linaro-toolchain December 2015

linaro-toolchain@lists.linaro.org

18 participants
32 discussions

[ACTIVITY] 7 Nov - 11 Nov 2015

by Prathamesh Kulkarni

== This Week == * TCWG-72 (2/10) - Another iteration. * LTO (4/10) - Building spec with different combinations of -flto -flto-partition -flto-compression-level - Builds cleanly on AArch64, ICE's on ARM for 447.dealII with -flto - Looked at segfault with 483.xalanpack * TCWG-319 benchmarking (1/10) - fp benchmark results on: r1-a12: -0.04 % cortex-a53: -0.09 % cortex-a57: -0.14% - int benchmarks completed running for reference revision on cortex-a15 - int benchmarks with-patch runnning on cortex-a15 * TCWG-310 benchmarking (1/10) - r1-a12: 0.11% - Benchmark jobs failed on a53, a57. * Misc (2/10) - Submitted patch to fix building 450.soplex - Looked at how to write ipa pass, ipa-pure-const and ipa-cp. - Meetings == Next Week == - tcwg-319, tcwg-310 benchmarking - tcwg-72 - LTO

8 years, 4 months

[Weekly] 07-11 December 2015

by Michael Collison

== This week == * Bugzilla 68543 - [AArch64] Implement overflow arithmetic standard names (7/10) - Implemented signed and unsigned add, subtract, and multiply overflow standard patterns - Investigated testing of overflow patterns * Misc (3/10) - Conference calls - Misc ARM Housekeeping - Lost connectivity due to old ARM Unix VPN Client == Next week == * TCWG-317 - Exploit wide add operations when appropriate for Aarch32 - Minor code update to address upstream comment * Vacation until rest of year

8 years, 4 months

[ACTIVITY] 7-11 December 2015

by Christophe Lyon

== Progress == * GCC (4/10) - pr68620 (fp16 transfers in big-endian mode) - checking regressions observed on trunk - had to revert my cleanup patch for target attributes tests, not sure how to handle all possible combinations of options/defaults * Validation (1/10) - small improvements in reporting * Misc (conf calls, meetings, emails, ...) (3/10) * Internal training (2/10) == Next == * Validation * GCC: bug fixes/cleanup

8 years, 4 months

[ACTIVITY] Dec 7 - 11, 2015

by Yao Qi

* One day off on Wed. [2/10] # Progress # * Enable gdb core file tests when testing remotely, TCWG-171. I've almost had the conclusion that corefile remote testing can't be done due to limitations in dejagnu and nfs mount testing infrastructure. Need to write them down. [2/10] * Mutli-arch follow-up work, teach AArch64 GDBserver understand ARM breakpoint instructions. TCWG-460. Done. [3/10] * Review ARM GDBserver software single step patch V7. Almost OK, except some small things. [2/10] * Misc, meeting, email, [1/10] # Plan # * TCWG-424, Draft a fix for the fail in random-signal.exp. * TCWG-156, GDB test parity between AArch64 and X86_64. * One day off on Wed. or Fri. Planned absence: * Dec 24-Jan 3. -- Yao

8 years, 4 months

[ACTIVITY]

by Renato Golin

== Progress == * Holiday (2/10) * Release (1/20) - 3.7.1 Final, all green * Maintenance (5/10) - Fixing PR25720 - Bug cleaning: PR18921, PR13259, PR13138, PR12926, PR17963, PR18187, PR22692 - Checked strided vectorizer on ToT, EEMBC 2x geomean! * Background (2/10) - Code review, meetings, discussions, general support, etc. - Power cut, restarting bots, testing TK1, plans, etc. == Holidays == I'll be back on the 5th Jan.

8 years, 4 months

[ACTIVITY] Nov 30 - Dec 4, 2015

by Kugan

== Progress == - PR66726 (2/10) * Testing a patch - PR63586 (2/10) * Posted a patch * Revised the patch based on testing - LuaJIT (2/10) * Setup nginx * Still haven't figured out how to use mongodb with nginx (config required). - Misc (2/10) * gcc/bug list * LTO - sick (2/10) == Plan == * bug reports * LTO

8 years, 4 months

incomplete .arch specifiers with latest Linaro gcc5 patches on armv8?

by Robert Schiele

Hi, when working with the Linaro patches I found that a particular commit breaks our aarch64 kernel build. The patch in question is that one: commit be09330da9d0777c4a58568d137e3f8a3dbe0a0b Author: Yvan Roux <yvan.roux(a)linaro.org> Date: Tue Oct 27 21:18:19 2015 +0100 One of the things it attempts to change apparently is moving the .arch specifiers in the assembler file from a global scope to individual functions. What also happens though is that they seem to lose some information after that transformation. I observed that when building arch/arm64/crypto/aes-ce-cipher.c from the Linux kernel. This code contains inline assembly like this: static void aes_cipher_decrypt(struct crypto_tfm *tfm, u8 dst[], u8 const src[]) { struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); struct aes_block *out = (struct aes_block *)dst; struct aes_block const *in = (struct aes_block *)src; void *dummy0; int dummy1; kernel_neon_begin_partial(4); __asm__(" ld1 {v0.16b}, %[in] ;" " ld1 {v1.2d}, [%[key]], #16 ;" " cmp %w[rounds], #10 ;" " bmi 0f ;" " bne 3f ;" " mov v3.16b, v1.16b ;" " b 2f ;" "0: mov v2.16b, v1.16b ;" " ld1 {v3.2d}, [%[key]], #16 ;" "1: aesd v0.16b, v2.16b ;" " aesimc v0.16b, v0.16b ;" "2: ld1 {v1.2d}, [%[key]], #16 ;" " aesd v0.16b, v3.16b ;" " aesimc v0.16b, v0.16b ;" "3: ld1 {v2.2d}, [%[key]], #16 ;" " subs %w[rounds], %w[rounds], #3 ;" " aesd v0.16b, v1.16b ;" " aesimc v0.16b, v0.16b ;" " ld1 {v3.2d}, [%[key]], #16 ;" " bpl 1b ;" " aesd v0.16b, v2.16b ;" " eor v0.16b, v0.16b, v3.16b ;" " st1 {v0.16b}, %[out] ;" : [out] "=Q"(*out), [key] "=r"(dummy0), [rounds] "=r"(dummy1) : [in] "Q"(*in), "1"(ctx->key_dec), "2"(num_rounds(ctx) - 2) : "cc"); kernel_neon_end(); } Now without this patch the compiler behaved like the following. It was invoked with: aarch64-linux-gnu-gcc -Wp,-MD,arch/arm64/crypto/.aes-ce-cipher.o.d -nostdinc -isystem /var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/bin/../lib/gcc/aarch64-linux-gnu/5.2.1/include -I/var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/src/linux/arch/arm64/include -Iarch/arm64/include/generated/uapi -Iarch/arm64/include/generated -I/var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/src/linux/include -Iinclude -I/var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/src/linux/arch/arm64/include/uapi -Iarch/arm64/include/generated/uapi -I/var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/src/linux/include/uapi -Iinclude/generated/uapi -include /var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/src/linux/include/linux/kconfig.h -I/var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/src/linux/arch/arm64/crypto -Iarch/arm64/crypto -D__KERNEL__ -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -mgeneral-regs-only -fno-delete-null-pointer-checks -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fno-stack-protector -Wno-unused-but-set-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -fno-var-tracking-assignments -g -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -DCC_HAVE_ASM_GOTO -Werror -march=armv8-a+crypto -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(aes_ce_cipher)" -D"KBUILD_MODNAME=KBUILD_STR(aes_ce_cipher)" -c -o arch/arm64/crypto/aes-ce-cipher.o /var/fpwork/rschiele/crossbuild/builds/aarch64-linux-gnu/linux-next/srcdir/src/linux/arch/arm64/crypto/aes-ce-cipher.c As a result it created a file for the assembler with the global .arch armv8-a+fp+simd+crypto at the beginning of the file. After the patch it created individual .arch armv8-a at individual places. It is not clear to me, why the extensions (fp+simd+crypto) got lost. Is that intended, such that the code needs special adaption for inline assembly using those extensions or is that loss of extensions a bug of that patch? Greetings! Robert

8 years, 4 months

[ACTIVITY] Week 48

by Yvan Roux

== Progress == o Linaro GCC (6/10) * More backports * Compared our various flavor of validation results * Looked at bug reports and mailing list questions on our last snapshot. o Upstream work (2/10) * Continue on sanitizing gfortran testsuite o Misc (2/10) * Various meetings * Discussed benchmarking infra with Bernie == Plan == o GCC 5.3 branch merge o Continue on-going tasks o Tuesday Off

8 years, 4 months

[ACTIVITY] 30th November - 4th December

by Bernie Ogden

Holiday [2/10] Port to microinstance - TCWG-432 [1/10] * Set up reporting for CPU2006 * Learned how to generate metadata, but not how to use it Trigger benchmarks on backports - TCWG-352 [2/10] * Figured out the rough shape * Created, didn't test, rough implementation TCWG-354 [3/10] * Build/run scaffolding for CoreMark Pro * Working for manual runs Misc [2/10] * Input validation for dispatcher script * Meeting with Ade on LAVA benchmarking * Meetings/mail/etc =Plan= Review, test, debug build-triggers-benchmark job Check CoreMark Pro run configuration, enable for automatic runs Review security with shared uinstance/main instance code Expose more data, benchmarks to bundles Debug/test Jenkins job in microinstance Create bootable image for at least 1 target, or know what the problems are Write up noise control report (if time) More support for SPEC-on-Android?

8 years, 4 months

[ACTIVITY] 30 Nov to 4 Dec 2015

by Prathamesh Kulkarni

* TCWG-72 (2/10) - Added new target hook to generate target-specific divmod libfunc - Builds cleanly now on x86_64, arm and arm-linux-gnueabihf - Sent to tcwg list for review * LTO spec2k6 build (2/10) - Built speck26 with LTO * Target hook (4/10) - Completed with ASM_OUTPUT_LABEL_REF - In progress - SIZE_ASM_OP to data hook, ASM_OUTPUT_SIZE_DIRECTIVE, ASM_OUTPUT_MEASURED_SIZE * Benchmarking (1/10) - tcwg-319: Job in progress for fp benchmarks with patch - tcwg-310 (loop peeling): Submitted job for running 252.eon - Both the jobs failed due to lab downtime, need to be re-run. - Received job template from Bernie for running benchmarks on cortex-a15. * Misc (1/10) - Meetings == Next Week == - Continue benchmarking spec2k6 with LTO - Look at bugs exposed by speck2k6 LTO build - Benchmarking tcwg-319, tcwg-310

8 years, 4 months

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linaro-toolchain December 2015