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/linux/Documentation/ABI/testing/
H A Dsysfs-bus-pci-devices-aer_stats2 --------------------------
5 statistical counters indicate the errors "as seen/reported by the device".
7 counters may increment at its link partner (e.g. root port) because the
9 problematic endpoint itself (which may report all counters as 0 as it never
15 Contact: linux-pci@vger.kernel.org, rajatja@google.com
28 Advisory Non-Fatal 0
36 Contact: linux-pci@vger.kernel.org, rajatja@google.com
46 Surprise Down Error 0
66 Contact: linux-pci@vger.kernel.org, rajatja@google.com
76 Surprise Down Error 0
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/linux/tools/testing/selftests/net/netfilter/
H A Dnft_flowtable.sh2 # SPDX-License-Identifier: GPL-2.0
7 # Originator (MTU 9000) <-Router1-> MTU 1500 <-Router2-> Responder (MTU 2000)
14 # nft_flowtable.sh -o8000 -l1500 -r2000
26 log_netns=$(sysctl -n net.netfilter.nf_log_all_netns)
28 checktool "nft --version" "run test without nft tool"
29 checktool "socat -h" "run test without socat"
39 rm -f "$nsin" "$ns1out" "$ns2out"
41 [ "$log_netns" -eq 0 ] && sysctl -q net.netfilter.nf_log_all_netns="$log_netns"
46 sysctl -q net.netfilter.nf_log_all_netns=1
54 ip -net "$nsr1" link set "$dev" up
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/linux/tools/perf/Documentation/
H A Dperf-stat.txt1 perf-stat(1)
5 ----
6 perf-stat - Run a command and gather performance counter statistics
9 --------
11 'perf stat' [-e <EVENT> | --event=EVENT] [-a] <command>
12 'perf stat' [-e <EVENT> | --event=EVENT] [-a] \-- <command> [<options>]
13 'perf stat' [-e <EVENT> | --event=EVENT] [-a] record [-o file] \-- <command> [<options>]
14 'perf stat' report [-i file]
17 -----------
23 -------
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H A Dtopdown.txt2 ---------------------
11 perf stat --topdown implements this using available metrics that vary
14 % perf stat -a --topdown -I1000
28 fixed counters and do not require generic counters. This allows
53 metric event, and allow user programs to read the performance counters.
84 int slots_fd = perf_event_open(&slots, 0, -1, -1, 0);
104 int metrics_fd = perf_event_open(&metrics, 0, -1, slots_fd, 0);
123 #define RDPMC_FIXED (1 << 30) /* return fixed counters */
124 #define RDPMC_METRIC (1 << 29) /* return metric counters */
147 _rdpmc calls should not be mixed with reading the metrics and slots counters
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/linux/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/
H A Dcounters.rst1 .. SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
5 Ethtool counters
13 - `Overview`_
14 - `Groups`_
15 - `Types`_
16 - `Descriptions`_
22 addition, each group of counters may have different counter types.
27 ----------------------------------------
29 ---------------------------------------- ---------------------------------------- |
32 | ------------------- --------------- | | ------------------- --------------- | |
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/linux/tools/testing/selftests/net/forwarding/
H A Dvxlan_bridge_1d.sh2 # SPDX-License-Identifier: GPL-2.0
4 # +--------------------+ +----------------------+
8 # +----|---------------+ +--|-------------------+
10 # +----|--------------------------------------------------|-------------------+
12 # | +--|--------------------------------------------------|-----------------+ |
19 # | +-----------------------------------------------------------------------+ |
26 # +----|----------------------------------------------------------------------+
28 # +----|--------------------------------------------------------+
37 # +----|---------------------------------------|----------------+
39 # +----|------------------------------+ +----|------------------------------+
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H A Dvxlan_bridge_1q.sh2 # SPDX-License-Identifier: GPL-2.0
4 # +-----------------------+ +------------------------+
13 # +----|------------------+ +----|-------------------+
15 # +----|--------------------------------------------------|-------------------+
17 # | +--|--------------------------------------------------|-----------------+ |
27 # | +-----------------------------------------------------------------------+ |
34 # +----|----------------------------------------------------------------------+
36 # +----|--------------------------------------------------------+
45 # +----|---------------------------------------|----------------+
47 # +----|------------------------------+ +----|------------------------------+
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H A Dvxlan_bridge_1q_ipv6.sh2 # SPDX-License-Identifier: GPL-2.0
4 # +-----------------------+ +------------------------+
15 # +----|------------------+ +----|-------------------+
17 # +----|--------------------------------------------------|-------------------+
19 # | +--|--------------------------------------------------|-----------------+ |
31 # | +-----------------------------------------------------------------------+ |
38 # +----|----------------------------------------------------------------------+
40 # +----|----------------------------------------------------------+
49 # +----|---------------------------------------|------------------+
51 # +----|--------------------------------+ +----|-------------------------------+
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H A Dvxlan_bridge_1d_ipv6.sh2 # SPDX-License-Identifier: GPL-2.0
4 # +-----------------------+ +------------------------+
9 # +----|------------------+ +----|-------------------+
11 # +----|--------------------------------------------------|-------------------+
13 # | +--|--------------------------------------------------|-----------------+ |
20 # | +-----------------------------------------------------------------------+ |
27 # +----|----------------------------------------------------------------------+
29 # +----|----------------------------------------------------------+
38 # +----|---------------------------------------|------------------+
40 # +----|--------------------------------+ +----|-------------------------------+
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/linux/arch/arm64/kernel/
H A Dtopology.c61 cpu_topology[cpu].thread_id = -1; in parse_acpi_topology()
107 pr_debug("CPU%d: counters are not supported.\n", cpu); in freq_counters_valid()
113 pr_debug("CPU%d: cycle counters are not enabled.\n", cpu); in freq_counters_valid()
131 * Pre-compute the fixed ratio between the frequency of the constant in freq_inv_set_max_ratio()
135 * arch_max_freq_scale = ---------- * SCHED_CAPACITY_SCALE² in freq_inv_set_max_ratio()
138 * We use a factor of 2 * SCHED_CAPACITY_SHIFT -> SCHED_CAPACITY_SCALE² in freq_inv_set_max_ratio()
140 * very low reference frequencies (down to the KHz range which should in freq_inv_set_max_ratio()
172 * scale = ------- * -------------------- in amu_scale_freq_tick()
178 scale = core_cnt - prev_core_cnt; in amu_scale_freq_tick()
181 const_cnt - prev_const_cnt); in amu_scale_freq_tick()
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/linux/tools/testing/selftests/drivers/net/hw/
H A Dethtool_rmon.sh2 # SPDX-License-Identifier: GPL-2.0
16 declare -A netif_mtu
22 local current=$(ip -j link show dev $iface | jq -r '.[0].mtu')
23 local required=$((len - ETH_HLEN - ETH_FCS_LEN))
25 if [ $current -lt $required ]; then
44 # Mausezahn does not include FCS bytes in its length - but the
45 # histogram counters do
46 len=$((len - ETH_FCS_LEN))
49 before=$(ethtool --json -S $iface --groups rmon | \
50 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val")
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/linux/arch/mips/sibyte/common/
H A Dsb_tbprof.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright (C) 2007 Ralf Baechle <ralf@linux-mips.org>
7 * written by Ralf Baechle <ralf@linux-mips.org>
85 * Routines for using 40-bit SCD cycle counter
89 * zclk_timer_init(0) at least every 2^40 - 1 ZCLKs.
145 u64 next = (1ULL << 40) - tb_period; in arm_tb()
156 * Unfortunately, in Pass 2 we must clear all counters to knock down in arm_tb()
158 * requires ALL of the SCD perf counters. in arm_tb()
162 /* keep counters 0,2,3,4,5,6,7 as is */ in arm_tb()
167 M_SPC_CFG_CLEAR | /* clear all counters */ in arm_tb()
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/linux/drivers/md/dm-vdo/indexer/
H A Dsparse-cache.c1 // SPDX-License-Identifier: GPL-2.0-only
6 #include "sparse-cache.h"
10 #include <linux/dm-bufio.h>
13 #include "memory-alloc.h"
16 #include "chapter-index.h"
23 * least-recently-used (LRU). Again, the small size of the cache allows the LRU order to be
46 * All fields that might be frequently updated by that thread are kept in separate cache-aligned
75 * clear the skip_search flag, once again allowing the non-hook searches to use that cache entry.
84 * These counters are essentially fields of the struct cached_chapter_index, but are segregated
118 * The cache-aligned counters change often and are placed at the end of the structure to in __aligned()
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/linux/tools/perf/
H A Ddesign.txt2 Performance Counters for Linux
3 ------------------------------
5 Performance counters are special hardware registers available on most modern
7 as instructions executed, cachemisses suffered, or branches mis-predicted -
8 without slowing down the kernel or applications. These registers can also
9 trigger interrupts when a threshold number of events have passed - and can
13 hardware capabilities. It provides per task and per CPU counters, counter
15 provides "virtual" 64-bit counters, regardless of the width of the
16 underlying hardware counters.
18 Performance counters are accessed via special file descriptors.
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/linux/tools/perf/pmu-events/arch/x86/lunarlake/
H A Dpipeline.json28 …-speculative execution path is known. The branch prediction unit (BPU) predicts the target address…
54 …e. It is counted on a dedicated fixed counter, leaving the programmable counters available for oth…
125 …e. It is counted on a dedicated fixed counter, leaving the programmable counters available for oth…
157 "BriefDescription": "Number of instructions retired. Fixed Counter - architectural event",
161 …- an Architectural PerfMon event. Counting continues during hardware interrupts, traps, and inside…
176 "BriefDescription": "Number of instructions retired. General Counter - architectural event",
181 …- an Architectural PerfMon event. Counting continues during hardware interrupts, traps, and inside…
186 … because its address partially overlaps with an older store (size mismatch) - unknown_sta/bad_forw…
226 … the Topdown Slots event that were not consumed by the back-end pipeline due to lack of back-end r…
230 …-end pipeline due to lack of back-end resources, as a result of memory subsystem delays, execution…
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/linux/drivers/infiniband/ulp/opa_vnic/
H A Dopa_vnic_encap.h26 * - Redistributions of source code must retain the above copyright
28 * - Redistributions in binary form must reproduce the above copyright
32 * - Neither the name of Intel Corporation nor the names of its
84 #define OPA_VNIC_EMA_DATA (OPA_MGMT_MAD_SIZE - IB_MGMT_VENDOR_HDR)
118 * struct opa_vesw_info - OPA vnic switch information
119 * @fabric_id: 10-bit fabric id
120 * @vesw_id: 12-bit virtual ethernet switch id
155 * struct opa_per_veswport_info - OPA vnic per port information
171 * @non_vlan_sc_uc: sc for non-vlan unicast ethernet packets
172 * @non_vlan_vl_uc: vl for non-vlan unicast ethernet packets
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/linux/tools/testing/selftests/drivers/net/mlxsw/
H A Dqos_mc_aware.sh2 # SPDX-License-Identifier: GPL-2.0
6 # MC load. This issue can be overcome by putting the switch to MC-aware mode.
8 # under MC flood, and therefore that the MC-aware mode is enabled and correctly
17 # So instead we send traffic with mausezahn and use RX ethtool counters at $h3.
19 # each gets a different priority and we can use per-prio ethtool counters to
28 # +--
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H A Ddevlink_trap_l3_exceptions.sh2 # SPDX-License-Identifier: GPL-2.0
4 # Test devlink-trap L3 exceptions functionality over mlxsw.
8 # +------
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/linux/drivers/net/ethernet/intel/fm10k/
H A Dfm10k_common.c1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
7 * fm10k_get_bus_info_generic - Generic set PCI bus info
22 hw->bus_caps.width = fm10k_bus_width_pcie_x1; in fm10k_get_bus_info_generic()
25 hw->bus_caps.width = fm10k_bus_width_pcie_x2; in fm10k_get_bus_info_generic()
28 hw->bus_caps.width = fm10k_bus_width_pcie_x4; in fm10k_get_bus_info_generic()
31 hw->bus_caps.width = fm10k_bus_width_pcie_x8; in fm10k_get_bus_info_generic()
34 hw->bus_caps.width = fm10k_bus_width_unknown; in fm10k_get_bus_info_generic()
40 hw->bus_caps.speed = fm10k_bus_speed_2500; in fm10k_get_bus_info_generic()
43 hw->bus_caps.speed = fm10k_bus_speed_5000; in fm10k_get_bus_info_generic()
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/linux/drivers/media/test-drivers/vivid/
H A Dvivid-kthread-touch.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * vivid-kthread-touch.c - touch capture thread support functions.
9 #include "vivid-core.h"
10 #include "vivid-kthread-touch.h"
11 #include "vivid-touch-cap.h"
18 spin_lock(&dev->slock); in vivid_thread_tch_cap_tick()
19 if (!list_empty(&dev->touch_cap_active)) { in vivid_thread_tch_cap_tick()
20 tch_cap_buf = list_entry(dev->touch_cap_active.next, in vivid_thread_tch_cap_tick()
22 list_del(&tch_cap_buf->list); in vivid_thread_tch_cap_tick()
25 spin_unlock(&dev->slock); in vivid_thread_tch_cap_tick()
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/linux/Documentation/timers/
H A Dtimekeeping.rst10 If you grep through the kernel source you will find a number of architecture-
12 architecture-specific overrides of the sched_clock() function and some
17 on this timeline, providing facilities such as high-resolution timers.
19 provide an accurate delay source using hardware counters.
23 -------------
31 n bits which count from 0 to (2^n)-1 and then wraps around to 0 and start over.
36 shall be as stable and correct as possible as compared to a real-world wall
46 When the wall-clock accuracy of the clock source isn't satisfactory, there
48 the user-visible time to RTC clocks in the system or against networked time
73 register counts up or down, and the timer clock rate, and then conjure all
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/linux/mm/
H A DKconfig.debug1 # SPDX-License-Identifier: GPL-2.0-only
24 use-after-free). The error reports for these checks can be augmented
71 "slab_debug=-".
86 detect use-after-free accesses in such caches.
118 for user-space helper.
166 bool "Enable tracepoint to track down page reference manipulation"
170 This is a feature to add tracepoint for tracking down page reference
178 bool "Testcase for the marking rodata read-only"
181 This option enables a testcase for the setting rodata read-only.
211 once the kernel has booted up - it's a one time check.
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/linux/drivers/scsi/elx/efct/
H A Defct_xport.c1 // SPDX-License-Identifier: GPL-2.0
35 xport->efct = efct; in efct_xport_alloc()
49 if (!efct->sess_debugfs_dir) { in efct_xport_init_debugfs()
50 efct->sess_debugfs_dir = debugfs_create_dir("sessions", in efct_xport_init_debugfs()
52 if (IS_ERR(efct->sess_debugfs_dir)) { in efct_xport_init_debugfs()
63 return -EIO; in efct_xport_init_debugfs()
69 debugfs_remove(efct->sess_debugfs_dir); in efct_xport_delete_debugfs()
70 efct->sess_debugfs_dir = NULL; in efct_xport_delete_debugfs()
83 struct efct *efct = xport->efct; in efct_xport_attach()
86 rc = efct_hw_setup(&efct->hw, efct, efct->pci); in efct_xport_attach()
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/linux/drivers/infiniband/hw/mlx5/
H A Dcounters.c1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright (c) 2013-2020, Mellanox Technologies inc. All rights reserved.
9 #include "counters.h"
143 static int mlx5_ib_read_counters(struct ib_counters *counters, in mlx5_ib_read_counters() argument
147 struct mlx5_ib_mcounters *mcounters = to_mcounters(counters); in mlx5_ib_read_counters()
152 mutex_lock(&mcounters->mcntrs_mutex); in mlx5_ib_read_counters()
153 if (mcounters->cntrs_max_index > read_attr->ncounters) { in mlx5_ib_read_counters()
154 ret = -EINVAL; in mlx5_ib_read_counters()
158 mread_attr.out = kcalloc(mcounters->counters_num, sizeof(u64), in mlx5_ib_read_counters()
161 ret = -ENOMEM; in mlx5_ib_read_counters()
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/linux/drivers/edac/
H A Dedac_device.c44 edac_dev, edac_dev->dev_idx); in edac_device_dump_device()
45 edac_dbg(4, "\tedac_dev->edac_check = %p\n", edac_dev->edac_check); in edac_device_dump_device()
46 edac_dbg(3, "\tdev = %p\n", edac_dev->dev); in edac_device_dump_device()
48 edac_dev->mod_name, edac_dev->ctl_name); in edac_device_dump_device()
49 edac_dbg(3, "\tpvt_info = %p\n\n", edac_dev->pvt_info); in edac_device_dump_device()
78 dev_ctl->instances = dev_inst; in edac_device_alloc_ctl_info()
84 dev_ctl->blocks = dev_blk; in edac_device_alloc_ctl_info()
91 dev_ctl->pvt_info = pvt; in edac_device_alloc_ctl_info()
94 dev_ctl->dev_idx = device_index; in edac_device_alloc_ctl_info()
95 dev_ctl->nr_instances = nr_instances; in edac_device_alloc_ctl_info()
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