/usr/bin/atopsar: invalid option -- '-'
Usage: /usr/bin/atopsar [-flags] [-r file|-|date|y...] [-R cnt] [-b time] [-e time]
		or
Usage: /usr/bin/atopsar [-flags] interval [samples]

	Today's atop logfile is used by default!

	Generic flags:
	  -r  read statistical data from specific atop logfile
	      (pathname, - for stdin, date in format YYYYMMDD, or y[y..])
	  -R  summarize <cnt> samples into one sample
	  -b  begin  showing data from  specified time as [YYYYMMDD]hhmm[ss]
	  -e  finish showing data after specified time as [YYYYMMDD]hhmm[ss]
	  -S  print timestamp on every line in case of more resources
	  -x  never  use colors to indicate overload (default: only if tty)
	  -C  always use colors to indicate overload (default: only if tty)
	  -M  use markers to indicate overload (* = critical, + = almost)
	  -H  repeat report headers (in case of tty: depending on screen lines)
	  -a  print all resources, even when inactive

	Specific flags to select reports:
	  -A  print all available reports
	  -c  cpu utilization
	  -p  process(or) load
	  -P  processes & threads
	  -g  gpu utilization
	  -m  memory & swapspace
	  -s  swap rate
	  -B  pressure stall info (PSI)
	  -l  logical volume activity
	  -f  multiple device activity
	  -d  disk activity
	  -h  infiniband utilization
	  -n  NFS client mounts
	  -j  NFS client activity
	  -J  NFS server activity
	  -i  net-interf (general)
	  -I  net-interf (errors)
	  -w  ip   v4    (general)
	  -W  ip   v4    (errors)
	  -y  icmp v4    (general)
	  -Y  icmp v4    (per type)
	  -u  udp  v4
	  -z  ip   v6    (general)
	  -Z  ip   v6    (errors)
	  -k  icmp v6    (general)
	  -K  icmp v6    (per type)
	  -U  udp  v6
	  -t  tcp        (general)
	  -T  tcp        (errors)
	  -O  top-3 processes cpu
	  -G  top-3 processes memory
	  -D  top-3 processes disk
	  -N  top-3 processes network

Please refer to the man-page of 'atopsar' for more details.