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From: Nicholas N. <nj...@cs...> - 2008-01-25 23:06:45
|
On Fri, 25 Jan 2008, Tom Hughes wrote: >>> massif/tests/long-names (post) >> >> This test is failing on all the nightly test machines. Tom, can you >> send me a .post.diff file? Thanks. > > Here's the one from Fedora 8 - there is one extra character on the end > of each of the long strings of characters. That puzzled me for a bit, but I think it's because on my machine the relevant line has an address like 0x8048394, and I suspect on your machines the address is lower and so has one fewer chars in it. Can you send me the massif.out.<pid> file from an invocation of long-names so I can confirm? Thanks. I guess the way to make this deterministic is to print leading zeroes in the addresses. I'm not sure if I want to do that, though. Hmm. N |
|
From: Konstantin S. <kon...@gm...> - 2008-01-25 16:54:50
|
On Jan 25, 2008 4:52 PM, Julian Seward <js...@ac...> wrote: > > > One more question regarding helgrind performance: > > is it possible to track only certain memory addresses in helgrind and > > simply ignore others (i.e. don't even keep shadow values for them)? > > Certainly the old (2.2.0) Helgrind had a mode in which it could > ignore stack references. That should improve performance, although > it can be difficult to decide for sure what is and is not a stack > reference. Such mode could be useful in the new helgrind as well, at least for the sake of experiment. It isn't that hard, is it? > > > I have for a while been considering a different idea, which is to take > advantage of the facts that (1) Valgrind only runs one thread at once > and (2) for periods of time when a thread is running and does not do > any sync events or lock events, these state machines tend to be > idempotent -- that is, the second and subsequent presentations of the > same address to the state machine do not change its state. > > The basic idea would be to note all memory references in a small > cache. Then, when a new reference appears, first see if it is > already in the cache; if so ignore it. When there is a thread > switch or synchronisation event, the cache is flushed. The core > provides enough hints to know when this cache should be flushed. > If the cache access is fast enough relative to the full SM, and > enough duplicate addresses appear, this could provide a substantial > speedup. > > The advantage, relative to skipping stack references, is that > you don't lose any functionality. > Sounds very promising! How many instructions are executed by scheduler between thread switches? --kcc |
|
From: Julian S. <js...@ac...> - 2008-01-25 13:55:02
|
> One more question regarding helgrind performance: > is it possible to track only certain memory addresses in helgrind and > simply ignore others (i.e. don't even keep shadow values for them)? Certainly the old (2.2.0) Helgrind had a mode in which it could ignore stack references. That should improve performance, although it can be difficult to decide for sure what is and is not a stack reference. I have for a while been considering a different idea, which is to take advantage of the facts that (1) Valgrind only runs one thread at once and (2) for periods of time when a thread is running and does not do any sync events or lock events, these state machines tend to be idempotent -- that is, the second and subsequent presentations of the same address to the state machine do not change its state. The basic idea would be to note all memory references in a small cache. Then, when a new reference appears, first see if it is already in the cache; if so ignore it. When there is a thread switch or synchronisation event, the cache is flushed. The core provides enough hints to know when this cache should be flushed. If the cache access is fast enough relative to the full SM, and enough duplicate addresses appear, this could provide a substantial speedup. The advantage, relative to skipping stack references, is that you don't lose any functionality. J |
|
From: Nicholas N. <nj...@cs...> - 2008-01-25 12:38:49
|
On Fri, 25 Jan 2008, Tom Hughes wrote: > massif/tests/long-names (post) This test is failing on all the nightly test machines. Tom, can you send me a .post.diff file? Thanks. Nick |
|
From: Konstantin S. <kon...@gm...> - 2008-01-25 10:23:52
|
Julian, all, One more question regarding helgrind performance: is it possible to track only certain memory addresses in helgrind and simply ignore others (i.e. don't even keep shadow values for them)? Will this improve helgrind's performance? Any suggestion how to implement that? There could be different scenarios of feeding the list of addresses to helgrind: - static analysis which says that certain addresses are 100% thread safe. - code annotations. - list of modules/functions/globals/etc that we can ignore. Thanks, --kcc |
|
From: Tom H. <th...@cy...> - 2008-01-25 04:04:20
|
Nightly build on alvis ( i686, Red Hat 7.3 ) started at 2008-01-25 03:15:07 GMT 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 == 339 tests, 84 stderr failures, 1 stdout failure, 29 post failures == memcheck/tests/addressable (stderr) memcheck/tests/badjump (stderr) memcheck/tests/describe-block (stderr) memcheck/tests/erringfds (stderr) memcheck/tests/leak-0 (stderr) memcheck/tests/leak-cycle (stderr) memcheck/tests/leak-pool-0 (stderr) memcheck/tests/leak-pool-1 (stderr) memcheck/tests/leak-pool-2 (stderr) memcheck/tests/leak-pool-3 (stderr) memcheck/tests/leak-pool-4 (stderr) memcheck/tests/leak-pool-5 (stderr) memcheck/tests/leak-regroot (stderr) memcheck/tests/leak-tree (stderr) memcheck/tests/long_namespace_xml (stderr) memcheck/tests/lsframe1 (stderr) memcheck/tests/lsframe2 (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/match-overrun (stderr) memcheck/tests/noisy_child (stderr) memcheck/tests/partial_load_dflt (stderr) memcheck/tests/partial_load_ok (stderr) memcheck/tests/partiallydefinedeq (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/sigkill (stderr) memcheck/tests/stack_changes (stderr) memcheck/tests/supp_unknown (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) 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) none/tests/blockfault (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) 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/tc04_free_lock (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/tc10_rec_lock (stderr) helgrind/tests/tc11_XCHG (stderr) helgrind/tests/tc12_rwl_trivial (stderr) helgrind/tests/tc13_laog1 (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) exp-drd/tests/fp_race (stderr) exp-drd/tests/fp_race2 (stderr) exp-drd/tests/matinv (stderr) exp-drd/tests/pth_barrier (stderr) exp-drd/tests/pth_broadcast (stderr) exp-drd/tests/pth_cond_race (stderr) exp-drd/tests/pth_cond_race2 (stderr) exp-drd/tests/pth_create_chain (stderr) exp-drd/tests/pth_detached (stderr) exp-drd/tests/pth_detached2 (stderr) exp-drd/tests/sem_as_mutex (stderr) exp-drd/tests/sem_as_mutex2 (stderr) exp-drd/tests/sigalrm (stderr) exp-drd/tests/tc17_sembar (stderr) exp-drd/tests/tc18_semabuse (stderr) |
|
From: Tom H. <th...@cy...> - 2008-01-25 03:46:16
|
Nightly build on aston ( x86_64, Fedora Core 5 ) started at 2008-01-25 03:20:06 GMT 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 == 375 tests, 15 stderr failures, 1 stdout failure, 1 post failure == memcheck/tests/addressable (stderr) memcheck/tests/badjump (stderr) memcheck/tests/describe-block (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/match-overrun (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/supp_unknown (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) massif/tests/long-names (post) none/tests/blockfault (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) exp-drd/tests/pth_cond_race (stderr) exp-drd/tests/sem_as_mutex2 (stderr) |
|
From: Tom H. <th...@cy...> - 2008-01-25 03:39:04
|
Nightly build on trojan ( x86_64, Fedora Core 6 ) started at 2008-01-25 03:25:04 GMT 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 == 373 tests, 7 stderr failures, 5 stdout failures, 1 post failure == 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) massif/tests/long-names (post) none/tests/cmdline1 (stdout) none/tests/cmdline2 (stdout) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) exp-drd/tests/sem_as_mutex2 (stderr) ================================================= == 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 == 373 tests, 8 stderr failures, 5 stdout failures, 1 post failure == 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) massif/tests/long-names (post) none/tests/cmdline1 (stdout) none/tests/cmdline2 (stdout) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) exp-drd/tests/sem_as_mutex2 (stderr) ================================================= == Difference between 24 hours ago and now == ================================================= *** old.short Fri Jan 25 03:32:11 2008 --- new.short Fri Jan 25 03:39:03 2008 *************** *** 8,10 **** ! == 373 tests, 8 stderr failures, 5 stdout failures, 1 post failure == memcheck/tests/pointer-trace (stderr) --- 8,10 ---- ! == 373 tests, 7 stderr failures, 5 stdout failures, 1 post failure == memcheck/tests/pointer-trace (stderr) *************** *** 19,21 **** none/tests/mremap2 (stdout) - helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc20_verifywrap (stderr) --- 19,20 ---- |
|
From: Tom H. <th...@cy...> - 2008-01-25 03:38:46
|
Nightly build on lloyd ( x86_64, Fedora 7 ) started at 2008-01-25 03:05:12 GMT 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 == 373 tests, 8 stderr failures, 2 stdout failures, 1 post failure == memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) massif/tests/long-names (post) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) exp-drd/tests/pth_cond_race (stderr) |
|
From: Tom H. <th...@cy...> - 2008-01-25 03:28:56
|
Nightly build on dellow ( x86_64, Fedora 8 ) started at 2008-01-25 03:10:04 GMT 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 == 373 tests, 9 stderr failures, 2 stdout failures, 1 post failure == memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) massif/tests/long-names (post) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) exp-drd/tests/pth_cond_race (stderr) ================================================= == 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 == 373 tests, 9 stderr failures, 3 stdout failures, 1 post failure == memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) massif/tests/long-names (post) none/tests/mremap (stderr) none/tests/mremap2 (stdout) none/tests/pth_detached (stdout) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) exp-drd/tests/pth_cond_race (stderr) ================================================= == Difference between 24 hours ago and now == ================================================= *** old.short Fri Jan 25 03:19:38 2008 --- new.short Fri Jan 25 03:28:55 2008 *************** *** 8,10 **** ! == 373 tests, 9 stderr failures, 3 stdout failures, 1 post failure == memcheck/tests/malloc_free_fill (stderr) --- 8,10 ---- ! == 373 tests, 9 stderr failures, 2 stdout failures, 1 post failure == memcheck/tests/malloc_free_fill (stderr) *************** *** 17,19 **** none/tests/mremap2 (stdout) - none/tests/pth_detached (stdout) helgrind/tests/tc18_semabuse (stderr) --- 17,18 ---- |
|
From: Tom H. <th...@cy...> - 2008-01-25 03:14:36
|
Nightly build on gill ( x86_64, Fedora Core 2 ) started at 2008-01-25 03:00:02 GMT 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 == 375 tests, 30 stderr failures, 1 stdout failure, 1 post failure == memcheck/tests/addressable (stderr) memcheck/tests/badjump (stderr) memcheck/tests/describe-block (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/match-overrun (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/supp_unknown (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) massif/tests/long-names (post) none/tests/blockfault (stderr) none/tests/fdleak_fcntl (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) 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) |