search for: memalign

Hi, I'm currently R porting SF Mersenne Twister algorithm of Matsumoto and Saito. To get the full power of their code, I want to use their fonction fill_array32 which need aligned memory. That is to say I need to use the C function memalign on windows, posix_memalign on linux and classic malloc on Mac OS. In 'writing R extenstion', they recommand to use R_alloc function to allocate memory in C. Does R_alloc return a pointer to aligned memory? if not how can I do this? probably no, because R crashes when I succesively R_al...

Hi, I'm currently R porting SF Mersenne Twister algorithm of Matsumoto and Saito. To get the full power of their code, I want to use their fonction fill_array32 which need aligned memory. That is to say I need to use the C function memalign on windows, posix_memalign on linux and classic malloc on Mac OS. In 'writing R extenstion', they recommand to use R_alloc function to allocate memory in C. Does R_alloc return a pointer to aligned memory? if not how can I do this? probably no, because R crashes when I succesively R_al...

...irst Samba 1.9.18p6 doesn't compile under SCO Unix 3.2v4.2: > > Linking smbd > undefined first referenced > symbol in file > getpagesize slprintf.o > mprotect slprintf.o > memalign slprintf.o > ld fatal: Symbol referencing errors. No output written to smbd > *** Error code 13 > > Stop. > # Yes, unfortunately SCO 3.2v4.2 doesn't have these functions. I created dummy implementations so that I could link. The vslprintf() functi...

...s (it was a problem with code using sprintf) and released it as 1.9.18p6 on Sunday, May 11th. Please note that there is no published root exploit for this problem, other than a denial of service (which is still very serious). Unfortunately, in the haste to fix the problem he used a non-POSIX api, memalign(), in code to simulate the snprintf() call that sprintf was replaced with. This and some of the fix code has caused compile problems on some UNIX systems. In order to fix these compile problems on as wide a range of systems as possible, I'd appreciate it if people could send me the man pages f...

...est/ptr_ring.c b/tools/virtio/ringtest/ptr_ring.c index 26dc1d2..deb36af 100644 --- a/tools/virtio/ringtest/ptr_ring.c +++ b/tools/virtio/ringtest/ptr_ring.c @@ -17,6 +17,11 @@ typedef pthread_spinlock_t spinlock_t; typedef int gfp_t; +static void *kmalloc(unsigned size, gfp_t gfp) +{ + return memalign(64, size); +} + static void *kzalloc(unsigned size, gfp_t gfp) { void *p = memalign(64, size);

...est/ptr_ring.c b/tools/virtio/ringtest/ptr_ring.c index 26dc1d2..deb36af 100644 --- a/tools/virtio/ringtest/ptr_ring.c +++ b/tools/virtio/ringtest/ptr_ring.c @@ -17,6 +17,11 @@ typedef pthread_spinlock_t spinlock_t; typedef int gfp_t; +static void *kmalloc(unsigned size, gfp_t gfp) +{ + return memalign(64, size); +} + static void *kzalloc(unsigned size, gfp_t gfp) { void *p = memalign(64, size);

...don't > think there is a way to annotate calls malloc to have some specific > alignment from the backend, that has effect on passes before the > backend. Note that this only applies to base types. Vector types certainly can require larger alignment in practice and that's why posix_memalign exists. Joerg

...this is extremly slow, check it out with Solaris truss. Use sockets with large I/O or shared memory on the same system. To see the difference try timex dd if=xyz of=lll bs=5k vs timex dd if=xyz of=lll bs=1024k 3. When allocating memory which will be accessed all the time use valloc() which is memalign(sysconf(_SC_PAGESIZE),size) It aligns memory to the page, so memory copies are word/page align and therefore faster, ie. 4 bytes are copied at once instead of a byte at once. 4. If you use GigaBit ethernet to get performance you need to read/write 64Kbytes to the socket and let the OS break it up...

Hola, I am trying to isolate the memory leak I suspect in a mailman installation ? I found: http://blogs.sun.com/sanjeevb/date/200506 It gives an error: god at irt-smtp-02:~ 9:21am 65 # ./memleak.d 10312 dtrace: failed to compile script ./memleak.d: line 3: probe description pid10312:libc.so.1:malloc:entry does not match any probes I am on SunOS 5.10 Generic_127112-07 i86pc i386 i86pc Are

...when looking at the code. -- memleak http://pown.alluc.org/210.swf http://pown.alluc.org/991.swf There's a huge memleak reported by valgrind (this is from a run of 210.swf): ==31127== 224,784,144 bytes in 177 blocks are still reachable in loss record 5,098 of 5,098 ==31127== at 0x4021990: memalign (vg_replace_malloc.c:332) ==31127== by 0x510ECE6: av_malloc (mem.c:61) ==31127== by 0x4D71B01: avcodec_default_get_buffer (utils.c:308) ==31127== by 0x4F4F789: vp56_decode_frame (vp56.c:509) ==31127== by 0x4D70B7D: avcodec_decode_video (utils.c:937) ==31127== by 0x406712D: swfdec_vid...

.../samba/bin/smbpasswd" -DSMB_PASSWD_FILE="/us >r/local/samba/private/smbpasswd" >Using LIBS = >Compiling slprintf.c >/usr/lib/cmplrs/cc/cfe: Error: slprintf.c, line 48: Type for rhs of assignment e >xpression is incompatible with lhs (3.3.16.1) > buf = memalign(pagesize, len); > ----^ >*** Exit 1 >Stop. Anyone who knows C and samba better than I do have any ideas? TIA, Bruce Bruce Bowler, Research Associate 207.633.9600 (voice) Bigelow Laboratory for Ocean Sciences 207.633.9641 (fax) PO Box 475...

"Ogg Vorbis uses the Ogg bistream format, and the correct extension is .ogg" -- http://www.xiph.org/ogg/vorbis/faq.html I'm guessing it should read 'bitstream'. <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org'

..._cacheline_aligned_in_smp __attribute__ ((aligned (SMP_CACHE_BYTES))) +#define unlikely(x) (__builtin_expect(!!(x), 0)) +#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a)) +typedef pthread_spinlock_t spinlock_t; + +typedef int gfp_t; +static void *kzalloc(unsigned size, gfp_t gfp) +{ + void *p = memalign(64, size); + if (!p) + return p; + memset(p, 0, size); + + return p; +} + +static void kfree(void *p) +{ + if (p) + free(p); +} + +static void spin_lock_init(spinlock_t *lock) +{ + int r = pthread_spin_init(lock, 0); + assert(!r); +} + +static void spin_lock(spinlock_t *lock) +{ + int ret = pthre...

..._cacheline_aligned_in_smp __attribute__ ((aligned (SMP_CACHE_BYTES))) +#define unlikely(x) (__builtin_expect(!!(x), 0)) +#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a)) +typedef pthread_spinlock_t spinlock_t; + +typedef int gfp_t; +static void *kzalloc(unsigned size, gfp_t gfp) +{ + void *p = memalign(64, size); + if (!p) + return p; + memset(p, 0, size); + + return p; +} + +static void kfree(void *p) +{ + if (p) + free(p); +} + +static void spin_lock_init(spinlock_t *lock) +{ + int r = pthread_spin_init(lock, 0); + assert(!r); +} + +static void spin_lock(spinlock_t *lock) +{ + int ret = pthre...

...p/llvm/utils/release/rc2/llvm.src/projects/compiler-rt/lib/sanitizer_common/tests/sanitizer_linux_test.cc:230: Failure Value of: ThreadDescriptorSize() Actual: 2288 Expected: (uptr)result Which is: 2304 Scudo :: alignment.cpp Scudo :: double-free.cpp Scudo :: malloc.cpp Scudo :: memalign.cpp Scudo :: mismatch.cpp Scudo :: overflow.cpp Scudo :: preinit.cpp Scudo :: quarantine.cpp Scudo :: realloc.cpp Scudo :: sized-delete.cpp Scudo :: sizes.cpp These ^^ fail to find libatomic when linking. This was added to libstdc++4.8 but is not present in 4.7. &quot...

...ith Samba: First Samba 1.9.18p6 doesn't compile under SCO Unix 3.2v4.2 using native compiler: Linking smbd undefined first referenced symbol in file getpagesize slprintf.o mprotect slprintf.o memalign slprintf.o ld fatal: Symbol referencing errors. No output written to smbd *** Error code 13 Stop. # Also I keep getting errors when linking that it can't find .o files in the subdirectories, when compiling them it creates for instance ubi_dLinkList.o in the parent d...

...: D:\tmp\ffmpeg>ffmpeg -i f:\vi1.avi vo1.avi ffmpeg version 0.4.9-pre1, build 4743, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mp3lame --enable-vorbis --enable-faad --enable-faac - -enable-xvid --enable-mingw32 --enable-a52 --enable-dts --enable-pp --enable-gpl --enable-memalign-hack built on Feb 22 2005 04:58:29, gcc: 3.4.2 (mingw-special) Input #0, avi, from 'f:\vi1.avi': Duration: 00:08:04.8, start: 0.000000, bitrate: 30345 kb/s Stream #0.0: Video: dvvideo, 720x576, 25.00 fps Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s Output #0, avi, to &...

I would like to profile heap usage on a per thread basis in a large application process. To do this I am tracking calls to malloc and free with the attached script. Everything seems to look OK with some simple test programmes, however, when I track the live system, the results suggest that one thread has grown by approximately 1Gb and I would be surprised if this was true because I ran pmap -x on

Hi all: This series tries to switch to use skb array in tun. This is used to eliminate the spinlock contention between producer and consumer. The conversion was straightforward: just introdce a tx skb array and use it instead of sk_receive_queue. A minor issue is to keep the tx_queue_len behaviour, since tun used to use it for the length of sk_receive_queue. This is done through: - add the

Hi all: This series tries to switch to use skb array in tun. This is used to eliminate the spinlock contention between producer and consumer. The conversion was straightforward: just introdce a tx skb array and use it instead of sk_receive_queue. A minor issue is to keep the tx_queue_len behaviour, since tun used to use it for the length of sk_receive_queue. This is done through: - add the