Hi Linaro Toolchain Group,
I am comparing execution time (run time) of sin() trigonometric function
between following glibc (including libm) libraries for aarch64 (juno cortex
a57) :
Linaro glibc 2.19, Linaro eglibc 2.19, eglibc 2.19 (from
http://www.eglibc.org/) and Linaro glibc 2.21.
My observation for execution time of sin():
with Linaro glibc 2.19 and eglibc 2.19 = 1m24.703s (approx)
whereas,
with Linaro eglibc 2.19 & Linaro glibc 2.21 = 0m25.243s (approx)
Has Linaro optimized the libm functions for aarch64 in Linaro eglibc 2.19 ?
If yes, please point me to relevant reference from where I can find more
information on them.
Since the eglibc development from version 2.19 has stopped, will Linaro
maintain its own development version of glibc ?
I am using below snippet code and linux 'time' command to calculate the
time.
void sin_func(void)
{
double incr = 0.732;
double result, count = 0.0;
printf("%s\n", __func__);
while (count < 105414350.0) {
result = sin(count);
count += incr;
}
}
Thanks.
--
with regards,
Virendra Kumar Pathak
== Progress ==
LLDB development [TCWG-855] [8/10]
-- Figure out build steps for building cross lldb-server with
arm-linux-genueabihf-g++
-- Debugging of lldb-server communication packets for fixing lldb-server
armhf crash problem.
-- Comparison with androidabi version to figure out missing pieces
Miscellaneous [2/10]
-- Ubuntu reinstall on laptop
-- Follow up on Czech Republic visa
-- Meetings, emails, discussions etc.
== Plan ==
LLDB development
-- Work on lldb-server for armhf and try to figure out crash problems
[TCWG-855]
End of sick leave (will work 100% from home until my cast is removed).
== Progress ==
o Upstream GCC (2/6)
* Back to ongoing patches
o Linaro GCC release (7/6)
* Reviewed FSF branch merge into 4.8/4.9 branches
* Reviewed patches for tcwg-realease script
* Sent a first batch of backports for 5.1
Still pending due to validation infra. issues
o Misc (1/6)
* Various meetings
== Plan ==
- Continue ongoing tasks
* One day off on Fri. [2/10]
# Progress #
* TCWG-805, aarch64 native debugging multi-arch support. [5/10]
Patches (part1) are posted upstream for review, need to rewrite some
of them. The rest of them are OK and can be pushed in after 7.10
branch is created.
Watchpoint support in multi-arch debugging. Both kernel and GDB need
some fixes. Ongoing.
* Complete the document of aarch64 tracepoint work. [1/10]
* FSF GDB. [2/10]
Review intel mpx patch again, and read something on intel
mpx stuff.
# Plan #
* TCWG-805, update some patches in part 1 patch series, and continue
the multi-arch watchpoint work.
--
Yao
== Progress ==
* Add REG_EQUAL note for arm_emit_movpair (1/10)
- Updated and reposted
- https://gcc.gnu.org/ml/gcc-patches/2015-07/msg00295.html
- https://gcc.gnu.org/ml/gcc-patches/2015-06/msg02066.html
* Factor conversion out of COND_EXPR - TCWG-849 (3/10)
- https://gcc.gnu.org/ml/gcc-patches/2015-07/msg00246.html
* TACT -TCWG-851 (2/10)
- Small examples now seem to work.
- Have to do cross testing
* Git work flow for upstream patches -TCWG-848 (1/10)
- Updated based on review
* Misc (3/10)
- Looked up LLVM documents
- Looked at the TODO list Renato provided
- gcc-patches, gcc-bugs list
- Meetings
== Plan ==
- GCC Bugs
- TACT driven optimization exploration for gcc
- Linaro bug 1318
== This Week ==
* TCWG-856 (2/10)
- submitted patch to flatten cfgloop.h:
https://gcc.gnu.org/ml/gcc-patches/2015-07/msg00277.html
* TCWG-777 (4/10)
- Modified pass to not generate redundant stores
- Investigating ICE caused by the pass during gcc build
- Discussions for possible approaches with Christophe and Kugan
- Reading thru documentation on optabs and ccmp patches
* Misc (4/10)
- Patch sent upstream which fixes segfault in gcc for -dx option.
- Filed upstream binutils bug for "branch range out of error"
- Conference calls
- Travel to Mumbai for US Visa OFC appointment
== Next Week ==
- Word towards committing cfgloop.h flattening patch
- Continue working on TCWG-830, TCWG-777, TCWG-847
== Progress ==
* Maintenance (CARD-1833 4/10)
- ADD/SUB with negative immediates solved by a year old
patch from ARM, sigh. On to the next bug... :(
- Working on https://llvm.org/PR20700
* Buildbots (CARD-1823 2/10)
- Moving benchmark bot to CMake, fixing deepcopy bug in
environment that broke new builds
- Restarting a few bots that crashed
* Background (4/10)
- Code review, meetings, discussions, etc.
- A lot of code review this week...
- Blocking disrespectful web spiders in llvm.org
- Emacs now almost works as I expect
== Plan ==
* Continue PR20700
* Have a look at Polybench
* Look for some more bugs to fix
Benchmarking presentation [7/10]
* More reading
* Ran through a couple more drafts
Misc [3/10]
* Featuring a bug in my backup scripts that took ~1/10 to fix
=Plan=
Back to benchmark automation as main activity
Presentation in the background
