Message 328364 - Python tracker

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Author	vstinner
Recipients	methane, serhiy.storchaka, vstinner
Date	2018-10-24.12:19:05
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1540383545.33.0.788709270274.issue35053@psf.upfronthosting.co.za>
In-reply-to

Content
A little bit of history. I opened a bug 2 years ago but I closed it (lack of interest): https://github.com/vstinner/pytracemalloc/issues/2 I rewrote tracemalloc between version 0.9 and 1.0. In tracemalloc 0.9, there was an API to track free lists. Here is the code to handle "alloc" and "free" of an object inside a freelist: https://github.com/vstinner/pytracemalloc/blob/a2b2616fc73cd5ce0ea45d1b68a490e0fc52ccc8/_tracemalloc.c#L291-L337 My PR 10063 has a more correct and efficient implementation: * It keeps the trace alive when the object moves into the free list to report the real memory usage of Python: the free lists consumes memory * It writes directly into the hash table entry rather than remove/add frequently the trace, it should be more efficient

A little bit of history.

I opened a bug 2 years ago but I closed it (lack of interest):
https://github.com/vstinner/pytracemalloc/issues/2

I rewrote tracemalloc between version 0.9 and 1.0. In tracemalloc 0.9, there was an API to track free lists. Here is the code to handle "alloc" and "free" of an object inside a freelist:

https://github.com/vstinner/pytracemalloc/blob/a2b2616fc73cd5ce0ea45d1b68a490e0fc52ccc8/_tracemalloc.c#L291-L337

My PR 10063 has a more correct and efficient implementation:

* It keeps the trace alive when the object moves into the free list to report the real memory usage of Python: the free lists consumes memory
* It writes directly into the hash table entry rather than remove/add frequently the trace, it should be more efficient

History
Date	User	Action	Args
2018-10-24 12:19:05	vstinner	set	recipients: + vstinner, methane, serhiy.storchaka
2018-10-24 12:19:05	vstinner	set	messageid: <1540383545.33.0.788709270274.issue35053@psf.upfronthosting.co.za>
2018-10-24 12:19:05	vstinner	link	issue35053 messages
2018-10-24 12:19:05	vstinner	create