/../mkinstalldirs ../.././gcc; /usr/bin/install -c -m 644 ./libgcc_s.so.1 ../.././gcc/libgcc_s.so.1; rm -f ../.././gcc/libgcc_s.so; /usr/bin/install -c -m 644 ./libgcc_s.so ../.././gcc/libgcc_s.so Live child 0x01dec548 (install-shared) PID 4405 Reaping losing child 0x01dec548 PID 4405 make[4]: *** [install-shared] Error 1 Though, if I run that command by hand, it works... I then re-ran make and the first point there is an error is on gmp: This program built for arm-unknown-linux-gnueabihf Reading makefiles... Reading makefile `Makefile'... Reaping losing child 0x01866320 PID 4784 make[3]: *** [config.h] Error 1 Removing child 0x01866320 PID 4784 from chain. make[3]: Leaving directory `/home/linaro/devel/gcc/build/objs/gmp' Need a job token; we have children Duplicate the job FD Live child 0x00ae17f8 (all-stage1-libiberty) PID 4755 Live child 0x00be3508 (all-stage1-gmp) PID 4736 Reaping losing child 0x00be3508 PID 4736 make[2]: *** [all-stage1-gmp] Error 2 Removing child 0x00be3508 PID 4736 from chain. Released token for child 0x00be3508 (all-stage1-gmp). make[2]: *** Waiting for unfinished jobs.... Live child 0x00ae17f8 (all-stage1-libiberty) PID 4755 I can't notice anything wrong on gmp (all objects are there), other than a number of symlinks to a missing directory: gmp-mparam.h -> /home/linaro/devel/gcc/src/gmp/mpn/generic/gmp-mparam.h the directory "generic" doesn't exist, and lots of files in "mpn" also point there. Could be a red herring, though. Any ideas? cheers, --renato PS: this doesn't look like an Arndale specific bug, so we might still be able to use them for GCC bootstrapping...

12 years, 4 months

3
3
0 0

[PATCH][for-danny] external-linaro-toolchain-versions: OE variables need to be properly expanded

by Denys Dmytriyenko

From: Denys Dmytriyenko <denys(a)ti.com> Otherwise eglibc version is set to UNKNOWN. Similar fix is already in master. Signed-off-by: Denys Dmytriyenko <denys(a)ti.com> --- conf/distro/include/external-linaro-toolchain-versions.inc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/conf/distro/include/external-linaro-toolchain-versions.inc b/conf/distro/include/external-linaro-toolchain-versions.inc index 6b5a6fb..8e2c68c 100644 --- a/conf/distro/include/external-linaro-toolchain-versions.inc +++ b/conf/distro/include/external-linaro-toolchain-versions.inc @@ -43,7 +43,7 @@ def elt_get_libc_version(d): if not syspath: return 'UNKNOWN' - libpath = syspath + '/libc/lib/${ELT_TARGET_SYS}/' + libpath = syspath + bb.data.expand('/libc/lib/${ELT_TARGET_SYS}/', d) if os.path.exists(libpath): for file in os.listdir(libpath): -- 1.8.1.5

12 years, 4 months

1
0
0 0

[ACTIVITY] Week 12

by Zhenqiang Chen

Summary: * Send out shrink-wrap related patches for review. * Investigate how to add a new tree code. Details: 1. Fix lp:1157050 and lp:1107659 for Linaro toolchain binaries. 2. Test shrink-wrap dwarf/unwind info and send out the patches for review. 3. Make progress on conditional compare support. With some hard-codes in gcc, it can gimplify a small case to conditional compare on tree and no assert until expand. Plan: * Investigate how to expand conditional compare GIMPLE to RTL and emit asm. Planned leaves: * March 31. * April 4-8. Best Regards! -Zhenqiang

12 years, 4 months

3
4
0 0

Testing binutils natively

by Will Newton

Hi all, I'd like to run the binutils testsuite in a native configuration regularly to find any regressions. Do we have any infrastructure for doing this? It looks like LAVA would be useful but it looks complex and I am not sure if we use that already for running toolchain tests (I think there was a Connect session about that?). Thanks, -- Will Newton Toolchain Working Group, Linaro

12 years, 4 months

3
2
0 0

[ACTIVITY] 18-22 March 2013

by Christophe Lyon

== Progress == * Disable-peeling: - benchmarking locally on snowball - failed to build reference branch on cbuild, for an unknown reason * Turnoff 64bits ops in Neon: - committed upstream in 4.9 (now stage 1) - benches of backport into Linaro-4.7 OK: no significant diff, except +12.6% on spec2k's crafty) - Filed merge request. * Vectorizer cost model: - benches of backport inot Linaro-4.7 OK (no significant diff, as expected). - Filed merge request. * Revert-coalesce: - benches ran in cbuild, but no *-diff.txt file generated. * Libsanitizer: - testsuite results OK. All unsupported tests are normal. * Neon intrinsics codegen: - got internal feedback * GDB reverse debug: - filed 2 bug reports after internal requests. * Misc: - filed several bug reports against cbuild to track the problems I observed. == Next == * Disable-peeling: - analyze bench results - understand/'fix what's wrong with cbuild * Turnoff 64bits ops in Neon: - backport to Linaro-4.8 * Revert-coalesce: - manually compute bench differences if unable to have cbuild do it. * Libsanitizer: - propose patch upstream.

12 years, 4 months

1
0
0 0

[ACTIVITY] 18 - 22 March 2013

by Omair Javaid

== Progress == Knocked out more GDB remote configuration failures that were failing due to timeouts. Had 1:1 with Matt for direction on GDB improvement plan. Looked around for Ireland visa process and filled out visa application. == Plan == Complete review of remote timeout based test case failures. Start work on the GDB improvement blueprint in JIRA from this week. Get remaining documentation for Ireland visa and complete application.

12 years, 4 months

1
0
0 0

[ACTIVITY] 18-22 March 2013

by Venkataramanan Kumar

== Progress == - Looking at TLS relocs and coming up with test cases for garbage collecting them. - Patch for missedout testcases in gc section is up streamed. Thanks to Marcus. == Plan == - Complete gc section test cases for TLS relocs. - Understand and evaluate gprof support work for Aarch64 Misc ----- Leave on Wednesday and Thursday (27th and 28th)

12 years, 4 months

1
0
0 0

[ACTIVITY] 18-22 March 2013

by Kugan

== Progress == - Worked on VRP based zero/sign extension elimination at tree level - Some regression test cases are failing; investigating them == Plan == - Analyse the reason for test case failure and fix them - Extend the code to handle all the possible cases (currently implemented for subset to get the framework working)

12 years, 4 months

1
0
0 0

Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks

by Mans Rullgard

This post is making the rounds today: http://blog.regehr.org/archives/918 -- Mans Rullgard / mru

12 years, 4 months

4
6
0 0

[ACTIVITY] Week 12

by Yvan Roux

== Issues == * None == Progress == * Libunwind AArch64 support: - basic implementation for building lib and testsuite done - but even a simple test case doesn't work for the moment == Plan == * Libunwind AArch64 support: - continue AArch64 specific implementation and informtation gathering

12 years, 5 months

1
0
0 0

[ACTIVITY] Week 12

by Renato Golin

== Progress == * EuroLLVM paper review * Disabled EH tests on ARM for now * Fixed TSVC: NEON vs. VFP VMUL.f32 (and IEEE 754 correctness) * Changed FeatureNEONForFP to false on EABI ARM targets unless unsafe-math * Trying Arndale again, with u-boot patched, not good * Broken Panda buildbots, trying to fix == Issues == Got ill on Tuesday and only worked partially, if at all, the rest of the week Hopefully will be better next week... == Plan == * Fix our panda buildbot, maybe add more * Final try on Arndale GCC bootstrap before giving up * Continue fixing test-suite failures (only 5 left)

12 years, 5 months

1
0
0 0

[ACTIVITY] report week 12

by Peter Maydell

Progress: * VIRT-4 [Guest migration support for KVM] ** VIRT-51: vexpress migration: ** wrote and submitted patches for all the devices that need fixes ** tracked down a painful bug where the guest just hung on vmload to a missing state-save for a timer device, submitted patch ** remaining work for this item is just responding to patch review -- PMM

12 years, 5 months

1
0
0 0

LLVM ARM NEON VMUL.f32

by Renato Golin

Hi folks, I found an issue while fixing a test using the wrong VMUL.f32, and I'd like to know what should be our choice on this topic that is slightly controversial. Basically, LLVM chooses to lower single-precision FMUL to NEON's VMUL.f32 instead of VFP's version because, on some cores (A8, A5 and Apple's Swift), the VFP variant is really slow. This is all cool and dandy, but NEON is not IEEE 754 compliant, so the result is slightly different. So slightly that only one test, that was really pushing the boundaries (ie. going below FLT_MIN) did catch it. There are two ways we can go here: 1. Strict IEEE compatibility and *only* lower NEON's VMUL if unsafe-math is on. This will make generic single-prec. code slower but you can always turn unsafe-math on if you want more speed. 2. Continue using NEON for f32 by default and put a note somewhere that people should turn this option (FeatureNEONForFP) off on A5/A8 if they *really* care about maximum IEEE compliance. Apple already said that for Darwin, 2 is still the option of choice. Do we agree and ignore this issue? Or for GNU/EABI we want strict conformance by default? GCC uses fmuls... cheers, --renato

12 years, 5 months

5
6
0 0

ARMV8 gcc toolchain issue while compiling for a foundation model

by pavan p m

Hello, I am having an issue with using the gcc toolchain for armv8. I am trying to cross compile a simple program (helloworld.c) as suggested in the link : https://wiki.linaro.org/HowTo/HelloAarch64. But when I try executing the binary on the simulated armv8 (using foundation model), I am getting error in GLIBC, specifically "/lib/libc.so.6: version `GLIBC_2.16' not found" . Could you please help me as to what could be wrong here? Thanks, Pavan

12 years, 5 months

2
2
0 0

[ACTIVITY] 11-15 March 2013

by Will Newton

== Progress == * Analyzed Android kernel linker issue and created LP #1154165 to track it. * Triaged remaining binutils Launchpad tickets. * Setup my Pandaboard with Linaro 13.01 (13.02 oopses on boot) to run tests. * binutils: Committed fix for LP #517081 (Floating-point assembly and disassembly bugs on armel) upstream. * binutils: Committed a fix for ARM EABI tests upstream. * Lots of admin stuff. == Plan == * Get binutils testsuite green in a native configuration (fix LP #812276). * Investigate getting binutils testuite automated via cbuild/Lava. * More bugs... -- Will Newton Toolchain Working Group, Linaro

12 years, 5 months

1
0
0 0

[ACTIVITY] 11 - 15 March 2013

by Omair Javaid

== Progress == Reviewing GDB tests that FAIL due to timeout problems in remote configuration. Made some changes to some of the GDB tests that FAIL on arm targets to check if they work by minor modifications. Sick Days: Had been sick due to cough n fever and a drop in blood pressure made me take most part of Thursday and Friday off. == Plan == Get with Matt for Post- Connect work targets. Review remaining GDB tests that FAIL due to timeout problems in remote configuration. Further experiments with GDB test suite to check support for unsupported tests on arm.

12 years, 5 months

1
0
0 0

Linaro Toolchain Binaries 2013.03 released

by Bernhard Rosenkränzer

The Linaro Toolchain and Platform Working Groups are pleased to announce the 2013.03 release of the Linaro Toolchain Binaries, a pre-built version of Linaro GCC and Linaro GDB that runs on generic Linux or Windows and targets the glibc Linaro Evaluation Build. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 4.7 2013.03 * Linaro GDB 7.5 2012.12 * A statically linked gdbserver * A system root * Manuals under share/doc/ The system root contains the basic header files and libraries to link your programs against. Interesting changes include: * gcc updated to 4.7-2013.03: * Updates to GCC 4.7.2+svn196272 * Includes arm/aarch64-4.7-branch up to svn revision 196225 * A fix for LP #1135633: [linaro regression] alsa-tools FTBFS with error "unable to find a register to spill in class ‘AREG’" The Linux version is supported on Ubuntu 10.04.3 and 12.04, Debian 6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation 5.7 and later, and should run on any Linux Standard Base 3.0 compatible distribution. Please see the README about running on x86_64 hosts. The Windows version is supported on Windows XP Pro SP3, Windows Vista Business SP2, and Windows 7 Pro SP1. The binaries and build scripts are available from: https://launchpad.net/linaro-toolchain-binaries/trunk/2013.03 Need help? Ask a question on https://ask.linaro.org/ Already on Launchpad? Submit a bug at https://bugs.launchpad.net/linaro-toolchain-binaries On IRC? See us on #linaro on Freenode. Other ways that you can contact us or get involved are listed at https://wiki.linaro.org/GettingInvolved.

12 years, 5 months

1
0
0 0

[ACTIVITY] 13-15 March 2013

by Yvan Roux

Short week to ... == Progress == * Configured GCC testsuite to run on the Foundation model. * Boehm GC AArch64 support: - Submitted gc integration patch in GCC upstream for review. - libatomic_ops AArch64 support branch re-tested and merged in mainline. == Next == * AArch64 libunwind support.

12 years, 5 months

1
0
0 0

[ACTIVITY] 11-15 March 2013

by Venkataramanan Kumar

== Progress == - Closed the blue print for gc-sections implementation since the patch got upstreamed. - Opened new blue print for adding more test coverage to gc-sections tests. - Submitted a patch to enable missed out gc-sections test cases from ld-elf group. - Wrote gc-sections test cases for few GOT related relocs. == Plan == - Understand equivalences created during CFG traversal for jump threading. - Look at GCC code for a simple test case where jump threading is missed out. - Continue writing gc-sections test cases for remaining relocs.

12 years, 5 months

1
0
0 0

[ACTIVITY] 12-15 March 2013

by Kugan

== Progress == - Monday was a public holiday - Studied benchmarks and analysed the rtl/asm for redundant sign extensions - Came up with simple test cases based on this (have 6 test cases now) - Looked at gcc tree documentations and helper macros; tried it by adding more debug dumps for types at tree level == Plan == - Start with the algorithm for sign extension elimination - Skipping manual changes at source level/asm level to see the performance improvement for now.

12 years, 5 months

1
0
0 0

[ACTIVITY] 13-15 March 2013

by Christophe Lyon

Short week... == Progress == * Catch up on internal tasks / email that piled up during holidays + Connect * Resumed work on disable-peeling: - local benchmarking on snowball - restarting benchmarks via cbuild for an additional check == Next == * Check benchmark results on disable-peeling * Have a look at how to dejagnu-ize my Neon intrinsic tests * Check results of libsanitizer branch * Check results of 'revert-coalesce' branch * Check bench results of '4.7-backport-vect-cost-model' * Check bench results of '4.7-turnoff-64bits-ops' * Investigate why cbuild did not generate all the comparisons I expected (*-diff.txt files) * Check whether 2013.03 release process exposed the same problems I observed with 2013.02.

12 years, 5 months

1
0
0 0

[ACTIVITY] report week 11

by Peter Maydell

Progress (in a 1 day week...): * qemu maintenance: ** released qemu-linaro 2013.03 ** arm-devs pullreq * VIRT-4 [Guest migration support for KVM] ** audited vexpress code for migration issues: there are a few devices needing minor cleanup, and one (pflash_cfi01) which has no migration support at all and needs it writing * KVM other: ** reviewed virtio-blk refactoring patchset -- PMM

12 years, 5 months

1
0
0 0

[ACTIVITY] Week 11

by Renato Golin

== Progress == * Recuperating from Connect, catching up on email * Attended David's and Maddog's presentation on Monday * Investigating Arndale bug (seems to work with new kernel) - Bootstrapping LLVM works, GCC doesn't * Reviewing patches upstream (Mans', Tim's, others) * Fixed three bugs on test-suite that depended on RNGs - Only two more tests broken only in ARM - Five others broken on both (but only visible on our bot) - Nine EH tests that need disabling, for now == Plan == * Tackle the two last ARM specific bugs * If time allows, clear the other 5 * Try to disable any EH-specific test on ARM * Start talks about getting an internal binary distribution process going

12 years, 5 months

1
0
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

linaro-toolchain