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This is part of my program. I am getting an error, that I cannot figure out, any help would very much appreciated, thanks. # subset variables arc <- arc[,c("SNAP", "code", "ncode", "var", "n_total")] Error in `[.data.frame`(arc, , c("SNAP", "code", "ncode", : undefined columns selected arc$N_eff <- with(arc, ifelse(var > 1, n_total, var * n_total)) Error in storage.mode(test) <- "logical" : obje...

...won't get the new key state. So ResyncKeyState() will > * ensure that if the app is looping on GetKeyState(), it'll get the > * right key state. > */ Code: #include <windows.h> #include <cstdio> LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) { if(nCode == HC_ACTION && wParam == WM_KEYDOWN) { KBDLLHOOKSTRUCT* key = (KBDLLHOOKSTRUCT*)lParam; GetKeyState(0); BYTE keyState[256]; GetKeyboardState(keyState); WORD chars; if(ToAscii(key->vkCode,...

...locking queuing which has a higher overhead. */ +#define _QSPINLOCK_WAIT_SHIFT 8 /* Waiting bit position */ +#define _QSPINLOCK_WAITING (1 << _QSPINLOCK_WAIT_SHIFT) +/* Masks for lock & wait bits */ +#define _QSPINLOCK_LWMASK (_QSPINLOCK_WAITING | _QSPINLOCK_LOCKED) + #define queue_encode_qcode(cpu, idx) (((cpu) + 1) << 2 | (idx)) +#define queue_get_qcode(lock) (atomic_read(&(lock)->qlcode) >> _QCODE_OFFSET) + +#define queue_spin_trylock_quick queue_spin_trylock_quick +/** + * queue_spin_trylock_quick - quick spinning on the queue spinlock + * @lock : Pointer to q...

v6->v7: - Remove an atomic operation from the 2-task contending code - Shorten the names of some macros - Make the queue waiter to attempt to steal lock when unfair lock is enabled. - Remove lock holder kick from the PV code and fix a race condition - Run the unfair lock & PV code on overcommitted KVM guests to collect performance data. v5->v6: - Change the optimized

v6->v7: - Remove an atomic operation from the 2-task contending code - Shorten the names of some macros - Make the queue waiter to attempt to steal lock when unfair lock is enabled. - Remove lock holder kick from the PV code and fix a race condition - Run the unfair lock & PV code on overcommitted KVM guests to collect performance data. v5->v6: - Change the optimized

...3658 7696 6 4942 4434 9876 7 6304 5176 11901 8 7736 5955 14551 Below is the code that I used: static inline u32 queue_code_xchg(struct qspinlock *lock, u32 *ocode, u32 ncode) { while (true) { u32 qlcode = atomic_read(&lock->qlcode); if (qlcode == 0) { /* * Try to get the lock */ if (atomic_cmpxchg(&lock->qlcode,...

...ing, a CPU can only be contending in one spinlock at any one time. Of course, interrupt handler can try to acquire one spinlock while the interrupted user process is in the process of getting another spinlock. By allocating a set of per-cpu queue nodes and used them to form a waiting queue, we can encode the queue node address into a much smaller 16-bit size. Together with the 1-byte lock bit, this queue spinlock implementation will only need 4 bytes to hold all the information that it needs. The current queue node address encoding of the 4-byte word is as follows: Bits 0-7 : the locked byte Bits...

v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit to enable/disable unfair lock. - Reduce unfair lock slowpath lock stealing frequency depending on its distance from the queue head. - Add performance data for IvyBridge-EX CPU.

v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit to enable/disable unfair lock. - Reduce unfair lock slowpath lock stealing frequency depending on its distance from the queue head. - Add performance data for IvyBridge-EX CPU.

N.B. Sorry for the duplicate. This patch series were resent as the original one was rejected by the vger.kernel.org list server due to long header. There is no change in content. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit

N.B. Sorry for the duplicate. This patch series were resent as the original one was rejected by the vger.kernel.org list server due to long header. There is no change in content. v7->v8: - Remove one unneeded atomic operation from the slowpath, thus improving performance. - Simplify some of the codes and add more comments. - Test for X86_FEATURE_HYPERVISOR CPU feature bit

v5->v6: - Change the optimized 2-task contending code to make it fairer at the expense of a bit of performance. - Add a patch to support unfair queue spinlock for Xen. - Modify the PV qspinlock code to follow what was done in the PV ticketlock. - Add performance data for the unfair lock as well as the PV support code. v4->v5: - Move the optimized 2-task contending code to the

v5->v6: - Change the optimized 2-task contending code to make it fairer at the expense of a bit of performance. - Add a patch to support unfair queue spinlock for Xen. - Modify the PV qspinlock code to follow what was done in the PV ticketlock. - Add performance data for the unfair lock as well as the PV support code. v4->v5: - Move the optimized 2-task contending code to the

...elow is the (rather messy) qspinlock slow path code (the only thing that really differs between our versions. I'll try and slot your version in tomorrow. --- /* * Exactly fills one cacheline on 64bit. */ static DEFINE_PER_CPU_ALIGNED(struct mcs_spinlock, mcs_nodes[4]); static inline u32 encode_tail(int cpu, int idx) { u32 code; code = (cpu + 1) << _Q_TAIL_CPU_OFFSET; code |= idx << _Q_TAIL_IDX_OFFSET; /* assume < 4 */ return code; } static inline struct mcs_spinlock *decode_tail(u32 code) { int cpu = (code >> _Q_TAIL_CPU_OFFSET) - 1; int idx = (code...

...elow is the (rather messy) qspinlock slow path code (the only thing that really differs between our versions. I'll try and slot your version in tomorrow. --- /* * Exactly fills one cacheline on 64bit. */ static DEFINE_PER_CPU_ALIGNED(struct mcs_spinlock, mcs_nodes[4]); static inline u32 encode_tail(int cpu, int idx) { u32 code; code = (cpu + 1) << _Q_TAIL_CPU_OFFSET; code |= idx << _Q_TAIL_IDX_OFFSET; /* assume < 4 */ return code; } static inline struct mcs_spinlock *decode_tail(u32 code) { int cpu = (code >> _Q_TAIL_CPU_OFFSET) - 1; int idx = (code...

...printf("Press keys, end with Ctrl-C...\n"); for (;;) { --- baseline-syslinux/./syslinux-3.11/com32/libutil/get_key.c 2006-05-25 14:03:31.000000000 -0700 +++ fixed-syslinux/./syslinux-3.11/com32/libutil/get_key.c 2006-05-25 14:03:01.000000000 -0700 @@ -116,7 +116,7 @@ }; #define NCODES ((int)(sizeof keycodes/sizeof(struct keycode))) -#define KEY_TIMEOUT ((CLK_TCK+9)/10) +#define KEY_TIMEOUT ((CLOCKS_PER_SEC+9)/10) int get_key(FILE *f, clock_t timeout) { --- baseline-syslinux/./syslinux-3.11/com32/include/sys/times.h 2006-05-25 14:03:31.000000000 -0700 +++ fixed-syslinux/./...

...run). I was able to successfully build libogg, libvorbis and libvorbis examples using this tool and generate valid JavaScript (hopefully working as intended also...). In JavaScript, once I obtain the left and right channel audio data (using W3C web audio api) I pass this data into the JavaScript encoder as command line arguments. This data is then read, each string converted to a float, and the vorbis_analysis_buffer is filled with this "parsed" data. Similarly, I pass the quality as an argument and run vorbis_encode_init_vbr accordingly. One last thing that I pass in is a "state&...

...if (copy) { @@ -852,6 +863,7 @@ int flush; Tracev((stderr, "inflate: table sizes ok\n")); state->have = 0; state->mode = LENLENS; + /* fallthrough */ case LENLENS: while (state->have < state->ncode) { NEEDBITS(3); @@ -873,6 +885,7 @@ int flush; Tracev((stderr, "inflate: code lengths ok\n")); state->have = 0; state->mode = CODELENS; + /* fallthrough */ case CODELENS: while (state->have &l...

From: Matt Fleming <matt.fleming at linux.intel.com> These patches are based on the elflink branch. This set of patches is my attempt at moving the command-line interface functionality out of the core and into an ELF module to reduce the size of the core. The most interesting patch is [PATCH 4/4] which moves the cli code out of core/elflink and into com32/elflink/modules. [PATCH 4/4] is

From: Matt Fleming <matt.fleming at linux.intel.com> This is a series of patches that, * shrink the core by moving things into an ldlinux ELF module * begin wiring up some of the C versions of various functions The core now only contains essential code and loads the ldlinux module to do everything else, like providing a command line interface and loading kernels. The config file parsing