On Apr 1, 2014, at 5:48 AM, Maxim Kuvyrkov <maxim.kuvyr...@linaro.org> wrote:
> == Week of March 24th == > > - STREAM regression (TCWG-388, 5/10) > -- Finished prototype patch. The patch adds modeling of ARM L2 > auto-prefetcher hardware to GCC scheduler (the model is very simple as > auto-prefetcher is very lightly documented). Half of the patch cleans up and > improves GCC scheduler, and the other half implements the auto-prefetcher > model. > -- While looking into ARM scheduling support noticed that ARM doesn't use > multipass lookahead scheduling, which surprised me. Enabled it (multipass > scheduling) in my patches. > > - Looked into lll_timed_wait Glibc/uClibc bug upstream (1/10) > -- https://sourceware.org/ml/libc-alpha/2014-03/msg00905.html > > - Various discussions and reviews (4/10) > > == Week of March 30th == > > - STREAM regression (TCWG-388) > -- Benchmark patches on SPEC2k and find/confirm best values for tuning > parameters: > --- dfa_lookahead: should normally be issue_rate-1. > --- L2 auto-prefetcher queue depth: new tuning knob. > -- Investigate any performance regressions from the patches. Almost forgot: In preparation for benchmarking runs figured out how to configure chromeos+crouton chromebook for benchmarking (this avoids background Chrome processes from clobbering performance results): 1. At the login screen pressing ctrl+alt+f2 to switch to VT2 2. login into shell at VT2 3. "sudo stop ui" will stop session_manager and kill all chrome processes 4. switch back to VT2 (ctrl+alt+f2) 5. enter crouton chroot: "sudo startcli" 6. ssh to your chroot 7. run cpufreq to run CPUs at full throttle 8. run benchmarks The caveat is that only CLI-type chroot is suitable with chrome-os's X server down. Additionally, I've added NFSv4 support to said crouton chroot by rebuilding modules for ChromeOS kernel with NFSv4 included (https://github.com/dnschneid/crouton/wiki/Build-chrome-os-kernel-and-kernel-modules). > > - lll_timed_wait Glibc/uClibc bug > -- Make sure it is fixed upstream. Possibly backport to Linaro branches. > > -- > Maxim Kuvyrkov > www.linaro.org > -- Maxim Kuvyrkov www.linaro.org _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
