100% (single) core load on Windows

[vshymanskyy]

SerialPort v5.0.0
Node version is v7.9.0
Electron version is 1.7.5
Windows 10 (32-bit)

Summary of Problem

On Windows, once a serial port is opened (manufacturer:"wch.cn", vid:"1A86", pid:"7523"),
I experience 100% (single) core load on Windows. On Linux, the same app produces nearly 0 load.

Using Process Monitor, I obtained a stacktrace of the busy thread:

ntdll.dll!KiFastSystemCallRet
serialport.node!EIO_Read+0x62
node.dll!uv_fs_poll_stop+0x1ad
node.dll!uv_queue_work+0xfc
ucrtbase.dll!set_app_type+0x4f
KERNEL32.DLL!BaseThreadInitThunk+0x24
ntdll.dll!RtlCheckRegistryKey+0xfbb
ntdll.dll!RtlCheckRegistryKey+0xf8f

[vshymanskyy]

possibly related to #1221

[reconbot]

100% related

…

On Wed, Aug 23, 2017 at 3:57 PM Volodymyr Shymanskyy < ***@***.***> wrote: possibly related to #1221 <#1221> — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1308 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABlbvKMZSOa-keJ-AgLkh5X0FABwDnnks5sbIQYgaJpZM4PAfqj> .

[vshymanskyy]

Ok, good to know. But putting 100% load on one core is weird - I would expect minor load increase due to sync. operation (and, of course thread count limitation).

[reconbot]

We're not doing it right, in any case. Your trace shows the read process is being called.

…

On Thu, Aug 24, 2017, 3:48 AM Volodymyr Shymanskyy ***@***.***> wrote: Ok, good to know. But putting 100% load on one core is weird - I would expect minor load increase due to sync. operation (and, of course thread count limitation). — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1308 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABlbqMRmbznRg40IL13cMfbJShe03cWks5sbSqvgaJpZM4PAfqj> .