Home
last modified time | relevance | path

Searched refs:overhead (Results 1 – 189 of 189) sorted by relevance

/linux-4.4.14/tools/testing/selftests/powerpc/pmu/
Dcount_instructions.c30 u64 overhead, bool report) in do_count_loop() argument
45 expected = instructions + overhead; in do_count_loop()
53 printf("Looped for %llu instructions, overhead %llu\n", instructions, overhead); in do_count_loop()
76 u64 current, overhead; in determine_overhead() local
80 overhead = events[0].result.value; in determine_overhead()
85 if (current < overhead) { in determine_overhead()
86 printf("Replacing overhead %llu with %llu\n", overhead, current); in determine_overhead()
87 overhead = current; in determine_overhead()
91 return overhead; in determine_overhead()
97 u64 overhead; in test_body() local
[all …]
/linux-4.4.14/tools/testing/selftests/powerpc/pmu/ebb/
Dinstruction_count_test.c26 uint64_t overhead, bool report) in do_count_loop() argument
46 expected = instructions + overhead; in do_count_loop()
51 printf("Looped for %lu instructions, overhead %lu\n", instructions, overhead); in do_count_loop()
72 uint64_t current, overhead; in determine_overhead() local
76 overhead = event->result.value; in determine_overhead()
81 if (current < overhead) { in determine_overhead()
82 printf("Replacing overhead %lu with %lu\n", overhead, current); in determine_overhead()
83 overhead = current; in determine_overhead()
87 return overhead; in determine_overhead()
112 uint64_t overhead; in instruction_count() local
[all …]
/linux-4.4.14/tools/perf/Documentation/
Dcallchain-overhead-calculation.txt3 The overhead can be shown in two columns as 'Children' and 'Self' when
4 perf collects callchains. The 'self' overhead is simply calculated by
7 'self' overhead values should be 100%.
9 The 'children' overhead is calculated by adding all period values of
10 the child functions so that it can show the total overhead of the
15 It might be confusing that the sum of all the 'children' overhead
17 'self' overhead of its child functions. But with this enabled, users
18 can find which function has the most overhead even if samples are
45 in the usual (self-overhead-only) output of perf report:
64 When the --children option is enabled, the 'self' overhead values of
[all …]
Dperf-top.txt119 local_weight, abort, in_tx, transaction, overhead, sample, period.
125 overhead, overhead_sys, overhead_us, overhead_children, sample and period.
140 percentage of the overhead column. See --percentage for more info.
144 percentage of the overhead column. See --percentage for more info.
148 percentage of the overhead column. See --percentage for more info.
172 enabled. See the `overhead calculation' section for more details.
188 Do not show entries which have an overhead under that percent.
192 Determine how to display the overhead percentage of filtered entries.
265 include::callchain-overhead-calculation.txt[]
Dperf-report.txt43 the overhead column. See --percentage for more info.
53 the overhead column. See --percentage for more info.
58 the overhead column. See --percentage for more info.
91 - overhead: Overhead percentage of sample
124 overhead, overhead_sys, overhead_us, overhead_children, sample and period.
181 - graph: use a graph tree, displaying absolute overhead rates. (default)
211 See the `overhead calculation' section for more details.
323 Do not show entries which have an overhead under that percent.
327 Determine how to display the overhead percentage of filtered entries.
359 for other events to reduce the overhead.
[all …]
Dperf-diff.txt105 Determine how to display the overhead percentage of filtered entries.
Dperf-stat.txt140 The overhead percentage could be high in some cases, for instance with small, sub 100ms intervals. …
Dperf-record.txt212 Do not update the buildid cache. This saves some overhead in situations
/linux-4.4.14/drivers/net/fddi/skfp/
Dess.c105 static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead);
124 u_long payload, overhead ; in ess_raf_received_pack() local
262 overhead = ((struct smt_p_3210 *)p)->mib_overhead ; in ess_raf_received_pack()
264 DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ; in ess_raf_received_pack()
269 (void)process_bw_alloc(smc,(long)payload,(long)overhead) ; in ess_raf_received_pack()
312 overhead = ((struct smt_p_3210 *)p)->mib_overhead ; in ess_raf_received_pack()
316 DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ; in ess_raf_received_pack()
321 if(!process_bw_alloc(smc,(long)payload,(long)overhead)) in ess_raf_received_pack()
378 static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead) in process_bw_alloc() argument
429 if (payload > MAX_PAYLOAD || overhead > 5000) { in process_bw_alloc()
[all …]
/linux-4.4.14/drivers/net/wireless/rt2x00/
Drt2x00crypto.c79 unsigned int overhead = 0; in rt2x00crypto_tx_overhead() local
82 return overhead; in rt2x00crypto_tx_overhead()
89 overhead += key->icv_len; in rt2x00crypto_tx_overhead()
92 overhead += key->iv_len; in rt2x00crypto_tx_overhead()
96 overhead += 8; in rt2x00crypto_tx_overhead()
99 return overhead; in rt2x00crypto_tx_overhead()
/linux-4.4.14/net/sctp/
Doutput.c72 packet->size = packet->overhead; in sctp_packet_reset()
112 size_t overhead; in sctp_packet_init() local
122 overhead = sp->pf->af->net_header_len; in sctp_packet_init()
124 overhead = sizeof(struct ipv6hdr); in sctp_packet_init()
126 overhead += sizeof(struct sctphdr); in sctp_packet_init()
127 packet->overhead = overhead; in sctp_packet_init()
409 skb_reserve(nskb, packet->overhead + MAX_HEADER); in sctp_packet_transmit()
708 if (chunk->skb->len + q->out_qlen >= transport->pathmtu - packet->overhead) in sctp_packet_can_append_data()
/linux-4.4.14/fs/ext4/
Dresize.c74 ext4_grpblk_t overhead; in ext4_group_overhead_blocks() local
75 overhead = ext4_bg_num_gdb(sb, group); in ext4_group_overhead_blocks()
77 overhead += 1 + in ext4_group_overhead_blocks()
79 return overhead; in ext4_group_overhead_blocks()
94 unsigned overhead; in verify_group_input() local
106 overhead = ext4_group_overhead_blocks(sb, group); in verify_group_input()
107 metaend = start + overhead; in verify_group_input()
109 input->blocks_count - 2 - overhead - sbi->s_itb_per_group; in verify_group_input()
257 unsigned overhead; in ext4_alloc_group_tables() local
274 overhead = ext4_group_overhead_blocks(sb, src_group); in ext4_alloc_group_tables()
[all …]
Dsuper.c3033 ext4_fsblk_t overhead = 0; in ext4_calculate_overhead() local
3048 overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); in ext4_calculate_overhead()
3057 overhead += blks; in ext4_calculate_overhead()
3064 overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); in ext4_calculate_overhead()
3066 sbi->s_overhead = overhead; in ext4_calculate_overhead()
4799 ext4_fsblk_t overhead = 0, resv_blocks; in ext4_statfs() local
4805 overhead = sbi->s_overhead; in ext4_statfs()
4809 buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); in ext4_statfs()
/linux-4.4.14/Documentation/mmc/
Dmmc-async-req.txt4 How significant is the cache maintenance overhead?
6 pre-fetch makes the cache overhead relatively significant. If the DMA
8 transfer, the DMA preparation overhead would not affect the MMC performance.
64 Pseudocode to handle is_first_req scenario with minimal prepare overhead:
/linux-4.4.14/Documentation/virtual/
Dparavirt_ops.txt22 known that the overhead of indirect call isn't very important.
26 are called frequently and are performance critical. The overhead is
/linux-4.4.14/Documentation/usb/
Dohci.txt16 - improved robustness; bugfixes; and less overhead
26 to overhead in IRQ processing. When interrupt transfers are queued, those
/linux-4.4.14/drivers/net/fddi/skfp/h/
Dsmt.h805 struct smt_p_3210 overhead ; /* current SBA overhead */ member
822 struct smt_p_3210 overhead ; /* current SBA overhead */ member
838 struct smt_p_3210 overhead ; /* current SBA overhead */ member
860 struct smt_p_3210 overhead ; /* current SBA overhead */ member
/linux-4.4.14/include/net/
Dsch_generic.h767 int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; in qdisc_l2t()
779 u16 overhead; member
787 len += r->overhead; in psched_l2t_ns()
810 res->overhead = r->overhead; in psched_ratecfg_getrate()
/linux-4.4.14/net/netlink/
DKconfig9 reduces overhead by avoiding copying data between kernel- and
/linux-4.4.14/fs/fscache/
DKconfig21 The gathering of statistics adds a certain amount of overhead to
38 The generation of this histogram adds a certain amount of overhead to
/linux-4.4.14/Documentation/timers/
Dtimer_stats.txt6 but not used it has almost zero runtime overhead, and a relatively small
7 data structure overhead. Even if collection is enabled runtime all the
Dtimers-howto.txt62 stepped PC!) the overhead of setting up the hrtimers
Dhrtimers.txt29 - the unpredictable [O(N)] overhead of cascading leads to delays which
51 largely expect the timer subsystem to have near-zero overhead.
Dhighres.txt157 calls when an interrupt happens. The overhead would be much larger than the
DNO_HZ.txt43 other than increasing the overhead of switching to and from idle and
/linux-4.4.14/Documentation/netlabel/
Dlsm_interface.txt40 sidestep much of this overhead once a mapping has been established. Once the
47 bypassed as well which should result in a significant reduction in overhead.
/linux-4.4.14/kernel/trace/
DKconfig87 Adds a very slight overhead to tracing when enabled.
147 (the bootup default), then the overhead of the instructions is very
186 (Note that kernel size and overhead increase with this option
210 (Note that kernel size and overhead increase with this option
265 When this is enabled, this adds a little more overhead to the
270 and already adds the overhead (plus a lot more).
290 Either of the above profilers adds a bit of overhead to the system.
296 No branch profiling. Branch profiling adds a bit of overhead.
309 Note: this will add a significant overhead; only turn this
324 This configuration, when enabled, will impose a great overhead
[all …]
Dtrace_functions_graph.c75 { TRACER_OPT(funcgraph-overhead, TRACE_GRAPH_PRINT_OVERHEAD) },
/linux-4.4.14/net/mac80211/
Drc80211_minstrel_ht.c331 nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len); in minstrel_ht_get_tp_avg()
791 unsigned int overhead = 0, overhead_rtscts = 0; in minstrel_calc_retransmit() local
814 overhead = mi->overhead; in minstrel_calc_retransmit()
819 tx_time = ctime + 2 * (overhead + tx_time_data); in minstrel_calc_retransmit()
829 tx_time += ctime + overhead + tx_time_data; in minstrel_calc_retransmit()
1133 mi->overhead = ieee80211_frame_duration(sband->band, 0, 60, 1, 1, 0); in minstrel_ht_update_caps()
1134 mi->overhead += ack_dur; in minstrel_ht_update_caps()
1135 mi->overhead_rtscts = mi->overhead + 2 * ack_dur; in minstrel_ht_update_caps()
Drc80211_minstrel_ht.h84 unsigned int overhead; member
DKconfig110 The overhead in this option is that all the messages
/linux-4.4.14/drivers/gpu/vga/
DKconfig18 multiple GPUS. The overhead for each GPU is very small.
/linux-4.4.14/fs/autofs4/
DKconfig6 overhead in the already-mounted case; this is unlike the BSD
/linux-4.4.14/arch/xtensa/
DKconfig.debug21 values to reduce code size and remove unnecessary overhead from
/linux-4.4.14/Documentation/vm/
Dpage_owner.txt28 boot option, runtime overhead is marginal. If disabled in runtime, it
30 memory overhead. And, page owner inserts just two unlikely branches into
Dbalance9 overhead of page reclaim. This may happen for opportunistic high-order
26 of incurring the overhead of regular zone balancing.
Dcleancache.txt101 in many environments with negligible overhead by improving the
203 overhead is negligible even in worst case workloads. Basically
204 cleancache replaces I/O with memory-copy-CPU-overhead; on older
Dfrontswap.txt121 what's the space/time overhead of frontswap?
124 nothingness and the only overhead is a few extra bytes per swapon'ed
130 CPU overhead is still negligible -- and since every frontswap fail
Dslub.txt92 in order to reduce overhead and increase cache hotness of objects.
114 list_lock once in a while to deal with partial slabs. That overhead is
Dnuma143 attached to memoryless nodes would always incur the fallback path overhead
Dtranshuge.txt204 reading it frequently will incur overhead.
239 monitor this overhead.
Dnuma_memory_policy.txt358 on different NUMA nodes. This extra overhead can be avoided by always
/linux-4.4.14/Documentation/networking/
Dnetdevices.txt26 include any link layer protocol overhead. Upper layer protocols must
28 than the mtu. The MTU does not include link layer header overhead, so
Dbatman-adv.txt16 duce the overhead to a minimum. It does not depend on any (other)
101 sive to topology changes, but will also increase the overhead.
Ddm9000.txt140 To reduce the overhead for the internal PHY, there is now the option
Dnetlink_mmap.txt9 overhead of unicast receive and transmit operations. Some netlink subsystems
Deql.txt364 289284 bytes of data. If there were no overhead (packet headers,
Dfilter.txt582 minimal performance overhead over two steps, that is, C -> eBPF -> native code.
661 - Introduces bpf_call insn and register passing convention for zero overhead
Dppp_generic.txt187 transmitted as single fragments, thus reducing the overhead of
Dip-sysctl.txt189 Count buffering overhead as bytes/2^tcp_adv_win_scale
1598 address in this case adds little overhead and eliminates a potential
Drxrpc.txt689 (4) Avoid the overhead of using the recvmsg() call. RxRPC messages can be
/linux-4.4.14/Documentation/RCU/
DwhatisRCU.txt107 but RCU provides implicit low-overhead communication between readers
189 synchronize_rcu()'s overhead must also be quite small.
261 unnecessary overhead on Alpha CPUs.
318 order to amortize their overhead over many uses of the corresponding APIs.
559 familiar locking primitives. Its overhead makes it a non-starter for
646 read-side overhead is precisely zero, at least on non-Alpha CPUs.
671 overhead is -negative-.
977 overhead is -negative-.
989 One can argue that the overhead of RCU in this
992 the overhead of RCU is merely zero, and that replacing
[all …]
DarrayRCU.txt41 this situation, which would also have minimal read-side overhead as long
Dchecklist.txt14 tool for the job. Yes, RCU does reduce read-side overhead by
15 increasing write-side overhead, which is exactly why normal uses
387 Second, grace-period-detection overhead is amortized only
DRTFP.txt14 overhead.
45 tracking imposes significant read-side overhead, which is undesirable
117 impose significant read-side overhead in the form of memory barriers.
266 completely unacceptable overhead in systems with large numbers
299 completely unacceptable overhead in systems with large numbers
391 avoid synchronization overhead by using possibly-stale data.
2382 RCU updates, RCU grace-period batching, update overhead,
2663 RCU updates, RCU grace-period batching, update overhead,
Drcubarrier.txt7 very low-overhead readers that are immune to deadlock, priority inversion,
Dstallwarn.txt32 some overhead. Therefore, under CONFIG_PROVE_RCU, the
/linux-4.4.14/drivers/staging/slicoss/
DTODO24 - wasted overhead of extra stats
/linux-4.4.14/arch/x86/xen/
DKconfig52 Enabling this option may incur a significant performance overhead.
/linux-4.4.14/drivers/vhost/
DKconfig47 adds some overhead, it is disabled by default.
/linux-4.4.14/fs/cachefiles/
DKconfig32 The generation of this histogram adds a certain amount of overhead to
/linux-4.4.14/fs/squashfs/
DKconfig9 are very small and all blocks are packed to minimise data overhead.
17 embedded systems where low overhead is needed. Further information
161 memory overhead.
/linux-4.4.14/fs/jfs/
DKconfig43 results in very little overhead.
/linux-4.4.14/Documentation/filesystems/
Dsquashfs.txt7 minimise data overhead. Block sizes greater than 4K are supported up to a
12 block device/memory systems (e.g. embedded systems) where low overhead is
156 This scheme has the advantage that it doesn't require extra memory overhead
227 To reduce overhead in inodes, rather than storing the on-disk
Df2fs.txt14 tree and high cleaning overhead.
243 reduce the space overhead. The default value is 0.
548 overhead under high utilization. Contrarily, the threaded log scheme suffers
Dromfs.txt49 name). The maximum overhead for any non-empty file is the header, and
Dautofs4-mount-control.txt138 often it can introduce significant overhead when there are many entries
156 the mount table which has proved to be a big overhead for users with
Dlogfs.txt110 the GC overhead later. Each type of distinc life expectency (vim) can
Dgfs2-glocks.txt125 try and reduce the overhead of gathering them. They are also
Dxfs-self-describing-metadata.txt87 little overhead. Adding support for larger integrity fields and/or algorithms
Dext2.txt82 less wasted space per file, but require slightly more accounting overhead,
Dpath-lookup.txt134 hlist-->| N-+-------->| N-+-> impose a measurable performance overhead
Drelay.txt62 overhead mechanism for conveying kernel data to userspace. While the
Dext4.txt84 * extent format reduces metadata overhead (RAM, IO for access, transactions)
Dxfs-delayed-logging-design.txt489 transaction. While some of this is fixed overhead, much of it is dependent on
/linux-4.4.14/include/uapi/linux/
Dpkt_sched.h87 unsigned short overhead; member
99 int overhead; member
/linux-4.4.14/arch/powerpc/kvm/
DKconfig122 kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40
136 The overhead is relatively small, however it is not recommended for
/linux-4.4.14/drivers/usb/host/
Dxhci.c2085 if (interval_bw->overhead[LS_OVERHEAD_TYPE]) in xhci_get_largest_overhead()
2087 if (interval_bw->overhead[FS_OVERHEAD_TYPE]) in xhci_get_largest_overhead()
2193 unsigned int overhead = 0; in xhci_check_bw_table() local
2281 if (interval_overhead > overhead) in xhci_check_bw_table()
2282 overhead = interval_overhead; in xhci_check_bw_table()
2290 bw_added = packets_transmitted * (overhead + packet_size); in xhci_check_bw_table()
2301 overhead = 0; in xhci_check_bw_table()
2309 overhead = interval_overhead; in xhci_check_bw_table()
2329 bw_used += overhead + packet_size; in xhci_check_bw_table()
2428 interval_bw->overhead[LS_OVERHEAD_TYPE] -= 1; in xhci_drop_ep_from_interval_table()
[all …]
Dxhci.h959 unsigned int overhead[3]; member
/linux-4.4.14/kernel/
DKconfig.preempt49 and a slight runtime overhead to kernel code.
/linux-4.4.14/arch/cris/arch-v10/lib/
Dchecksum.S24 ;; this overhead is why we have a check above for breakeven length
Dchecksumcopy.S28 ;; this overhead is why we have a check above for breakeven length
/linux-4.4.14/net/sched/
Dsch_tbf.c137 if (len > r->overhead) in psched_ns_t2l()
138 len -= r->overhead; in psched_ns_t2l()
Dsch_generic.c960 r->overhead = conf->overhead; in psched_ratecfg_precompute()
Dsch_api.c546 pkt_len = skb->len + stab->szopts.overhead; in __qdisc_calculate_pkt_len()
/linux-4.4.14/Documentation/block/
Dnull_blk.txt49 1: Soft-irq. Uses IPI to complete IOs across CPU nodes. Simulates the overhead
Dbiodoc.txt104 generic processing an overhead, while for less capable devices the
403 through layered drivers (lvm, md, evms), with minimal overhead.
747 To minimize struct request and queue overhead, the tag helpers utilize some
/linux-4.4.14/net/batman-adv/
DKconfig59 reduce the air overhead while improving the reliability of
/linux-4.4.14/Documentation/scsi/
Dadvansys.txt70 problems. Enabling assertions will add a small overhead to the
78 of the driver execution image and add overhead to the execution of
139 size of the driver execution image and add minor overhead to
DFlashPoint.txt37 automation technology, which minimizes SCSI command overhead and reduces
DChangeLog.ncr53c8xx454 supported without script processor and PCI traffic overhead.
/linux-4.4.14/fs/ext2/
Dsuper.c1381 unsigned long i, overhead = 0; in ext2_statfs() local
1394 overhead = le32_to_cpu(es->s_first_data_block); in ext2_statfs()
1402 overhead += ext2_bg_has_super(sb, i) + in ext2_statfs()
1409 overhead += (sbi->s_groups_count * in ext2_statfs()
1411 sbi->s_overhead_last = overhead; in ext2_statfs()
/linux-4.4.14/Documentation/arm/
Dkernel_user_helpers.txt20 code, the overhead of a VDSO indirect far call would add a measurable
21 overhead to such minimalistic operations.
/linux-4.4.14/drivers/net/wireless/brcm80211/
DKconfig78 issues. This option adds a small amount of overhead when tracing
/linux-4.4.14/Documentation/
Drobust-futexes.txt76 This huge overhead forced the creation of CONFIG_FUTEX_ROBUST so that
77 normal kernels can turn it off, but worse than that: the overhead makes
181 So there is virtually zero overhead for tasks not using robust futexes,
Dstatic-keys.txt51 Although the overhead of this check is small, it increases when the memory
54 in the kernel this overhead may become more of an issue. In addition,
Dlockup-watchdogs.txt64 between fast response to lockups and detection overhead.
Dkprobes.txt172 sysctl(8)), Kprobes tries to reduce probe-hit overhead by using a jump
629 the entry to that function adds essentially no overhead.
631 Here are sample overhead figures (in usec) for different architectures.
647 process. Here are sample overhead figures (in usec) for x86 architectures.
Diostats.txt39 you'll avoid the overhead of 50, 100, or 500 or more opens/closes with
Dvfio.txt20 field, also benefit from low-overhead, direct device access from
75 reducing the overhead both to the platform (reduced TLB thrashing,
Dthis_cpu_ops.txt22 without the typical synchronization overhead, but still provide some
Dkernel-per-CPU-kthreads.txt206 reduces or even eliminates vmstat overhead for some
Dworkqueue.txt266 Ignoring all other tasks, works and processing overhead, and assuming
Dbcache.txt443 metadata overhead. Average is the average priority of cache buckets.
Ddma-buf-sharing.txt308 For some cases the overhead of kmap can be too high, a vmap interface
Dkernel-parameters.txt599 cut the overhead, others just disable the usage. So
3154 CPUs. Larger numbers reduces the wakeup overhead
3156 that same overhead on each group's leader.
3528 of objects the smaller the overhead of tracking slabs
3835 can add overhead.
4138 overhead.
Dkmemcheck.txt125 time overhead is not incurred, and the kernel will be almost as fast
DCodingStyle912 overhead. However, this approach still allows the C compiler to see the code
Dmemory-barriers.txt1416 tmp onto the stack. The overhead of this saving and later restoring
1664 barriers unnecessarily impose overhead on UP systems. They may, however, be
/linux-4.4.14/arch/microblaze/
DKconfig235 will reduce software overhead at each page boundary, allow
238 overhead. However the utilization of memory will increase.
/linux-4.4.14/lib/
DKconfig.kmemcheck25 kmemcheck=0, the large memory and CPU overhead is not incurred.
DKconfig.debug510 feature will introduce an overhead to memory
570 can cause significant overhead, so only enable it in non-production
707 The overhead should be minimal. A periodic hrtimer runs to
774 feature has negligible overhead.
851 that can help debug the scheduler. The runtime overhead of this
868 application, you can say N to avoid the very slight overhead
881 is examined. The runtime overhead introduced is minimal.
958 Note that this feature can introduce significant overhead, so
1055 of more runtime overhead.
DKconfig414 # This actually supports modular compilation, but the module overhead
/linux-4.4.14/Documentation/ide/
Dide-tape.txt60 driven and thus has much less CPU overhead.
DChangeLog.ide-tape.1995-2002119 * reduce the CPU's overhead when accessing the device,
139 * Reduced CPU overhead a bit by eliminating internal
/linux-4.4.14/tools/perf/ui/
Dhist.c357 HPP_PERCENT_FNS(overhead, period) in HPP_PERCENT_FNS() argument
410 HPP__COLOR_PRINT_FNS("Overhead", overhead),
/linux-4.4.14/fs/f2fs/
DKconfig8 of wandering tree and high cleaning overhead.
/linux-4.4.14/arch/sh/
DKconfig.debug27 drops below a certain limit. Saying Y here will add overhead to
/linux-4.4.14/Documentation/accounting/
Dtaskstats.txt152 overhead. If only a few fields need to be added, then 1. is the preferable
153 path since the kernel and userspace don't need to incur the overhead of
/linux-4.4.14/fs/ntfs/
DKconfig45 overhead, but enabling debug messages results in very significant
/linux-4.4.14/net/irda/
DKconfig42 (watch, beacon) without the overhead of the IrDA protocol (no handshaking,
/linux-4.4.14/tools/perf/ui/gtk/
Dhists.c66 __HPP_COLOR_PERCENT_FN(overhead, period) in __HPP_COLOR_PERCENT_FN() argument
/linux-4.4.14/Documentation/locking/
Drt-mutex.txt41 locking overhead when locking an uncontended mutex or unlocking a mutex
Dww-mutex-design.txt308 ww_mutex currently encapsulates a struct mutex, this means no extra overhead for
315 would add overhead to all cases where normal mutexes are used, and
/linux-4.4.14/arch/blackfin/
DKconfig.debug101 Otherwise, there is no extra overhead.
126 Because zero-overhead Hardware loops are not recorded in the trace buffer,
DKconfig938 bool "ins[bwl] low overhead, higher interrupt latency"
954 I/O space. This option controls which the overhead/latency of
957 (higher overhead, but lower interrupt latency)
959 (low overhead, but longer interrupt latency)
/linux-4.4.14/fs/nilfs2/
Dsuper.c620 unsigned long overhead; in nilfs_statfs() local
642 overhead = 0; in nilfs_statfs()
670 buf->f_blocks = blocks - overhead; in nilfs_statfs()
/linux-4.4.14/Documentation/infiniband/
Dipoib.txt69 the overhead incurred by handling interrupts. The main code path of
/linux-4.4.14/Documentation/leds/
Dleds-class.txt50 overhead, I suggest these become part of the device name. The naming scheme
/linux-4.4.14/arch/powerpc/platforms/8xx/
DKconfig137 circumstances. This workaround adds some overhead (a TLB miss
/linux-4.4.14/Documentation/tpm/
Dxen-tpmfront.txt21 mini-os to reduce memory and processor overhead.
/linux-4.4.14/include/net/sctp/
Dstructs.h697 size_t overhead; member
730 return packet->size == packet->overhead; in sctp_packet_empty()
/linux-4.4.14/tools/virtio/virtio-trace/
DREADME5 overhead. Trace agent has the following functions:
/linux-4.4.14/Documentation/ABI/obsolete/
Dsysfs-block-zram90 overhead, allocated for this disk. So, allocator space
/linux-4.4.14/Documentation/sound/alsa/
Dserial-u16550.txt60 to send the data to no ports. M/B mode has extra overhead to select the MIDI
DHD-Audio.txt104 very slight CPU overhead, but you'd unlikely notice it.
/linux-4.4.14/drivers/net/wireless/iwlwifi/
DKconfig155 (though rather small) overhead.
/linux-4.4.14/arch/powerpc/platforms/ps3/
DKconfig56 overhead and also slightly increases kernel memory usage. The
/linux-4.4.14/Documentation/ia64/
Dfsys.txt110 Fsyscall handlers can execute with very little overhead, but with that
157 higher overhead. For example, if an fsyscall-handler could benefit
/linux-4.4.14/arch/powerpc/
DKconfig540 will reduce software overhead at each page boundary, allow
543 overhead. However the utilization of memory will increase.
554 reduced software overhead and larger internal fragmentation.
633 overhead in some places. If unsure say N here.
DKconfig.debug50 This option will add a small amount of overhead to all hypervisor
/linux-4.4.14/drivers/tty/
Dn_gsm.c863 int overhead = 0; in gsm_dlci_data_output_framed() local
867 overhead = 1; in gsm_dlci_data_output_framed()
876 len = dlci->skb->len + overhead; in gsm_dlci_data_output_framed()
890 size = len + overhead; in gsm_dlci_data_output_framed()
/linux-4.4.14/Documentation/trace/
Dftrace.txt92 writing to the ring buffer, the tracing overhead may
188 in with practically no overhead in performance. This also
239 the "save regs" attribute (thus even more overhead), a 'R'
869 overhead, and if you only care about pids, and not the
904 functions. This keeps the overhead of the tracer down
1058 enabling function tracing, we incur an added overhead. This
1059 overhead may extend the latency times. But nevertheless, this
1946 - The overhead field precedes the duration field in case of
1949 hide: echo nofuncgraph-overhead > trace_options
1950 show: echo funcgraph-overhead > trace_options
[all …]
Dtracepoint-analysis.txt230 period is quite high to minimise overhead but the information collected can be
/linux-4.4.14/arch/m68k/ifpsp060/
Dilsp.doc41 instructions, a program can avoid the overhead associated with
Dfplsp.doc42 instructions, a program can avoid the overhead associated
/linux-4.4.14/Documentation/ABI/testing/
Dsysfs-block-zram121 overhead, allocated for this disk. So, allocator space
Dsysfs-kernel-slab296 remain on a node's partial list to avoid the overhead of
/linux-4.4.14/kernel/time/
DKconfig111 This is implemented at the expense of some overhead in user <-> kernel
/linux-4.4.14/arch/sparc/
DKconfig323 when dealing with SPARC cpus at a cost of slightly increased overhead
333 increased overhead in some places. If unsure say N here.
/linux-4.4.14/drivers/net/usb/
Dsmsc95xx.c1832 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; in smsc95xx_tx_fixup() local
1838 if (skb_headroom(skb) < overhead) { in smsc95xx_tx_fixup()
1840 overhead, 0, flags); in smsc95xx_tx_fixup()
/linux-4.4.14/arch/arm64/
DKconfig484 increased overhead in some places. If unsure say N here.
490 MultiThreading at a cost of slightly increased overhead in some
701 atomic routines. This incurs a small overhead on CPUs that do
/linux-4.4.14/arch/sh/mm/
DKconfig236 increased overhead in some places. If unsure say N here.
/linux-4.4.14/fs/cramfs/
DREADME116 code simplicity and little CPU overhead even on big-endian machines.
/linux-4.4.14/Documentation/driver-model/
Ddevres.txt228 Memory space overhead on ahci controller with two ports is between 300
/linux-4.4.14/Documentation/fb/
Dudlfb.txt147 hardware. Includes compression and protocol overhead
/linux-4.4.14/arch/parisc/
DKconfig223 64KB For best performance, might give more overhead.
/linux-4.4.14/Documentation/blockdev/
Dzram.txt79 implemented as a special case by lock overhead issue and does not support
/linux-4.4.14/fs/affs/
DChanges298 overhead slows down opening, but this is hardly
/linux-4.4.14/Documentation/s390/
Dcds.txt346 next it can reduce I/O processing overhead by chaining a NoOp I/O command
354 In order to minimize I/O overhead, a device driver should use the
/linux-4.4.14/arch/alpha/
DKconfig506 that reduce the overhead of system emulation.
671 minimizes latency, whereas a low frequency minimizes overhead of
/linux-4.4.14/arch/x86/
DKconfig645 at the expense of slightly more scheduling overhead.
711 may incur significant overhead.
881 cost of slightly increased overhead in some places. If unsure say
891 increased overhead in some places. If unsure say N here.
1300 has the cost of more pagetable lookup overhead, and also
1480 almost no overhead, as it reserves a relatively small amount
1676 will increase the kernel memory overhead of each
2133 Enabling this feature adds a small amount of overhead to
DKconfig.debug387 This debugging adds some small amount of runtime overhead
/linux-4.4.14/Documentation/sysctl/
Dkernel.txt467 The unmapping of pages and trapping faults incur additional overhead that
470 feature should be disabled. Otherwise, if the system overhead from the
494 Higher scan rates incur higher system overhead as page faults must be
/linux-4.4.14/Documentation/isdn/
DREADME.concap222 lines). For such slow lines, the overhead is probably negligible.
/linux-4.4.14/Documentation/hwmon/
Dlm90268 to use two SMBus transaction for reads, this overhead jumps to +50%. Worse,
/linux-4.4.14/kernel/power/
DKconfig297 lower power usage at the cost of small performance overhead.
/linux-4.4.14/Documentation/cpu-freq/
Dgovernors.txt165 speed due to high load. This improves performance by reducing the overhead
/linux-4.4.14/Documentation/arm64/
Dbooting.txt221 to reduce the overhead of the busy-loop and a sev will be issued by
/linux-4.4.14/drivers/mtd/
DKconfig195 from an MTD device, without the overhead (and danger) of the caching
/linux-4.4.14/net/
DKconfig105 overhead in the transmit and receive paths.
/linux-4.4.14/scripts/
Dspelling.txt687 overhread||overhead
/linux-4.4.14/arch/
DKconfig70 This technique lowers overhead and stress on the branch prediction
/linux-4.4.14/arch/arm/crypto/
Dsha1-armv4-large.S31 @ performance is affected by prologue and epilogue overhead,
Daesbs-core.S_shipped38 @ results keep in mind key schedule conversion overhead (see
/linux-4.4.14/fs/befs/
DChangeLog19 * Added Sergey S. Kostyliov's patch to eliminate memcpy() overhead
/linux-4.4.14/arch/ia64/
DKconfig360 overhead in some places. If unsure say N here.
/linux-4.4.14/init/
DKconfig313 Enable low-overhead system-call auditing infrastructure that
375 overhead.
564 Say N otherwise, this option brings an overhead that you
1026 there will be no overhead from this. Even when you set this config=y,
/linux-4.4.14/arch/x86/math-emu/
DREADME167 affected by the FPU instruction trap overhead.
/linux-4.4.14/arch/arm/
DKconfig1369 increased overhead in some places. If unsure say N here.
1376 MultiThreading at a cost of slightly increased overhead in some
1631 overhead to all syscalls and produces a slightly larger kernel.
/linux-4.4.14/mm/
DKconfig40 can have degraded performance from the extra overhead that
/linux-4.4.14/drivers/mmc/host/
DKconfig490 disadvantage of being relatively high overhead, but a compensating
/linux-4.4.14/tools/perf/ui/browsers/
Dhists.c730 __HPP_COLOR_PERCENT_FN(overhead, period) in __HPP_COLOR_PERCENT_FN() argument
/linux-4.4.14/Documentation/virtual/kvm/
Dtimekeeping.txt270 extra overhead incurred from extra reads of memory-mapped I/O or additional
Dapi.txt3354 avoid some system call overhead if userspace has to handle the exit.
/linux-4.4.14/Documentation/cgroups/
Dmemory.txt407 Performance test is also important. To see pure memory controller's overhead,
Dcpusets.txt406 system overhead on those CPUs, including avoiding task load
/linux-4.4.14/Documentation/security/
DSmack.txt313 of popular Linux distributions. The administrative overhead required to
/linux-4.4.14/arch/mips/
DKconfig2182 increased overhead in some places. If unsure say N here.