Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [Suspend-devel] Resume performance | Date | Fri, 5 Sep 2008 20:43:38 +0200 |
| |
On Friday, 5 of September 2008, Anders Aagaard wrote: > Rafael J. Wysocki wrote: > > On Friday, 5 of September 2008, Anders Aagaard wrote: > >> Hi > > > > Hi, > > > > This is a kernel problem, so let's CC the LKML. > > > >> I have a intel P35 board with a quad core cpu in it, it's currently > >> running as a server for a small network, and I'd like to be able to shut > >> it down when idle, and use wake on lan to wake it up when it's needed. > >> Now I got that part working quite well, but for some reason I have a > >> long delay in resume. > >> > >> I seem to remember being able to resume this computer in 2-3 seconds > >> when I was testing it, now it needs 35 seconds to resume. It seems > >> regardless of resume options used, and it always resumes to a working > >> state without problems. > > > > What kernel are you using at the moment and which one was used for the > > testing? > > I'm using gentoo's 2.6.25-r7, I've also tried vanilla sources.
Would it be possible to test 2.6.27-rc5-gi7 from kernel.org?
> >> I've tried quite a lot of things, booting with noapic/nosmp, booting a > >> kernel without usb/network drivers, disabling ahci (using ata_piix > >> driver instead of ahci), and there's always that one long delay. And > >> I'm not quite sure how the kernel printk timing information works, so > >> I'm not sure whats causing that delay. > >> > >> Output from dmesg when booting with nosmp (to get accurate timing data): > >> scripts/show_delta -b "Force enabled HPET at resume" > >> [349.821150 < 7.039261 >] ata3.00: configured for UDMA/133 > >> [349.821160 < 7.039271 >] sd 2:0:0:0: [sdc] 976773168 512-byte hardware > >> sectors (500108 MB) > >> [349.821165 < 7.039276 >] sd 2:0:0:0: [sdc] Write Protect is off > >> [349.821166 < 7.039277 >] sd 2:0:0:0: [sdc] Mode Sense: 00 3a 00 00 > >> [349.821173 < 7.039284 >] sd 2:0:0:0: [sdc] Write cache: enabled, read > >> cache: enabled, doesn't support DPO or FUA > >> [349.972801 < 7.190912 >] ata1: SATA link up 3.0 Gbps (SStatus 123 > >> SControl 300) > >> [349.979060 < 7.197171 >] ata1.00: configured for UDMA/133 > >> [349.979070 < 7.197181 >] sd 0:0:0:0: [sda] 976771055 512-byte hardware > >> sectors (500107 MB) > >> [349.979075 < 7.197186 >] sd 0:0:0:0: [sda] Write Protect is off > >> [349.979076 < 7.197187 >] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 > >> [349.979083 < 7.197194 >] sd 0:0:0:0: [sda] Write cache: enabled, read > >> cache: enabled, doesn't support DPO or FUA > > > > It looks like this happens here. Can you try to unload the network driver > > before suspend, please? > > I tried to build a kernel without it, and it still takes the exact same > amount to boot, I've also tried unloading usb drivers and it takes the > exact same amount of time.
Can you try to boot with init=/bin/bash and suspend to RAM? (Please have a look at section 2 of Documentation/power/basic-pm-debugging.txt in the newer kernel sources).
Thanks, Rafael
| |