Displaying 3 results from an estimated 3 matches for "running_coroutines".
2017 Nov 15
3
Effect of qemu-img convert -m and -W options
[CC to qemu-devel since I'm obviously doing something wrong here,
I'm just not sure what.]
I was getting ready to add multiple threads to ‘qemu-img convert’ (the
longest part of v2v conversions) when I noticed that it had them
already! (To be fair this was only added in February this year so no
wonder we didn't notice.)
To enable parallel convert we would need to use the ‘qemu-img
2017 Nov 16
0
Re: [Qemu-devel] Effect of qemu-img convert -m and -W options
...c runs in coroutines from just one main loop
thread in qemu-img.c:convert_do_copy():
for (i = 0; i < s->num_coroutines; i++) {
s->co[i] = qemu_coroutine_create(convert_co_do_copy, s);
s->wait_sector_num[i] = -1;
qemu_coroutine_enter(s->co[i]);
}
while (s->running_coroutines) {
main_loop_wait(false);
}
>
> I did some testing to see what effect this has. For this I used a
> large guest image which is approximately a third full of random data
> (the rest being sparsely allocated):
>
> Source format: raw
> Source virtual size: 10...
2017 Nov 16
2
Re: [Qemu-devel] Effect of qemu-img convert -m and -W options
...thread in qemu-img.c:convert_do_copy():
>
> for (i = 0; i < s->num_coroutines; i++) {
> s->co[i] = qemu_coroutine_create(convert_co_do_copy, s);
> s->wait_sector_num[i] = -1;
> qemu_coroutine_enter(s->co[i]);
> }
>
> while (s->running_coroutines) {
> main_loop_wait(false);
> }
>
>> I did some testing to see what effect this has. For this I used a
>> large guest image which is approximately a third full of random data
>> (the rest being sparsely allocated):
>>
>> Source format: raw...