[Q] CPU usage while playing music - Sony Xperia P, U, Sola, Go

Recently I've been noticing an increment in battery usage while playing music, at first, I thought it was because I upgraded my earphones (from Sennheiser CX300 to Shure SE215), but it doesn't seem to be the case, as I still have the older ones and the problem remains.
So I just started monitoring, well, the CPU usage, I started Google Play Music (but the integrated Player on ICS also suffers from the same problem), and let CPU spy log 13~ minutes of music playing while the screen was locked and off. Things get worst with the screen on and actually using the phone, simple tasks as webpages loading makes the music skip badly.
Is this kind of CPU usage normal while you're just playing music?
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Oh, and I'm on stock ICS on a Xperia S.

---

DrKrFfXx said:
Recently I've been noticing an increment in battery usage while playing music, at first, I thought it was because I upgraded my earphones (from Sennheiser CX300 to Shure SE215), but it doesn't seem to be the case, as I still have the older ones and the problem remains.
So I just started monitoring, well, the CPU usage, I started Google Play Music (but the integrated Player on ICS also suffers from the same problem), and let CPU spy log 13~ minutes of music playing while the screen was locked and off. Things get worst with the screen on and actually using the phone, simple tasks as webpages loading makes the music skip badly.
Is this kind of CPU usage normal while you're just playing music?
Oh, and I'm on stock ICS on a Xperia S.
Click to expand...
Click to collapse
Absolutely not..my cpu is in deep sleep often when playing music..see what processes are running..and what governor do u use?is ur phone rooted?
Sent from my Amfir Mimi BEK' Xperia™ S "LT26i" using xda premium

---

Well, my phone is rooted, and I have the governor set to conservative in CPU Master or whatever it's called.
About the running proceses, I don't think there is anything draining the battery all by itself, because it's only when playing music that I see suspicious CPU usage. Otherwise, my phone enters deep sleep mode when locked.

---

DrKrFfXx said:
Well, my phone is rooted, and I have the governor set to conservative in CPU Master or whatever it's called.
About the running proceses, I don't think there is anything draining the battery all by itself, because it's only when playing music that I see suspicious CPU usage. Otherwise, my phone enters deep sleep mode when locked.
Click to expand...
Click to collapse
Wait..this values are when listenning to music and phone locked or u use it??
Then what kernel u have? Try change kernel.. i use KSSpeed kernel here: http://forum.xda-developers.com/showthread.php?p=28510568
With pegasusq governor and it's batt and temp and cpu friendly
Sent from my Amfir Mimi BEK' Xperia™ active "ST17i" using xda premium

---

amfirbek92 said:
Wait..this values are when listenning to music and phone locked or u use it??
Then what kernel u have? Try change kernel.. i use KSSpeed kernel here: http://forum.xda-developers.com/showthread.php?p=28510568
With pegasusq governor and it's batt and temp and cpu friendly
Sent from my Amfir Mimi BEK' Xperia™ active "ST17i" using xda premium
Click to expand...
Click to collapse
Those values are while just playing music and the screen is locked.
I have stock kernel, since my bootloader is locked.

---

DrKrFfXx said:
Those values are while just playing music and the screen is locked.
I have stock kernel, since my bootloader is locked.
Click to expand...
Click to collapse
Recheck the processes(am sure the prob is here) and u can try kernels..i gave u my opinion gd luck
Sent from my Amfir Mimi BEK' Xperia™ active "ST17i" using xda premium

---

I'll recheck everything, but I don't think I can use another kernel since my bootloader is locked, can I?
Thanks for the help.

---

DrKrFfXx said:
I'll recheck everything, but I don't think I can use another kernel since my bootloader is locked, can I?
Thanks for the help.
Click to expand...
Click to collapse
Sure not..donno how? I can help u too
Sent from my Amfir Mimi BEK' Xperia™ active "ST17i" using xda premium

---

Well, just an update for my issue. I have deleted (deleted files, not formatted) every media file of my phone (had well over 1900 songs, bazillion of photos and well, some other stuff), and reorganized my songlist with just the basics songs (468 as of now), and no photos.
CPU consumption went down to this level:
It's no where near deep sleep levels, but I can feel the phone being more responsive, and well, those 15 min of music played drained 1% of my battery according to battery stats, compared to the 8-9% the previous 13 or so minuted drained.
I can only imagine the problem being related to the amount of files the mediaserver process had to index, a file being corrupted and was being checked continuously or something the likes of that.
I'll continue researching.

---

Phone won't be in deep sleep when it's playing music, but will be running in min CPU.