Have you ever noticed that sometimes your android device feels really sluggish and your cpu graph app (I use CpuNotify) is showing that your CPU is pegged? I believe the most effective way to determine what's causing the phone to slow down is top. Don't install apps that do similar stuff from the market - top will be more accurate and reliable.
Let's look at an example. The other day my DX was just running dog slow and CpuNotify was telling me that the CPU was maxed out. So I launch Terminal, run top, and scroll up:
# top -m 4 -n 3 -s cpu
User 83%, System 2%, IOW 4%, IRQ 0%WTF!?! What's my browser doing? It turned out I made a classic mistake of going to a javascript intensive website and forgot to close the window. Nine out of 10 times when your phone seems really sluggish, it's probably a runaway javascript that's still running on a browser window in the background.
User 217 + Nice 0 + Sys 7 + Idle 75 + IOW 13 + IRQ 0 + SIRQ 0 = 312
PID CPU% S #THR VSS RSS PCY UID Name
27769 80% S 21 236568K 69156K bg app_74 com.dolphin.browser
18230 1% S 71 359916K 61852K fg system system_server
27888 1% R 1 848K 420K fg root top
18311 0% S 12 186360K 22416K fg app_33 net.thinkindifferent.inputmethod.latin[ snip ]
So what do you do then? Well you can bring the browser to the foreground again and close the offending tab/window. Or you can just kill it from shell:
pkill -f browser
No comments:
Post a Comment