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trace: update description of tracepoint number

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Make it clear that number of entries might not be equal
to the number of recorded traces, as some of the latter
might occupy two entries due to their length.

Change-Id: I3099cfb719c38bdee48fbe20fccef3ef43e820a3
Signed-off-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/16916
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
This commit is contained in:
Krzysztof Karas 2023-02-22 13:22:55 +01:00 committed by Tomasz Zawadzki
parent 7413e1e497
commit a8f7d7cf0a
1 changed files with 1 additions and 0 deletions
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lib/event/app.c
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@ -890,6 +890,7 @@ usage(void (*app_usage)(void))
printf(" --base-virtaddr <addr> the base virtual address for DPDK (default: 0x200000000000)\n");
printf(" --num-trace-entries <num> number of trace entries for each core, must be power of 2, setting 0 to disable trace (default %d)\n",
SPDK_APP_DEFAULT_NUM_TRACE_ENTRIES);
printf(" Tracepoints vary in size and can use more than one trace entry.\n");
printf(" --rpcs-allowed comma-separated list of permitted RPCS\n");
printf(" --env-context Opaque context for use of the env implementation\n");
printf(" --vfio-vf-token VF token (UUID) shared between SR-IOV PF and VFs for vfio_pci driver\n");