37b0d996dc
Provides a top-like view of syscall consumers. MFC after: 3 days X-MFC-to: stable/11 Sponsored by: Smule, Inc.
85 lines
2.2 KiB
Bash
85 lines
2.2 KiB
Bash
# -*- tab-width: 4 -*- ;; Emacs
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# vi: set filetype=sh tabstop=8 shiftwidth=8 noexpandtab :: Vi/ViM
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############################################################ IDENT(1)
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#
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# $Title: dwatch(8) profile for top-like syscall $
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# $Copyright: 2014-2018 Devin Teske. All rights reserved. $
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# $FreeBSD$
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#
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############################################################ DESCRIPTION
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#
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# Every 3 seconds update the screen with syscall consumers.
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#
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############################################################ PRAGMAS
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# Optional: You can override the default pragmas (shown below)
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DTRACE_PRAGMA="
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option quiet
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option aggsortrev
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" # END-QUOTE
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############################################################ PROBE
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: ${PROBE:=profile:::tick-3s}
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############################################################ ACTIONS
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exec 9<<EOF
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BEGIN { printf("Sampling ...") } /* probe ID $ID */
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syscall:::entry /* probe ID $(( $ID + 1 )) */
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{
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@num[probefunc,execname] = count();
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}
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END { trunc(@num) } /* probe ID $(( $ID + 2 )) */
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EOF
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ACTIONS=$( cat <&9 )
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ID=$(( $ID + 3 ))
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############################################################ EVENT TAG
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# The EVENT_TAG is run inside the print action after the timestamp has been
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# printed. By default, `UID.GID CMD[PID]: ' of the process is printed.
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#
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# Here we override the default EVENT_TAG to include ANSI cursor-homing and
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# screen-clearing codes.
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size=$( stty size 2> /dev/null )
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rows="${size%% *}"
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cols="${size#* }"
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exec 9<<EOF
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printf("\033[H"); /* Position the cursor at top-left */
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printf("\033[J"); /* Clear display from cursor to end */
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/* Header line containing probe (left) and date (right) */
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printf("%-*s%s%Y%s\n",
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$(( ${cols:-80} - 20 )), "$PROBE",
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console ? "\033[32m" : "",
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walltimestamp,
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console ? "\033[39m" : "");
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/* Column headers */
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printf("%s%8s %-20s %s%s\n",
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console ? "\033[1m" : "",
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"COUNT",
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"SYSCALL",
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"EXECNAME",
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console ? "\033[22m" : "");
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EOF
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EVENT_TAG=$( cat <&9 )
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############################################################ EVENT DETAILS
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exec 9<<EOF
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printa("%@8u %-20s %s\n", @num);
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trunc(@num);
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EOF
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EVENT_DETAILS=$( cat <&9 )
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################################################################################
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# END
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################################################################################
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