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Date: Fri, 27 Aug 2010 20:12:16 -0300 From: Cesar Eduardo Barros <cesarb@...arb.net> To: Joe Perches <joe@...ches.com> CC: Jesse Barnes <jbarnes@...tuousgeek.org>, Matthew Garrett <mjg@...hat.com>, platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] intel_ips: quieten "power or thermal limit exceeded" messages Em 27-08-2010 04:39, Joe Perches escreveu: > On Thu, 2010-08-26 at 22:38 -0300, Cesar Eduardo Barros wrote: >> intel ips 0000:00:1f.6: CPU power limit 3863 exceeded: 0 >> >> I think you put the parameters in the wrong order on the dev_info() call >> for the CPU power limit; it is the limit that is 0. > > Yes. Fixed. > >> Two bogus things I can see: >> >> - The first "MCP power limit exceeded" seems very bogus. >> - What do you mean, core_power_limit is zero? > > I added a logging message whenever the turbo limits change > and logging messages for power/temp on MCH for completeness. > > Maybe this will show something useful like when/how > CPU power limit gets set to 0. Running with it right now, did not help much: $ dmesg | fgrep 'intel ips' intel ips 0000:00:1f.6: Warning: CPU TDP doesn't match expected value (found 25, expected 35) intel ips 0000:00:1f.6: PCI INT C -> GSI 18 (level, low) -> IRQ 18 intel ips 0000:00:1f.6: IPS driver initialized, MCP temp limit 65535 intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:8058 + mch:23392829 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5675 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6369 intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:5095 + mch:65379 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 7387 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 8326 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5943 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6428 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5775 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 7061 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5153 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5098 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5208 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 7500 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 9144 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6722 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 7156 intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:5693 + mch:64598 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5856 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4209 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4726 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5259 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5212 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4862 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5281 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4235 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4897 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5257 intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:5111 + mch:64134 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4843 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4909 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5904 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6059 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5579 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5970 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5213 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6388 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4444 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6545 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4439 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4682 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4337 intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4499 Just for fun, here is what debugfs has to say: $ ls /sys/kernel/debug/ips/ cpu_clamp cpu_power cpu_temp mch_power mch_temp $ cat /sys/kernel/debug/ips/* 23.0W 21.0A 4415mW 46.99 59670mW 0.00 All numbers except the last vary a lot. A few more examples: 21.0W 21.0A 4379mW 51.09 6493mW 0.00 23.0W 21.0A 4681mW 45.13 34062mW 0.00 -- Cesar Eduardo Barros cesarb@...arb.net cesar.barros@...il.com -- 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/
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