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From: <js...@ac...> - 2007-07-13 18:13:07
|
Nightly build on minnie ( SuSE 10.0, ppc32 ) started at 2007-07-13 09:00:01 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 == 219 tests, 10 stderr failures, 6 stdout failures, 0 posttest failures == memcheck/tests/leak-tree (stderr) memcheck/tests/leakotron (stdout) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_changes (stderr) memcheck/tests/xml1 (stderr) none/tests/faultstatus (stderr) none/tests/fdleak_cmsg (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) none/tests/ppc32/jm-fp (stdout) none/tests/ppc32/jm-fp (stderr) none/tests/ppc32/round (stdout) none/tests/ppc32/round (stderr) none/tests/ppc32/test_fx (stdout) none/tests/ppc32/test_fx (stderr) none/tests/ppc32/test_gx (stdout) |
|
From: Oswald B. <os...@kd...> - 2007-07-13 11:11:06
|
On Fri, Jul 13, 2007 at 09:57:47AM +0100, Julian Seward wrote: > > Each arena has a set of N_MALLOC_LISTS circular double-linked lists of > > free blocks, classified by size (see pszB_to_listNo). I think each > > list arbitrarily travels across all the Superblocks in the Arena. > > The arena's freelist[] array contains pointers to some arbitrary entry > > point in each list. > > (more) > > The mapping from block sizes to list numbers, and the number of lists, > is entirely arbitrary. The only requirement is that all block sizes get > mapped to one of the lists. The current scheme tends to work fairly > well but maybe you can find something better. > lists suck. trees are better. :) you might find some inspiration in the xfs allocator. on a related note, in the linux kernel allocation is a very hot topic currently - maybe that can be used somehow. -- Hi! I'm a .signature virus! Copy me into your ~/.signature, please! -- Chaos, panic, and disorder - my work here is done. |
|
From: Christoph B. <bar...@or...> - 2007-07-13 09:19:51
|
After about an hour there seems to be only one function that runs: 75373374 93.0560 memcheck memcheck vgPlain_arena_free More than 93% and increasing in vgPlain_arena_free. However it seems as if this function is not the real bottleneck. I have attached the output of opannotate for the file m_mallocfree.c. It shows that findSb() is the slowest part of the program. I guess it is inlined into vgPlain_arena_free. Greetings Christoph |
|
From: Julian S. <js...@ac...> - 2007-07-13 09:04:37
|
> Each arena has a set of N_MALLOC_LISTS circular double-linked lists of > free blocks, classified by size (see pszB_to_listNo). I think each > list arbitrarily travels across all the Superblocks in the Arena. > The arena's freelist[] array contains pointers to some arbitrary entry > point in each list. (more) The mapping from block sizes to list numbers, and the number of lists, is entirely arbitrary. The only requirement is that all block sizes get mapped to one of the lists. The current scheme tends to work fairly well but maybe you can find something better. J |
|
From: Julian S. <js...@ac...> - 2007-07-13 08:35:00
|
> after about 10 hours of runtime arena_malloc begins to use more and more of > runtime. After 15 hours arena_malloc uses around 25%. This is after applying your Superblock fix and Hashtable fix, yes? > Is there a document that describes the workings of the arena > implementation? It would help to reason about the causes of such a > behaviour. Each arena has a set of N_MALLOC_LISTS circular double-linked lists of free blocks, classified by size (see pszB_to_listNo). I think each list arbitrarily travels across all the Superblocks in the Arena. The arena's freelist[] array contains pointers to some arbitrary entry point in each list. When a block is freed it is put back on the relevant list, and swizzle is then called as an anti-fragmentation kludge. (see comments on that function) Some list contains blocks from a variety of sizes. eg list 15 contains blocks with sizes 33*VG_MIN_MALLOC_SZB to 64*VG_MIN_MALLOC_SZB. So if arena_malloc is doing a lot of searching, it could be because there are a large number of frees which put blocks back on the list, but these blocks are too small to satisfy the next malloc from that list and so there is a lot of searching to find the next big-enough block on the list. Maybe worth investigating the per-list behaviour of your application. Maybe need more different lists per Arena? J |
|
From: Christoph B. <bar...@gm...> - 2007-07-13 07:57:17
|
Hi, after about 10 hours of runtime arena_malloc begins to use more and more of runtime. After 15 hours arena_malloc uses around 25%. This is dependent on the usage pattern but this behaviour might be the reason why the current subroutine runs a week instead of the expected two hours. It seems as if the following line (around line 1063) is executed too often: if (b_bszB >= req_bszB) goto obtained_block; // success! I have attached a simple graph that shows how often the comparison is done. For each million of allocations I have summed up the number of such comparisons and divided by the number of allocations. The x-axis shows the allocations in millions. There are currently about 2.100.000.000 allocations. For each set of a million allocations there is the average number of comparisons shown on the y-axis. We see that for the first 1.450.000.000 allocations the average number of comparisons per allocation is about 1. There is a peak around 750.000.000 where for some time there were 600 comparisons per allocation. With the usage pattern that starts at 1.500.000.000 allocations the numbers get bigger. More time is spent to find a block. Is there a document that describes the workings of the arena implementation? It would help to reason about the causes of such a behaviour. Greetings Christoph |
|
From: Tom H. <th...@cy...> - 2007-07-13 02:31:10
|
Nightly build on alvis ( i686, Red Hat 7.3 ) started at 2007-07-13 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 == 256 tests, 27 stderr failures, 1 stdout failure, 0 posttest 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/match-overrun (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/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) memcheck/tests/x86/xor-undef-x86 (stderr) memcheck/tests/xml1 (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) |
|
From: Tom H. <th...@cy...> - 2007-07-13 02:19:07
|
Nightly build on dellow ( x86_64, Fedora 7 ) started at 2007-07-13 03:10:06 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 == 292 tests, 221 stderr failures, 105 stdout failures, 0 posttest failures == memcheck/tests/addressable (stdout) memcheck/tests/addressable (stderr) memcheck/tests/amd64/bt_everything (stdout) memcheck/tests/amd64/bt_everything (stderr) memcheck/tests/amd64/bug132146 (stdout) memcheck/tests/amd64/bug132146 (stderr) memcheck/tests/amd64/defcfaexpr (stderr) memcheck/tests/amd64/fxsave-amd64 (stdout) memcheck/tests/amd64/fxsave-amd64 (stderr) memcheck/tests/amd64/insn_basic (stdout) memcheck/tests/amd64/insn_basic (stderr) memcheck/tests/amd64/insn_fpu (stdout) memcheck/tests/amd64/insn_fpu (stderr) memcheck/tests/amd64/insn_mmx (stdout) memcheck/tests/amd64/insn_mmx (stderr) memcheck/tests/amd64/insn_sse (stdout) memcheck/tests/amd64/insn_sse (stderr) memcheck/tests/amd64/insn_sse2 (stdout) memcheck/tests/amd64/insn_sse2 (stderr) memcheck/tests/amd64/int3-amd64 (stdout) memcheck/tests/amd64/int3-amd64 (stderr) memcheck/tests/amd64/more_x87_fp (stdout) memcheck/tests/amd64/more_x87_fp (stderr) memcheck/tests/amd64/sse_memory (stdout) memcheck/tests/amd64/sse_memory (stderr) memcheck/tests/amd64/xor-undef-amd64 (stdout) memcheck/tests/amd64/xor-undef-amd64 (stderr) memcheck/tests/badaddrvalue (stdout) memcheck/tests/badaddrvalue (stderr) memcheck/tests/badfree-2trace (stderr) memcheck/tests/badfree (stderr) memcheck/tests/badjump (stderr) memcheck/tests/badjump2 (stderr) memcheck/tests/badloop (stderr) memcheck/tests/badpoll (stderr) memcheck/tests/badrw (stderr) memcheck/tests/brk (stderr) memcheck/tests/brk2 (stderr) memcheck/tests/buflen_check (stderr) memcheck/tests/clientperm (stdout) memcheck/tests/clientperm (stderr) memcheck/tests/custom_alloc (stderr) memcheck/tests/deep_templates (stdout) memcheck/tests/deep_templates (stderr) memcheck/tests/describe-block (stderr) memcheck/tests/doublefree (stderr) memcheck/tests/erringfds (stdout) memcheck/tests/erringfds (stderr) memcheck/tests/error_counts (stdout) memcheck/tests/errs1 (stderr) memcheck/tests/execve (stderr) memcheck/tests/execve2 (stderr) memcheck/tests/exitprog (stderr) memcheck/tests/fprw (stderr) memcheck/tests/fwrite (stderr) memcheck/tests/inits (stderr) memcheck/tests/inline (stdout) memcheck/tests/inline (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/leakotron (stdout) memcheck/tests/long_namespace_xml (stdout) memcheck/tests/long_namespace_xml (stderr) memcheck/tests/malloc1 (stderr) memcheck/tests/malloc2 (stderr) memcheck/tests/malloc3 (stdout) memcheck/tests/malloc3 (stderr) memcheck/tests/malloc_usable (stderr) memcheck/tests/manuel1 (stdout) memcheck/tests/manuel1 (stderr) memcheck/tests/manuel2 (stdout) memcheck/tests/manuel2 (stderr) memcheck/tests/manuel3 (stderr) memcheck/tests/match-overrun (stderr) memcheck/tests/memalign2 (stderr) memcheck/tests/memalign_test (stderr) memcheck/tests/memcmptest (stdout) memcheck/tests/memcmptest (stderr) memcheck/tests/mempool (stderr) memcheck/tests/metadata (stdout) memcheck/tests/metadata (stderr) memcheck/tests/mismatches (stderr) memcheck/tests/mmaptest (stderr) memcheck/tests/nanoleak (stderr) memcheck/tests/nanoleak2 (stderr) memcheck/tests/nanoleak_supp (stderr) memcheck/tests/new_nothrow (stderr) memcheck/tests/new_override (stdout) memcheck/tests/new_override (stderr) memcheck/tests/null_socket (stderr) memcheck/tests/oset_test (stdout) memcheck/tests/oset_test (stderr) memcheck/tests/overlap (stdout) memcheck/tests/overlap (stderr) memcheck/tests/partial_load_dflt (stderr) memcheck/tests/partial_load_ok (stderr) memcheck/tests/partiallydefinedeq (stdout) memcheck/tests/partiallydefinedeq (stderr) memcheck/tests/pdb-realloc (stderr) memcheck/tests/pdb-realloc2 (stdout) memcheck/tests/pdb-realloc2 (stderr) memcheck/tests/pipe (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/post-syscall (stdout) memcheck/tests/post-syscall (stderr) memcheck/tests/realloc1 (stderr) memcheck/tests/realloc2 (stderr) memcheck/tests/realloc3 (stderr) memcheck/tests/sh-mem-random (stdout) memcheck/tests/sh-mem-random (stderr) memcheck/tests/sh-mem (stderr) memcheck/tests/sigaltstack (stderr) memcheck/tests/sigkill (stderr) memcheck/tests/signal2 (stdout) memcheck/tests/signal2 (stderr) memcheck/tests/sigprocmask (stderr) memcheck/tests/stack_changes (stdout) memcheck/tests/stack_changes (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/str_tester (stderr) memcheck/tests/strchr (stderr) memcheck/tests/supp1 (stderr) memcheck/tests/supp2 (stderr) memcheck/tests/supp_unknown (stderr) memcheck/tests/suppfree (stderr) memcheck/tests/toobig-allocs (stderr) memcheck/tests/trivialleak (stderr) memcheck/tests/vcpu_bz2 (stdout) memcheck/tests/vcpu_bz2 (stderr) memcheck/tests/vcpu_fbench (stdout) memcheck/tests/vcpu_fbench (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/vcpu_fnfns (stderr) memcheck/tests/with-space (stdout) memcheck/tests/with-space (stderr) memcheck/tests/wrap1 (stdout) memcheck/tests/wrap1 (stderr) memcheck/tests/wrap2 (stdout) memcheck/tests/wrap2 (stderr) memcheck/tests/wrap3 (stdout) memcheck/tests/wrap3 (stderr) memcheck/tests/wrap4 (stdout) memcheck/tests/wrap4 (stderr) memcheck/tests/wrap5 (stdout) memcheck/tests/wrap5 (stderr) memcheck/tests/wrap6 (stdout) memcheck/tests/wrap6 (stderr) memcheck/tests/wrap7 (stdout) memcheck/tests/wrap7 (stderr) memcheck/tests/wrap8 (stdout) memcheck/tests/wrap8 (stderr) memcheck/tests/writev (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stdout) memcheck/tests/xml1 (stderr) memcheck/tests/zeropage (stdout) memcheck/tests/zeropage (stderr) cachegrind/tests/chdir (stderr) cachegrind/tests/clreq (stderr) cachegrind/tests/dlclose (stdout) cachegrind/tests/dlclose (stderr) cachegrind/tests/wrap5 (stdout) cachegrind/tests/wrap5 (stderr) callgrind/tests/clreq (stderr) callgrind/tests/simwork1 (stdout) callgrind/tests/simwork1 (stderr) callgrind/tests/simwork2 (stdout) callgrind/tests/simwork2 (stderr) callgrind/tests/simwork3 (stdout) callgrind/tests/simwork3 (stderr) callgrind/tests/threads (stderr) massif/tests/basic_malloc (stderr) massif/tests/toobig-allocs (stderr) massif/tests/true_html (stderr) massif/tests/true_text (stderr) lackey/tests/true (stderr) none/tests/amd64/bug127521-64 (stdout) none/tests/amd64/bug127521-64 (stderr) none/tests/amd64/bug132813-amd64 (stdout) none/tests/amd64/bug132813-amd64 (stderr) none/tests/amd64/bug132918 (stdout) none/tests/amd64/bug132918 (stderr) none/tests/amd64/clc (stdout) none/tests/amd64/clc (stderr) none/tests/amd64/fcmovnu (stdout) none/tests/amd64/fcmovnu (stderr) none/tests/amd64/fxtract (stdout) none/tests/amd64/fxtract (stderr) none/tests/amd64/insn_basic (stdout) none/tests/amd64/insn_basic (stderr) none/tests/amd64/insn_fpu (stdout) none/tests/amd64/insn_fpu (stderr) none/tests/amd64/insn_mmx (stdout) none/tests/amd64/insn_mmx (stderr) none/tests/amd64/insn_sse (stdout) none/tests/amd64/insn_sse (stderr) none/tests/amd64/insn_sse2 (stdout) none/tests/amd64/insn_sse2 (stderr) none/tests/amd64/jrcxz (stdout) none/tests/amd64/jrcxz (stderr) none/tests/amd64/looper (stdout) none/tests/amd64/looper (stderr) none/tests/amd64/nibz_bennee_mmap (stdout) none/tests/amd64/nibz_bennee_mmap (stderr) none/tests/amd64/rcl-amd64 (stdout) none/tests/amd64/rcl-amd64 (stderr) none/tests/amd64/shrld (stdout) none/tests/amd64/shrld (stderr) none/tests/amd64/slahf-amd64 (stdout) none/tests/amd64/slahf-amd64 (stderr) none/tests/amd64/smc1 (stdout) none/tests/amd64/smc1 (stderr) none/tests/ansi (stderr) none/tests/args (stdout) none/tests/args (stderr) none/tests/async-sigs (stdout) none/tests/async-sigs (stderr) none/tests/bitfield1 (stderr) none/tests/blockfault (stderr) none/tests/bug129866 (stdout) none/tests/bug129866 (stderr) none/tests/closeall (stderr) none/tests/coolo_sigaction (stdout) none/tests/coolo_sigaction (stderr) none/tests/coolo_strlen (stderr) none/tests/discard (stdout) none/tests/discard (stderr) none/tests/exec-sigmask (stderr) none/tests/execve (stderr) none/tests/faultstatus (stderr) none/tests/fcntl_setown (stderr) none/tests/fdleak_cmsg (stderr) none/tests/fdleak_creat (stderr) none/tests/fdleak_dup (stderr) none/tests/fdleak_dup2 (stderr) none/tests/fdleak_fcntl (stderr) none/tests/fdleak_ipv4 (stdout) none/tests/fdleak_ipv4 (stderr) none/tests/fdleak_open (stderr) none/tests/fdleak_pipe (stderr) none/tests/fdleak_socketpair (stderr) none/tests/floored (stdout) none/tests/floored (stderr) none/tests/fork (stdout) none/tests/fork (stderr) none/tests/fucomip (stderr) none/tests/gxx304 (stderr) none/tests/manythreads (stdout) none/tests/manythreads (stderr) none/tests/map_unaligned (stderr) none/tests/map_unmap (stdout) none/tests/map_unmap (stderr) none/tests/mq (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) none/tests/mremap2 (stderr) none/tests/munmap_exe (stderr) none/tests/nestedfns (stdout) none/tests/nestedfns (stderr) none/tests/pending (stdout) none/tests/pending (stderr) none/tests/pth_atfork1 (stdout) none/tests/pth_atfork1 (stderr) none/tests/pth_blockedsig (stdout) none/tests/pth_blockedsig (stderr) none/tests/pth_cancel1 (stdout) none/tests/pth_cancel1 (stderr) none/tests/pth_cancel2 (stderr) none/tests/pth_cvsimple (stdout) none/tests/pth_cvsimple (stderr) none/tests/pth_detached (stdout) none/tests/pth_detached (stderr) none/tests/pth_empty (stderr) none/tests/pth_exit (stderr) none/tests/pth_exit2 (stderr) none/tests/pth_mutexspeed (stdout) none/tests/pth_mutexspeed (stderr) none/tests/pth_once (stdout) none/tests/pth_once (stderr) none/tests/pth_rwlock (stderr) none/tests/pth_stackalign (stdout) none/tests/pth_stackalign (stderr) none/tests/rcrl (stdout) none/tests/rcrl (stderr) none/tests/readline1 (stdout) none/tests/readline1 (stderr) none/tests/res_search (stdout) none/tests/res_search (stderr) none/tests/resolv (stdout) none/tests/resolv (stderr) none/tests/rlimit_nofile (stderr) none/tests/sem (stderr) none/tests/semlimit (stderr) none/tests/sha1_test (stderr) none/tests/shell (stdout) none/tests/shell (stderr) none/tests/shell_valid1 (stderr) none/tests/shell_valid2 (stderr) none/tests/shell_valid3 (stderr) none/tests/shortpush (stderr) none/tests/shorts (stderr) none/tests/sigstackgrowth (stdout) none/tests/sigstackgrowth (stderr) none/tests/stackgrowth (stdout) none/tests/stackgrowth (stderr) none/tests/syscall-restart1 (stderr) none/tests/syscall-restart2 (stderr) none/tests/system (stderr) none/tests/thread-exits (stdout) none/tests/thread-exits (stderr) none/tests/threaded-fork (stdout) none/tests/threaded-fork (stderr) none/tests/threadederrno (stdout) none/tests/threadederrno (stderr) none/tests/tls (stdout) none/tests/tls (stderr) none/tests/vgprintf (stdout) none/tests/vgprintf (stderr) |
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From: Tom H. <th...@cy...> - 2007-07-13 02:17:26
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Nightly build on lloyd ( x86_64, Fedora Core 3 ) started at 2007-07-13 03:05:04 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 == 292 tests, 6 stderr failures, 1 stdout failure, 0 posttest failures == memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) memcheck/tests/xml1 (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) |
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From: Tom H. <th...@cy...> - 2007-07-13 02:14:57
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Nightly build on gill ( x86_64, Fedora Core 2 ) started at 2007-07-13 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 == 294 tests, 6 stderr failures, 1 stdout failure, 0 posttest failures == memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) none/tests/fdleak_fcntl (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) |
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From: <js...@ac...> - 2007-07-13 00:17:02
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Nightly build on g5 ( SuSE 10.1, ppc970 ) started at 2007-07-13 02:00:01 CEST 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 == 226 tests, 6 stderr failures, 2 stdout failures, 0 posttest failures == memcheck/tests/deep_templates (stdout) memcheck/tests/leak-cycle (stderr) memcheck/tests/leak-tree (stderr) memcheck/tests/pointer-trace (stderr) none/tests/faultstatus (stderr) none/tests/fdleak_cmsg (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) |