linux-kernel - Re: Performance Events hangs with Intel P4 system

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 14 May 2010 21:30:12 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Jaswinder Singh Rajput <jaswinderlinux@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Lin Ming <ming.m.lin@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: Performance Events hangs with Intel P4 system

On Fri, May 14, 2010 at 10:06:44PM +0530, Jaswinder Singh Rajput wrote:
... 
> Ok, I added few more events and now I am able see few hardware events :
> 
> $ ./perf stat -e
> cycles,instructions,cache-references,cache-misses,branches,branch-misses,bus-cycles,L1-dcache-loads,L1-dcache-load-misses,L1-dcache-stores,L1-dcache-store-misses,L1-dcache-prefetches,L1-dcache-prefetch-misses,L1-icache-loads,L1-icache-load-misses,L1-icache-prefetches,L1-icache-prefetch-misses,LLC-loads,LLC-load-misses,LLC-stores,LLC-store-misses,LLC-prefetches,LLC-prefetch-misses,dTLB-loads,dTLB-load-misses,dTLB-stores,dTLB-store-misses,dTLB-prefetches,dTLB-prefetch-misses,iTLB-loads,iTLB-load-misses
> ls -lR /dev > /dev/null
> 

ok, they work as expected. Could you try only "cycles"? The things are
that different events may attempt to borrow same resources already allocated
for another event, ie they can't run simultaneously. And iirc we encode
only a subset of chache events. Though all "general" events should work.
(by "general" events I mean "cycles", "instructions", "cache-references",
 "cache-misses", "branch-instructions", "branch-misses", "bus-cycles").
Could you check them one-by-one?

	-- Cyrill
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/