linux-kernel - Re: [PATCH] perf tools: Fix auto-complete on aarch64

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Date:   Wed, 8 Feb 2023 10:35:17 +0000
From:   James Clark <james.clark@....com>
To:     Yicong Yang <yangyicong@...wei.com>, acme@...nel.org
Cc:     linux-arm-kernel@...ts.infradead.org, yangyicong@...ilicon.com,
        linuxarm@...wei.com, prime.zeng@...ilicon.com,
        mark.rutland@....com, peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, yao.jin@...ux.intel.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tools: Fix auto-complete on aarch64



On 07/02/2023 03:50, Yicong Yang wrote:
> From: Yicong Yang <yangyicong@...ilicon.com>
> 
> On aarch64 CPU related events are not under event_source/devices/cpu/events,
> they're under event_source/devices/armv8_pmuv3_0/events on my machine.
> Using current auto-complete script will generate below error:
> 
> [root@...alhost bin]# perf stat -e
> ls: cannot access '/sys/bus/event_source/devices/cpu/events': No such file or directory
> 
> Fix this by not test /sys/bus/event_source/devices/cpu/events on aarch64
> machine.
> 
> Fixes: 74cd5815d9af ("perf tool: Improve bash command line auto-complete for multiple events with comma")
> Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
> ---
>  tools/perf/perf-completion.sh | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 

Reviewed-by: James Clark <james.clark@....com>

> diff --git a/tools/perf/perf-completion.sh b/tools/perf/perf-completion.sh
> index fdf75d45efff..978249d7868c 100644
> --- a/tools/perf/perf-completion.sh
> +++ b/tools/perf/perf-completion.sh
> @@ -165,7 +165,12 @@ __perf_main ()
>  
>  		local cur1=${COMP_WORDS[COMP_CWORD]}
>  		local raw_evts=$($cmd list --raw-dump)
> -		local arr s tmp result
> +		local arr s tmp result cpu_evts
> +
> +		# aarch64 doesn't have /sys/bus/event_source/devices/cpu/events
> +		if [[ `uname -m` != aarch64 ]]; then
> +			cpu_evts=$(ls /sys/bus/event_source/devices/cpu/events)
> +		fi
>  
>  		if [[ "$cur1" == */* && ${cur1#*/} =~ ^[A-Z] ]]; then
>  			OLD_IFS="$IFS"
> @@ -183,9 +188,9 @@ __perf_main ()
>  				fi
>  			done
>  
> -			evts=${result}" "$(ls /sys/bus/event_source/devices/cpu/events)
> +			evts=${result}" "${cpu_evts}
>  		else
> -			evts=${raw_evts}" "$(ls /sys/bus/event_source/devices/cpu/events)
> +			evts=${raw_evts}" "${cpu_evts}
>  		fi
>  
>  		if [[ "$cur1" == , ]]; then