• David Ahern's avatar
    perf tools: Emit clearer message for sys_perf_event_open ENOENT return · ca6a4258
    David Ahern authored
    Resend of patch sent back in January 2011 in light of recent confusion around
    unsupported events for a given platform.
    
    Improve sys_perf_event_open ENOENT return handling in top and record, just
    like 5a3446bc does for stat.
    
    Retry of Arnaldo's patch using ui_warning instead of die which allows the
    fallback from hardware cycles to software clock.
    
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: linux-kernel@vger.kernel.org
    LKML-Reference: <1301080271-20945-1-git-send-email-daahern@cisco.com>
    Signed-off-by: default avatarDavid Ahern <daahern@cisco.com>
    [ committer note: Some adjustments to make it apply to newer codebase ]
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    ca6a4258
builtin-record.c 21.8 KB