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From: Nicholas N. <nj...@cs...> - 2008-09-24 21:57:12
|
On Tue, 23 Sep 2008, Danny Robson wrote: > This is some interesting timing! In the last few months I've been > hacking away at Valgrind based code, looking at building performance > analysis tools. > > As part of this we have a modified Valgrind/VEX which allows threads to > run in parallel. This is mainly Valgrind core, as: > * Some of the tools are a little difficult to parallelise (as has been > pointed out in the Valgrind documentation) > * We are developing our own tools > > The main areas we looked at were code caching mechanisms and atomic > instruction implementations. We got a reasonable speedup until around 8 > CPUs. > > If people are interested in more details I can give more specifics or > can be contacted off list. I can forward code or more implementation > details. As it stands, the modifications work right now, but there is > still a reasonable amount of experiment code present. > > If this sounds like an appealing addition to Valgrind proper then I can > clean up the code into a more sane series of patches. I'm interested in hearing about it. Section 3.14 of http://valgrind.org/docs/valgrind2007.pdf discusses the difficulties of multithreading when tools use shadow memory. Do you have a solution for that, or do you just not worry about it because your tools don't use shadow memory? Nick |
|
From: Philippe W. <phi...@sk...> - 2008-09-24 16:01:20
|
I have started implementing user snapshot and "user delta snapshot" in massif.
This mail describes what I have already done and what I will (try to) do next,
so as to get feedback about what I have done and intends to do next.
What has been done already:
* add a massif user request to take a user snapshot
This user request has currently one argument : a string description of the
user snapshot reason.
* these user snapshots are written in a file which has the same format as
the standard massif output file.
(default name for this file = massif_us.out.%p)
* there is no maximum nr of user snapshots, as these user snapshots are written
"on the fly" in the output file.
* I have added a "what" string component to the Snapshot record.
(the main ideas behind this are:
re-use (as much as possible) same output format so that tools reading the
snapshot output (e.g. ms_print) can both handle the Peak/Normal snapshot
and the User snapshot
* what I will (try to do) next:
* have the what string of a user snapshot shown by ms_print
(I intend to put this string at the end of the line containing the snapshot nr and
other summary data)
* extend the format so as to support a "delta"
i.e. instead of just having the nr of bytes allocated at a certain execution point,
it will also be possible to have the increase/decrease compared to another
snapshot
* based on that, the massif request "take user snapshot" will have one additional
argument "Boolean delta_snapshot", so that delta values are also output.
Delta will be computed between the newly taken user snapshot and the previously
taken user snapshot
* ms_print is then to be upgraded to allow to either print the absolute values
and/or to print the delta values (I have zero experience with perl so volunteers to help
on this will be welcome)
Any feedback about the above is welcome.
|
|
From: Tom H. <th...@cy...> - 2008-09-24 03:27:11
|
Nightly build on alvis ( i686, Red Hat 7.3 ) started at 2008-09-24 03:15:02 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 366 tests, 80 stderr failures, 2 stdout failures, 29 post failures == exp-ptrcheck/tests/bad_percentify (stderr) exp-ptrcheck/tests/base (stderr) exp-ptrcheck/tests/ccc (stderr) exp-ptrcheck/tests/fp (stderr) exp-ptrcheck/tests/globalerr (stderr) exp-ptrcheck/tests/hackedbz2 (stderr) exp-ptrcheck/tests/hp_bounds (stderr) exp-ptrcheck/tests/hp_dangle (stderr) exp-ptrcheck/tests/justify (stderr) exp-ptrcheck/tests/partial_bad (stderr) exp-ptrcheck/tests/partial_good (stderr) exp-ptrcheck/tests/pth_create (stderr) exp-ptrcheck/tests/pth_specific (stderr) exp-ptrcheck/tests/realloc (stderr) exp-ptrcheck/tests/stackerr (stderr) exp-ptrcheck/tests/strcpy (stderr) exp-ptrcheck/tests/supp (stderr) exp-ptrcheck/tests/tricky (stderr) exp-ptrcheck/tests/unaligned (stderr) exp-ptrcheck/tests/zero (stderr) helgrind/tests/hg01_all_ok (stderr) helgrind/tests/hg02_deadlock (stderr) helgrind/tests/hg03_inherit (stderr) helgrind/tests/hg04_race (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/hg06_readshared (stderr) helgrind/tests/tc01_simple_race (stderr) helgrind/tests/tc02_simple_tls (stderr) helgrind/tests/tc03_re_excl (stderr) helgrind/tests/tc05_simple_race (stderr) helgrind/tests/tc06_two_races (stderr) helgrind/tests/tc07_hbl1 (stderr) helgrind/tests/tc08_hbl2 (stderr) helgrind/tests/tc09_bad_unlock (stderr) helgrind/tests/tc11_XCHG (stderr) helgrind/tests/tc12_rwl_trivial (stderr) helgrind/tests/tc14_laog_dinphils (stderr) helgrind/tests/tc16_byterace (stderr) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc19_shadowmem (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) helgrind/tests/tc23_bogus_condwait (stderr) helgrind/tests/tc24_nonzero_sem (stderr) massif/tests/alloc-fns-A (post) massif/tests/alloc-fns-B (post) massif/tests/basic (post) massif/tests/basic2 (post) massif/tests/big-alloc (post) massif/tests/culling1 (stderr) massif/tests/culling2 (stderr) massif/tests/custom_alloc (post) massif/tests/deep-A (post) massif/tests/deep-B (stderr) massif/tests/deep-B (post) massif/tests/deep-C (stderr) massif/tests/deep-C (post) massif/tests/deep-D (post) massif/tests/ignoring (post) massif/tests/insig (post) massif/tests/long-names (post) massif/tests/long-time (post) massif/tests/new-cpp (post) massif/tests/null (post) massif/tests/one (post) massif/tests/overloaded-new (post) massif/tests/peak (post) massif/tests/peak2 (stderr) massif/tests/peak2 (post) massif/tests/realloc (stderr) massif/tests/realloc (post) massif/tests/thresholds_0_0 (post) massif/tests/thresholds_0_10 (post) massif/tests/thresholds_10_0 (post) massif/tests/thresholds_10_10 (post) massif/tests/thresholds_5_0 (post) massif/tests/thresholds_5_10 (post) massif/tests/zero1 (post) massif/tests/zero2 (post) memcheck/tests/file_locking (stderr) memcheck/tests/leak-0 (stderr) memcheck/tests/leak-cycle (stderr) memcheck/tests/leak-regroot (stderr) memcheck/tests/leak-tree (stderr) memcheck/tests/long_namespace_xml (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/origin1-yes (stderr) memcheck/tests/origin4-many (stderr) memcheck/tests/origin5-bz2 (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_changes (stderr) memcheck/tests/varinfo1 (stderr) memcheck/tests/varinfo2 (stderr) memcheck/tests/varinfo3 (stderr) memcheck/tests/varinfo4 (stderr) memcheck/tests/varinfo5 (stderr) memcheck/tests/varinfo6 (stderr) memcheck/tests/x86/bug152022 (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) memcheck/tests/x86/xor-undef-x86 (stderr) memcheck/tests/xml1 (stderr) none/tests/blockfault (stderr) none/tests/cmdline2 (stdout) none/tests/mremap2 (stdout) none/tests/shell (stderr) none/tests/shell_valid1 (stderr) none/tests/shell_valid2 (stderr) none/tests/shell_valid3 (stderr) |
|
From: Tom H. <th...@cy...> - 2008-09-24 03:07:05
|
Nightly build on lloyd ( x86_64, Fedora 7 ) started at 2008-09-24 03:05:09 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 458 tests, 11 stderr failures, 3 stdout failures, 0 post failures == exp-ptrcheck/tests/base (stderr) exp-ptrcheck/tests/ccc (stderr) exp-ptrcheck/tests/pth_create (stderr) exp-ptrcheck/tests/pth_specific (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) memcheck/tests/file_locking (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/scalar (stderr) none/tests/blockfault (stderr) none/tests/cmdline2 (stdout) none/tests/mremap2 (stdout) |
|
From: Tom H. <th...@cy...> - 2008-09-24 03:06:20
|
Nightly build on aston ( x86_64, Fedora Core 5 ) started at 2008-09-24 03:20:06 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 464 tests, 10 stderr failures, 2 stdout failures, 0 post failures == exp-ptrcheck/tests/base (stderr) exp-ptrcheck/tests/ccc (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) memcheck/tests/file_locking (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/x86/scalar (stderr) none/tests/blockfault (stderr) none/tests/cmdline2 (stdout) none/tests/mremap2 (stdout) |
|
From: Tom H. <th...@cy...> - 2008-09-24 02:48:39
|
Nightly build on trojan ( x86_64, Fedora Core 6 ) started at 2008-09-24 03:25:06 BST Results differ from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 462 tests, 12 stderr failures, 5 stdout failures, 0 post failures == exp-ptrcheck/tests/ccc (stderr) exp-ptrcheck/tests/pth_create (stderr) exp-ptrcheck/tests/pth_specific (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) memcheck/tests/file_locking (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/bug133694 (stdout) memcheck/tests/x86/bug133694 (stderr) memcheck/tests/x86/scalar (stderr) none/tests/blockfault (stderr) none/tests/cmdline1 (stdout) none/tests/cmdline2 (stdout) none/tests/mremap2 (stdout) ================================================= == Results from 24 hours ago == ================================================= Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 462 tests, 13 stderr failures, 5 stdout failures, 0 post failures == exp-ptrcheck/tests/ccc (stderr) exp-ptrcheck/tests/pth_create (stderr) exp-ptrcheck/tests/pth_specific (stderr) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) memcheck/tests/file_locking (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/bug133694 (stdout) memcheck/tests/x86/bug133694 (stderr) memcheck/tests/x86/scalar (stderr) none/tests/blockfault (stderr) none/tests/cmdline1 (stdout) none/tests/cmdline2 (stdout) none/tests/mremap2 (stdout) ================================================= == Difference between 24 hours ago and now == ================================================= *** old.short Wed Sep 24 03:36:11 2008 --- new.short Wed Sep 24 03:48:30 2008 *************** *** 8,10 **** ! == 462 tests, 13 stderr failures, 5 stdout failures, 0 post failures == exp-ptrcheck/tests/ccc (stderr) --- 8,10 ---- ! == 462 tests, 12 stderr failures, 5 stdout failures, 0 post failures == exp-ptrcheck/tests/ccc (stderr) *************** *** 12,14 **** exp-ptrcheck/tests/pth_specific (stderr) - helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc20_verifywrap (stderr) --- 12,13 ---- |
|
From: Tom H. <th...@cy...> - 2008-09-24 02:27:23
|
Nightly build on gill ( x86_64, Fedora Core 2 ) started at 2008-09-24 03:00:03 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 464 tests, 33 stderr failures, 4 stdout failures, 0 post failures == exp-ptrcheck/tests/ccc (stderr) exp-ptrcheck/tests/hackedbz2 (stderr) helgrind/tests/hg01_all_ok (stderr) helgrind/tests/hg02_deadlock (stderr) helgrind/tests/hg03_inherit (stderr) helgrind/tests/hg04_race (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/tc01_simple_race (stderr) helgrind/tests/tc05_simple_race (stderr) helgrind/tests/tc06_two_races (stderr) helgrind/tests/tc09_bad_unlock (stderr) helgrind/tests/tc14_laog_dinphils (stderr) helgrind/tests/tc16_byterace (stderr) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc19_shadowmem (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) helgrind/tests/tc23_bogus_condwait (stderr) memcheck/tests/file_locking (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/origin5-bz2 (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/varinfo6 (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) none/tests/amd64/insn_ssse3 (stdout) none/tests/amd64/insn_ssse3 (stderr) none/tests/amd64/ssse3_misaligned (stderr) none/tests/blockfault (stderr) none/tests/cmdline2 (stdout) none/tests/fdleak_fcntl (stderr) none/tests/mremap2 (stdout) none/tests/x86/insn_ssse3 (stdout) none/tests/x86/insn_ssse3 (stderr) none/tests/x86/ssse3_misaligned (stderr) |