Gary Thomas <gary@xxxxxxxxxxxx> writes: > On 2012-04-12 12:08, Kevin Hilman wrote: >> Gary Thomas<gary@xxxxxxxxxxxx> writes: >> >>> On 2012-04-12 10:57, Kevin Hilman wrote: >>>> +Felipe for EHCI question >>>> >>>> Gary Thomas<gary@xxxxxxxxxxxx> writes: >>>> >>>> [...] >>>> >>>>> This worked a treat, thanks. My network performance is better >>>>> now, but still not what it was. The same TFTP transfer now takes >>>>> 71 seconds, so about 50% slower than on the 3.0 kernel. Applying the >>>>> second [unnamed] patch (arch/arm/mach-omap2/cpuidle34xx.c) made no difference. >>>> >>>> And does a CONFIG_PM=n kernel get you back to your v3.0 performance? >>> >>> Correct. >>> >> >> OK, I just tried your TFTP experiment on a 3530/Overo board with the >> same smsc911x NIC that has GPIO interrupts, and I don't see much >> difference between a PM-enabled v3.0 and a PM-enabled v3.3. >> >> Are you TFTP'ing the file to an MMC filesystem? Can you try to a >> ramdisk[1]? If you're using MMC, it could be MMC driver changes since >> v3.0 that are actually causing your performance hit. > > I'm testing to a ramdisk, so we're on the same page. > > Could you send me your config file so I can compare? Maybe I have something > "dumb" in my settings that aggravates things. Below is the Kconfig snippet[1] I append to a default omap2plus_defconfig to enable CPUidle, CPUfreq and some debug. Rebuild with that appended and these settings override the default ones. I used omap2plus_defcnfig plus this snippit for v3.0, v3.3 and v3.4-rc2 tests. > Also, what's your performance on 3.4-rc2? The linux-media tree I started > from is a bit post v3.3, so there might be something else causing this. I just tried with vanilla v3.4-rc2, and I see basically the same results. Between 35 and 50 seconds for the 24Mb file transfer, which is similar to the v3.0 and v3.3 results. Kevin [1] CONFIG_CPU_IDLE=y CONFIG_PM_ADVANCED_DEBUG=y CONFIG_PM_SLEEP_ADVANCED_DEBUG=y CONFIG_PM_GENERIC_DOMAINS=y CONFIG_OMAP_SMARTREFLEX=y CONFIG_OMAP_SMARTREFLEX_CLASS3=y CONFIG_CPU_FREQ=y CONFIG_CPU_FREQ_TABLE=y CONFIG_CPU_FREQ_STAT=y CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y CONFIG_CPU_FREQ_GOV_USERSPACE=y CONFIG_CPU_FREQ_GOV_ONDEMAND=y CONFIG_CPU_FREQ_GOV_POWERSAVE=y CONFIG_CPU_FREQ_GOV_PERFORMANCE=y CONFIG_ARM_OMAP2PLUS_CPUFREQ=y CONFIG_REGULATOR_OMAP_SMPS=y CONFIG_DEBUG_LL=y CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_USER=y CONFIG_EARLY_PRINTK=y CONFIG_DEBUG_SECTION_MISMATCH=y -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
