Re: Performance Counters
On Thu, Feb 19, 2015 at 6:11 AM, Sai Prajeeth cspraje...@gmail.com wrote: Does pctr count events for all CPUs or just 1 CPU? I cant seem to find any good documentation for pctr other than its man page. I tried it and the values it gives are differing too much. The pctr driver is currently not MP aware, so it only sets or fetches the counters on the CPU it's run on, making it very hard to use on MP boxes. :-( Also is there any explanation of what the unit masks are for the specific functions (-m command line option) ? You need to consult the documentation for your CPU to see what UMASK values are supported and how they are interpreted. For Intel CPUs, this is in volume 3b System Programming Guide, Part 2, chapters 18 and 19, for example. Philip Guenther
Re: Performance Counters
Op Wed, 18 Feb 2015 10:15:26 +0100 schreef Sai Prajeeth cspraje...@gmail.com: Is there any command that will let me access the processor's performance counters?? I am looking for something like Linux's perf / FreeBSDs pmcstat that will help me get the IPC (Instructions per cycle) of the system. $ apropos 'performance counter' pctr(1) - display CPU performance counters pctr(4/amd64) - driver for CPU performance counters pctr(4/i386) - driver for CPU performance counters uperf(4/sparc64) - performance counters driver -- (Remove the obvious prefix to reply privately.) Gemaakt met Opera's e-mailprogramma: http://www.opera.com/mail/
Re: Performance Counters
Does pctr count events for all CPUs or just 1 CPU? I cant seem to find any good documentation for pctr other than its man page. I tried it and the values it gives are differing too much. I am counting INST_RET and CPU_CLK_UNHALTED. The ratio of these 2 gives the IPC and i am getting very varied results for the same run of the program. Also is there any explanation of what the unit masks are for the specific functions (-m command line option) ? Thanks On Thu, Feb 19, 2015 at 3:13 PM, Boudewijn Dijkstra sp4mtr4p.boudew...@indes.com wrote: Op Wed, 18 Feb 2015 10:15:26 +0100 schreef Sai Prajeeth cspraje...@gmail.com: Is there any command that will let me access the processor's performance counters?? I am looking for something like Linux's perf / FreeBSDs pmcstat that will help me get the IPC (Instructions per cycle) of the system. $ apropos 'performance counter' pctr(1) - display CPU performance counters pctr(4/amd64) - driver for CPU performance counters pctr(4/i386) - driver for CPU performance counters uperf(4/sparc64) - performance counters driver -- (Remove the obvious prefix to reply privately.) Gemaakt met Opera's e-mailprogramma: http://www.opera.com/mail/
Performance Counters
Hi, Is there any command that will let me access the processor's performance counters?? I am looking for something like Linux's perf / FreeBSDs pmcstat that will help me get the IPC (Instructions per cycle) of the system. Thanks
Re: cpu performance counters (cache hit/miss etc)
Unless already fixed, I remember this didn't work very well with SMP kernels. If you have problems try to use bsd.sp. Luis. On Tue, Apr 26, 2011 at 9:16 PM, Philip Guenther guent...@gmail.com wrote: On Tue, Apr 26, 2011 at 5:00 PM, David Steiner davidsteiner2...@gmail.com wrote: is there a convenient way to display CPU cache statistics in openbsd? like the amount of L1/L2 hits/misses? there's OProfile for linux, Vtune for Linux/Windows, cachekit for Solaris, but what's available for the best OS out there? sure i could read the intel manuals on accessing the special performance registers to find out. but time is limited. i've searched manpages and on the web without any cache hits so to speak. Did you try searching for the subject of your message? $ apropos 'cpu performance counters' pctr (1) - display CPU performance counters pctr (4/AMD64) - driver for CPU performance counters pctr (4/i386) - driver for CPU performance counters $ Philip Guenther
Re: cpu performance counters (cache hit/miss etc)
On Wed, 27 Apr 2011 14:02:09 -0400 Luis Useche use...@gmail.com wrote: Did you try searching for the subject of your message? $ apropos 'cpu performance counters' pctr (1) - display CPU performance counters pctr (4/AMD64) - driver for CPU performance counters pctr (4/i386) - driver for CPU performance counters $ Philip Guenther thank you philip guenther. just what i was looking for. are there more examples how to use pctr? not so easy to interpret what's going on.
Re: cpu performance counters (cache hit/miss etc)
On Wed, Apr 27, 2011 at 12:28 PM, David Steiner davidsteiner2...@gmail.com wrote: thank you philip guenther. just what i was looking for. are there more examples how to use pctr? not so easy to interpret what's going on. I don't know of anything relevant that isn't already referenced from the manpage. Good luck! Philip Guenther
cpu performance counters (cache hit/miss etc)
hi. is there a convenient way to display CPU cache statistics in openbsd? like the amount of L1/L2 hits/misses? there's OProfile for linux, Vtune for Linux/Windows, cachekit for Solaris, but what's available for the best OS out there? sure i could read the intel manuals on accessing the special performance registers to find out. but time is limited. i've searched manpages and on the web without any cache hits so to speak. David
Re: cpu performance counters (cache hit/miss etc)
On Tue, Apr 26, 2011 at 5:00 PM, David Steiner davidsteiner2...@gmail.com wrote: is there a convenient way to display CPU cache statistics in openbsd? like the amount of L1/L2 hits/misses? there's OProfile for linux, Vtune for Linux/Windows, cachekit for Solaris, but what's available for the best OS out there? sure i could read the intel manuals on accessing the special performance registers to find out. but time is limited. i've searched manpages and on the web without any cache hits so to speak. Did you try searching for the subject of your message? $ apropos 'cpu performance counters' pctr (1) - display CPU performance counters pctr (4/AMD64) - driver for CPU performance counters pctr (4/i386) - driver for CPU performance counters $ Philip Guenther
