Re: [PATCH v7 7/8] perf tools: Check write_backward during evlist config

2016-06-19 Thread Wangnan (F)
On 2016/6/17 5:47, Arnaldo Carvalho de Melo wrote: Em Wed, Jun 15, 2016 at 02:23:34AM +, Wang Nan escreveu: Before this patch, when using overwritable ring buffer on an old kernel, error message is misleading: # ~/perf record -m 1 -e raw_syscalls:*/overwrite/ -a Error: The

Re: [PATCH v7 7/8] perf tools: Check write_backward during evlist config

2016-06-19 Thread Wangnan (F)
On 2016/6/17 5:47, Arnaldo Carvalho de Melo wrote: Em Wed, Jun 15, 2016 at 02:23:34AM +, Wang Nan escreveu: Before this patch, when using overwritable ring buffer on an old kernel, error message is misleading: # ~/perf record -m 1 -e raw_syscalls:*/overwrite/ -a Error: The

Re: [PATCH v7 7/8] perf tools: Check write_backward during evlist config

2016-06-16 Thread Arnaldo Carvalho de Melo
Em Wed, Jun 15, 2016 at 02:23:34AM +, Wang Nan escreveu: > Before this patch, when using overwritable ring buffer on an old > kernel, error message is misleading: > > # ~/perf record -m 1 -e raw_syscalls:*/overwrite/ -a > Error: > The raw_syscalls:sys_enter event is not supported. > >

Re: [PATCH v7 7/8] perf tools: Check write_backward during evlist config

2016-06-16 Thread Arnaldo Carvalho de Melo
Em Wed, Jun 15, 2016 at 02:23:34AM +, Wang Nan escreveu: > Before this patch, when using overwritable ring buffer on an old > kernel, error message is misleading: > > # ~/perf record -m 1 -e raw_syscalls:*/overwrite/ -a > Error: > The raw_syscalls:sys_enter event is not supported. > >

[PATCH v7 7/8] perf tools: Check write_backward during evlist config

2016-06-14 Thread Wang Nan
Before this patch, when using overwritable ring buffer on an old kernel, error message is misleading: # ~/perf record -m 1 -e raw_syscalls:*/overwrite/ -a Error: The raw_syscalls:sys_enter event is not supported. This patch output clear error message to tell user his/her kernel is too old:

[PATCH v7 7/8] perf tools: Check write_backward during evlist config

2016-06-14 Thread Wang Nan
Before this patch, when using overwritable ring buffer on an old kernel, error message is misleading: # ~/perf record -m 1 -e raw_syscalls:*/overwrite/ -a Error: The raw_syscalls:sys_enter event is not supported. This patch output clear error message to tell user his/her kernel is too old: