Timing Parameters#

The emc_log timing parameters are described in the following diagram:

image1

In the above figure, four clients are specified, and a period of 3 is specified. The start delay is 1 s.

To sample a group#

  • The following command samples the mpcore group for 30 seconds:

emc_log -chip <TBD_chip_id> -group mpcore -length 30

To sample an individual client#

  • The following command samples the nvdisplayr client for 30 seconds:

emc_log -chip <TBD_chip_id> -client nvdisplayr -length 30

To sample multiple clients#

  • The following command samples the clients nvdisplayr and nvdisplayr1 for 30 seconds:

emc_log -chip <TBD_chip_id> -client nvdisplayr -client nvdisplayr1 -length 30
  • The following code shows the emc_log commands and output.

# emc_log -chip <TBD_chip_id> -help
[77/1864]
emc_log version 2.0.0
CHIPID: TEGRA_CHIPID_TEGRA<TBD_t-arch>
Usage: emc_log [-option]
Options:
  -help                    : Print this help screen
  -chip <chipid>           : Specify the chip id, the supported chips are: 0x40, 0x13, 0x21 and 0x18. The option is required for chip 0x18
  -group <groupName>       : Collect stats for all clients in <groupName>
  -client <clientName>     : Collect stats for <clientName>
  -window <int>            : Sample every <int> ms, default = 1000 ms
   -startdelay <int>       : Delay sampling for <int> seconds (default = 1s)
  -length <int>            : Sample for at least <int> seconds (default = 10s)
  -period <int>            : Set the period for rescheduling
  -mode <none/address/client>  : Set the mode for rescheduling
  -address_low <int>       : Set the low address for address filtering
  -address_length <int>    : Set the total range of address for address filtering
  -address_window_size <int>   : Set the size of window for address filtering (address mode only)
  -o <filename>        : If specified, output data to this file. Otherwise, output data to stdout
  -verbose                 : Print details from log buffer
  -total                   : Collect the total stats for all clients specified
  -debug                   : Print commands sent to sysfs
  -slack_hi                : Set the SLACK_LIMIT_HI
  -slack_lo                : Set the SLACK_LIMIT_LO
  -stats <bw/expired/histo>: Select the statistics to be collected
More than one client / group can be specified at a time.
If more clients are specified than the hardware can sample
simultaneously, clients will be sampled in a round-robin order.
        Group               Client                        ID
        ptc                 ptcr                           0
        afi                 afir                          14
        hda                 hdar                          21
        hc                  host1xdmar                    22
        nvenc               nvencsrd                      28
        sata                satar                         31
        mpcore              mpcorer                       39
        nvenc               nvencswr                      43
        afi                 afiw                          49
        hda                 hdaw                          53
        mpcore              mpcorew                       57
        sata                sataw                         61
        isp2                ispra                         68
        isp2                ispwa                         70
        isp2                ispwb                         71
        xusb_host           xusb_hostr                    74
        xusb_host           xusb_hostw                    75
        xusb_dev            xusb_devr                     76
        xusb_dev            xusb_devw                     77
        tsec                tsecsrd                       84
        tsec                tsecswr                       85
        gpu                 gpusrd                        88
        gpu                 gpuswr                        89
        sdmmc1a             sdmmcra                       96
        sdmmc2a             sdmmcraa                      97
        sdmmc3a             sdmmcr                        98
        sdmmc4a             sdmmcrab                      99
        sdmmc1a             sdmmcwa                      100
        sdmmc2a             sdmmcwaa                     101
        sdmmc3a             sdmmcw                       102
        sdmmc4a             sdmmcwab                     103
        vic                 vicsrd                       108
        vic                 vicswr                       109
        vi                  viw                          114
        nvdec               nvdecsrd                     120
        nvdec               nvdecswr                     121
        ape                 aper                         122
        ape                 apew                         123
        nvjpg               nvjpgsrd                     126
        nvjpg               nvjpgswr                     127
        se                  sesrd                        128
        se                  seswr                        129
        etr                 etrr                         132
        etr                 etrw                         133
        tsecb               tsecsrdb                     134
        tsecb               tsecswrb                     135
        gpu                 gpusrd2                      136
        gpu                 gpuswr2                      137
        axis                axisr                        140
        axis                axisw                        141
        eqos                eqosr                        142
        eqos                eqosw                        143
        ufshc               ufshcr                       144
        ufshc               ufshcw                       145
        nvdisplay           nvdisplayr                   146
        bpmp                bpmpr                        147
        bpmp                bpmpw                        148
        bpmp                bpmpdmar                     149
        bpmp                bpmpdmaw                     150
        aon                 aonr                         151
        aon                 aonw                         152
        aon                 aondmar                      153
        aon                 aondmaw                      154
        sce                 scer                         155
        sce                 scew                         156
        sce                 scedmar                      157
        sce                 scedmaw                      158
        ape                 apedmar                      159
        ape                 apedmaw                      160
        nvdisplay           nvdisplayr1                  161
        vic                 vicsrd1                      162
        nvdec               nvdecsrd1                    163
        emc                 dram_stat_begin              165
        dram                activate_cnt                 165
        dram                read_cnt                     166
        dram                read8_cnt                    167
        dram                write_cnt                    168
        dram                write8_cnt                   169
        dram                ref_cnt                      170
        dram          extclks_cke_eq0_no_banks_active    171
        dram          clkstop_cke_eq0_no_banks_active    172
        dram          extclks_cke_eq1_no_banks_active    173
        dram          clkstop_cke_eq1_no_banks_active    174
        dram          extclks_cke_eq0_some_banks_active  175
        dram          clkstop_cke_eq0_some_banks_active  176
        dram          extclks_cke_eq1_some_banks_active  177
        dram          clkstop_cke_eq1_some_banks_active  178
        dram                sr_cke_eq0_clks              179
        dram                dsr                          180
                            readtally                    253
                            writetally                   254
                            aggregate                    255
==============================================================
emc_log -chip <TBD_chip_id> -group mpcore
/emc_log version 2.0.0
CHIPID: TEGRA_CHIPID_TEGRA<TBD_t-arch>
Delay sampling for 1 seconds...
Start sampling for 10 seconds...
debug_fs = /sys/kernel/debug
Duration(ms)    Client ID    Bandwidth(KBps)
1000     39        181273.093750
1000     57        164767.687500
1000     39        181272.203125
1000     57        164773.265625
1000     39        181252.015625
1000     57        164762.453125
1000     39        181229.359375
1000     57        164745.640625
1000     39        181245.625000
1000     57        164762.562500
1000     39        181219.078125
1000     57        164737.031250
1000     39        181261.812500
1000     57        164781.703125
1000     39        181275.265625
1000     57        164793.890625
1000     39        181292.203125
1000     57        164804.015625
==============================================================
emc_log -chip <TBD_chip_id>  -group nvdisplay
emc_log version 2.0.0
CHIPID: TEGRA_CHIPID_TEGRA<TBD_t-arch>
Delay sampling for 1 seconds...
Start sampling for 10 seconds...
debug_fs = /sys/kernel/debug
Duration(ms)    Client ID    Bandwidth(KBps)
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
1000     146        0.000000
1000     161        0.000000
==============================================================
emc_log -chip <TBD_chip_id>  -client nvdisplayr
emc_log version 2.0.0
CHIPID: TEGRA_CHIPID_TEGRA<TBD_t-arch>
Delay sampling for 1 seconds...
Start sampling for 10 seconds...
debug_fs = /sys/kernel/debug
Duration(ms)    Client ID    Bandwidth(KBps)
1000     146        0.000000
1000     146        0.000000
1000     146        0.000000
1000     146        0.000000
1000     146        0.000000
1000     146        0.000000
1000     146        0.000000
1000     146        0.000000
1000     146        0.000000