linux-kernel - Re: [PATCH 2/9] perf sched replay: Increase the MAX_PID value to fix assertion failure problem

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Date:	Tue, 31 Mar 2015 08:25:56 -0600
From:	David Ahern <dsahern@...il.com>
To:	Yunlong Song <yunlong.song@...wei.com>, a.p.zijlstra@...llo.nl,
	paulus@...ba.org, mingo@...hat.com, acme@...nel.org
CC:	linux-kernel@...r.kernel.org, wangnan0@...wei.com
Subject: Re: [PATCH 2/9] perf sched replay: Increase the MAX_PID value to
 fix assertion failure problem

On 3/31/15 7:46 AM, Yunlong Song wrote:
> diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
> index a1893e8..c466104 100644
> --- a/tools/perf/builtin-sched.c
> +++ b/tools/perf/builtin-sched.c
> @@ -28,7 +28,7 @@
>   #define MAX_CPUS		4096
>   #define COMM_LEN		20
>   #define SYM_LEN			129
> -#define MAX_PID			65536
> +#define MAX_PID			1024000
>
>   struct sched_atom;

# cat /proc/sys/kernel/pid_max
1048576

so your proposed change is still not high enough for what I need.

It would be best to make it dynamic, not static, with run time 
reallocations as needed.

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