Re: Performance monitor signal handler

>     Just  to  get  some  evidence  at hand - could some owners of
>     different platforms compile and run  the  attached  little  C
>     source please?

$ uname -srm
FreeBSD 4.1.1-STABLE
$ ./jan
Pipe buffer is 16384 bytes
Sys-V message queue buffer is 2048 bytes

$ uname -srm
NetBSD 1.5 alpha
$ ./jan
Pipe buffer is 4096 bytes
Sys-V message queue buffer is 2048 bytes

$ uname -srm
NetBSD 1.5_BETA2 i386
$ ./jan
Pipe buffer is 4096 bytes
Sys-V message queue buffer is 2048 bytes

$ uname -srm
NetBSD 1.4.2 i386
$ ./jan
Pipe buffer is 4096 bytes
Sys-V message queue buffer is 2048 bytes

$ uname -srm
NetBSD 1.4.1 sparc
$ ./jan
Pipe buffer is 4096 bytes
Bad system call (core dumped)    # no SysV IPC in running kernel

$ uname -srm
HP-UX B.11.11 9000/800
$ ./jan
Pipe buffer is 8192 bytes
Sys-V message queue buffer is 16384 bytes

$ uname -srm
HP-UX B.11.00 9000/813
$ ./jan
Pipe buffer is 8192 bytes
Sys-V message queue buffer is 16384 bytes

$ uname -srm
HP-UX B.10.20 9000/871
$ ./jan
Pipe buffer is 8192 bytes
Sys-V message queue buffer is 16384 bytes

HP-UX can also use STREAMS based pipes if the kernel parameter
streampipes is set.  Using STREAMS based pipes increases the pipe
buffer size by a lot:

# uname -srm 
HP-UX B.11.11 9000/800
# ./jan
Pipe buffer is 131072 bytes
Sys-V message queue buffer is 16384 bytes

# uname -srm
HP-UX B.11.00 9000/800
# ./jan
Pipe buffer is 131072 bytes
Sys-V message queue buffer is 16384 bytes

Regards,

Giles