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/linux-6.15/Documentation/filesystems/
H A Dmultigrain-ts.rst18 Coarse timestamps are therefore good from a performance standpoint, since they
23 They are particularly troublesome with NFSv3, where unchanging timestamps can
29 Multigrain timestamps aim to remedy this by selectively using fine-grained
30 timestamps when a file has had its timestamps queried recently, and the current
35 There are currently 3 timestamps in the inode that are updated to the current
55 Multigrain timestamps are only tracked for the ctime and the mtime. atimes are
62 timestamps also serve an important purpose in applications like "make". These
91 atime will always use coarse-grained timestamps.
101 It's not sufficient to simply use fine or coarse-grained timestamps based on
116 Multigrain timestamps are intended for use by local filesystems that get
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H A Dcramfs.rst38 No timestamps are stored in a cramfs, so these default to the epoch
39 (1970 GMT). Recently-accessed files may have updated timestamps, but
/linux-6.15/drivers/gpu/drm/amd/display/dc/link/accessories/
H A Dlink_dp_trace.c110 link->dp_trace.detect_lt_trace.timestamps.start = dm_get_timestamp(link->dc->ctx); in dp_trace_set_lt_start_timestamp()
112 link->dp_trace.commit_lt_trace.timestamps.start = dm_get_timestamp(link->dc->ctx); in dp_trace_set_lt_start_timestamp()
119 link->dp_trace.detect_lt_trace.timestamps.end = dm_get_timestamp(link->dc->ctx); in dp_trace_set_lt_end_timestamp()
121 link->dp_trace.commit_lt_trace.timestamps.end = dm_get_timestamp(link->dc->ctx); in dp_trace_set_lt_end_timestamp()
128 return link->dp_trace.detect_lt_trace.timestamps.end; in dp_trace_get_lt_end_timestamp()
130 return link->dp_trace.commit_lt_trace.timestamps.end; in dp_trace_get_lt_end_timestamp()
/linux-6.15/Documentation/networking/
H A Dtimestamping.rst39 timestamps for stream sockets.
105 Request rx timestamps when data enters the kernel. These timestamps
114 Request tx timestamps when data leaves the kernel. These timestamps
162 Report any software timestamps when available.
168 Report hardware timestamps as generated by
302 requesting transmit timestamps only.
320 1.3.4. Enabling timestamps via control messages
344 setsockopt to receive timestamps::
458 on hardware transmit timestamps.
460 2.1.1 Transmit timestamps with MSG_ERRQUEUE
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/linux-6.15/Documentation/devicetree/bindings/timestamp/
H A Dhte-consumer.yaml15 timestamps:
30 timestamp-names: [ timestamps ]
37 timestamps = <&tegra_hte_aon 0x9>, <&tegra_hte_lic 0x19>;
H A Dhardware-timestamps-common.yaml4 $id: http://devicetree.org/schemas/timestamp/hardware-timestamps-common.yaml#
/linux-6.15/drivers/staging/media/meson/vdec/
H A Dvdec_helpers.c246 list_add_tail(&new_ts->list, &sess->timestamps); in amvdec_add_ts()
258 list_for_each_entry(tmp, &sess->timestamps, list) { in amvdec_remove_ts()
328 struct list_head *timestamps = &sess->timestamps; in amvdec_dst_buf_done() local
335 if (list_empty(timestamps)) { in amvdec_dst_buf_done()
344 tmp = list_first_entry(timestamps, struct amvdec_timestamp, list); in amvdec_dst_buf_done()
372 list_for_each_entry_safe(tmp, n, &sess->timestamps, list) { in amvdec_dst_buf_done_offset()
H A Dvdec.h273 struct list_head timestamps; member
/linux-6.15/Documentation/sound/designs/
H A Dtimestamping.rst5 The ALSA API can provide two different system timestamps:
23 timestamps allow for applications to keep track of the 'fullness' of
33 When timestamps are enabled, the avail/delay information is reported
111 counter-intuitively not increase the precision of timestamps, e.g. if a
129 timestamps from hardware registers or from IPC takes time, the more
130 timestamps are read the more imprecise the combined measurements
132 timestamp is reported. Applications that need different timestamps
185 error. In example 3 where the timestamps are measured with the link
186 wallclock, the timestamps show a monotonic behavior and a lower
/linux-6.15/Documentation/driver-api/hte/
H A Dhte.rst16 in obtaining timestamps than using software counterparts i.e. ktime and
49 - Converts timestamps in nanoseconds.
77 The dropped timestamps for a given line.
H A Dtegra-hte.rst17 This GTE instance timestamps GPIO in real time. For that to happen GPIO
37 This GTE instance timestamps LIC IRQ lines in real time. The hte devicetree
/linux-6.15/Documentation/ABI/testing/
H A Dsysfs-ptp111 timestamps. To enable external timestamps, write the
113 To disable external timestamps, write the channel
120 This file provides timestamps on external events, in
/linux-6.15/tools/testing/selftests/net/packetdrill/
H A Dtcp_timestamping_client-only-last-byte.pkt2 // Test that tx timestamping sends timestamps only for
31 // Make sure that internal TCP timestamps are not overwritten and we have sane
H A Dtcp_timestamping_partial.pkt32 // Make sure that internal TCP timestamps are not overwritten and we have sane
/linux-6.15/tools/perf/Documentation/
H A Dperf-inject.txt86 Some architectures may capture AUX area data which contains timestamps
87 affected by virtualization. This option will update those timestamps
88 in place, to correlate with host timestamps. The in-place update means
/linux-6.15/drivers/net/ethernet/sfc/siena/
H A Dptp.c1107 struct skb_shared_hwtstamps timestamps; in efx_ptp_xmit_skb_mc() local
1136 memset(&timestamps, 0, sizeof(timestamps)); in efx_ptp_xmit_skb_mc()
1137 timestamps.hwtstamp = ptp_data->nic_to_kernel_time( in efx_ptp_xmit_skb_mc()
1142 skb_tstamp_tx(skb, &timestamps); in efx_ptp_xmit_skb_mc()
1205 struct skb_shared_hwtstamps *timestamps; in efx_ptp_match_rx() local
1208 timestamps = skb_hwtstamps(skb); in efx_ptp_match_rx()
1209 timestamps->hwtstamp = evt->hwtimestamp; in efx_ptp_match_rx()
1991 struct skb_shared_hwtstamps *timestamps; in __efx_siena_rx_skb_attach_timestamp() local
2034 timestamps = skb_hwtstamps(skb); in __efx_siena_rx_skb_attach_timestamp()
2035 timestamps->hwtstamp = in __efx_siena_rx_skb_attach_timestamp()
/linux-6.15/Documentation/kbuild/
H A Dreproducible-builds.rst19 The kernel embeds timestamps in three places:
24 * File timestamps in the embedded initramfs
26 * If enabled via ``CONFIG_IKHEADERS``, file timestamps of kernel
/linux-6.15/Documentation/devicetree/bindings/counter/
H A Dti,am62-ecap-capture.yaml13 The eCAP module resources can be used to capture timestamps
/linux-6.15/Documentation/core-api/
H A Dtimekeeping.rst20 Useful for reliable timestamps and measuring short time intervals
37 user space. This is used for all timestamps that need to
126 but can't easily use 'jiffies', e.g. for inode timestamps.
/linux-6.15/drivers/net/ethernet/sfc/
H A Dptp.c1126 struct skb_shared_hwtstamps timestamps; in efx_ptp_xmit_skb_mc() local
1154 memset(&timestamps, 0, sizeof(timestamps)); in efx_ptp_xmit_skb_mc()
1155 timestamps.hwtstamp = ptp_data->nic_to_kernel_time( in efx_ptp_xmit_skb_mc()
1160 skb_tstamp_tx(skb, &timestamps); in efx_ptp_xmit_skb_mc()
2033 struct skb_shared_hwtstamps *timestamps; in __efx_rx_skb_attach_timestamp() local
2076 timestamps = skb_hwtstamps(skb); in __efx_rx_skb_attach_timestamp()
2077 timestamps->hwtstamp = in __efx_rx_skb_attach_timestamp()
/linux-6.15/Documentation/userspace-api/media/v4l/
H A Dstreaming-par.rst19 not augmented by timestamps or sequence counters, and to avoid
H A Dmetafmt-uvc.rst18 timing information, required for precise interpretation of timestamps, contained
H A Drw.rst20 counters or timestamps are passed. This information is necessary to
/linux-6.15/Documentation/driver-api/
H A Dioctl.rst87 Traditionally, timestamps and timeout values are passed as ``struct
104 Timeout values and timestamps should ideally use CLOCK_MONOTONIC time,
106 CLOCK_REALTIME, this makes the timestamps immune from jumping backwards
109 ktime_get_real_ns() can be used for CLOCK_REALTIME timestamps that
/linux-6.15/drivers/net/ethernet/marvell/octeontx2/nic/
H A Dotx2_txrx.h102 struct qmem *timestamps; member

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