cellular-infrastructure
/
osmo-pcu
mirror of https://gerrit.osmocom.org/osmo-pcu
9
0
Fork 1
Code Issues Releases Wiki Activity

alloc: Optimize find_free_usf 

According to callgrind, this function consumes 33% CPU when running
the AllocTest program.

This commit uses the assigned_usf() method to get the USFs allocated
by a PDCH instead of traversing the TBFs.

Sponsored-by: On-Waves ehf
This commit is contained in:
Jacob Erlbeck 2015-06-30 14:34:24 +02:00
parent cc9358f95a
commit 20b7ba7501
1 changed files with 4 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/gprs_rlcmac_ts_alloc.cpp
View File

@ -115,17 +115,12 @@ static bool test_and_set_bit(uint32_t *bits, size_t elem)
static inline int8_t find_free_usf(struct gprs_rlcmac_pdch *pdch) static inline int8_t find_free_usf(struct gprs_rlcmac_pdch *pdch)
{ {
struct gprs_rlcmac_ul_tbf *tbf;
uint8_t usf_map = 0; uint8_t usf_map = 0;
uint8_t tfi, usf; uint8_t usf;
/* make map of used USF */ usf_map = pdch->assigned_usf();
for (tfi = 0; tfi < 32; tfi++) { if (usf_map == (1 << 7) - 1)
tbf = pdch->ul_tbf_by_tfi(tfi); return -1;
if (!tbf)
continue;
usf_map |= (1 << tbf->m_usf[pdch->ts_no]);
}
/* look for USF, don't use USF=7 */ /* look for USF, don't use USF=7 */
for (usf = 0; usf < 7; usf++) { for (usf = 0; usf < 7; usf++) {